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0x00. AirBnB clone - The console

Concepts

For this project, we expect you to look at these concepts:

Background Context

Welcome to the AirBnB clone project!

Before starting, please read the AirBnB concept page.

First step: Write a command interpreter to manage your AirBnB objects.

This is the first step towards building your first full web application: the AirBnB clone. This first step is very important because you will use what you build during this project with all other following projects: HTML/CSS templating, database storage, API, front-end integration…

Each task is linked and will help you to:

  • put in place a parent class (called BaseModel) to take care of the initialization, serialization and deserialization of your future instances
  • create a simple flow of serialization/deserialization: Instance <-> Dictionary <-> JSON string <-> file
  • create all classes used for AirBnB (User, State, City, Place…) that inherit from BaseModel
  • create the first abstracted storage engine of the project: File storage.
  • create all unittests to validate all our classes and storage engine

What’s a command interpreter?

Do you remember the Shell? It’s exactly the same but limited to a specific use-case. In our case, we want to be able to manage the objects of our project:

  • Create a new object (ex: a new User or a new Place)
  • Retrieve an object from a file, a database etc…
  • Do operations on objects (count, compute stats, etc…)
  • Update attributes of an object
  • Destroy an object

Resources

Read or watch:

Learning Objectives

At the end of this project, you are expected to be able to explain to anyone, without the help of Google:

General

  • How to create a Python package
  • How to create a command interpreter in Python using the cmd module
  • What is Unit testing and how to implement it in a large project
  • How to serialize and deserialize a Class
  • How to write and read a JSON file
  • How to manage datetime
  • What is an UUID
  • What is *args and how to use it
  • What is **kwargs and how to use it
  • How to handle named arguments in a function

Copyright - Plagiarism

  • You are tasked to come up with solutions for the tasks below yourself to meet with the above learning objectives.
  • You will not be able to meet the objectives of this or any following project by copying and pasting someone else’s work.
  • You are not allowed to publish any content of this project.
  • Any form of plagiarism is strictly forbidden and will result in removal from the program.

Requirements

Python Scripts

  • Allowed editors: vi, vim, emacs
  • All your files will be interpreted/compiled on Ubuntu 20.04 LTS using python3 (version 3.8.5)
  • All your files should end with a new line
  • The first line of all your files should be exactly #!/usr/bin/python3
  • A README.md file, at the root of the folder of the project, is mandatory
  • Your code should use the pycodestyle (version 2.8.*)
  • All your files must be executable
  • The length of your files will be tested using wc
  • All your modules should have a documentation (python3 -c 'print(__import__("my_module").__doc__)')
  • All your classes should have a documentation (python3 -c 'print(__import__("my_module").MyClass.__doc__)')
  • All your functions (inside and outside a class) should have a documentation (python3 -c 'print(__import__("my_module").my_function.__doc__)' and python3 -c 'print(__import__("my_module").MyClass.my_function.__doc__)')
  • A documentation is not a simple word, it’s a real sentence explaining what’s the purpose of the module, class or method (the length of it will be verified)

Python Unit Tests

  • Allowed editors: vi, vim, emacs
  • All your files should end with a new line
  • All your test files should be inside a folder tests
  • You have to use the unittest module
  • All your test files should be python files (extension: .py)
  • All your test files and folders should start by test_
  • Your file organization in the tests folder should be the same as your project
  • e.g., For models/base_model.py, unit tests must be in: tests/test_models/test_base_model.py
  • e.g., For models/user.py, unit tests must be in: tests/test_models/test_user.py
  • All your tests should be executed by using this command: python3 -m unittest discover tests
  • You can also test file by file by using this command: python3 -m unittest tests/test_models/test_base_model.py
  • All your modules should have a documentation (python3 -c 'print(__import__("my_module").__doc__)')
  • All your classes should have a documentation (python3 -c 'print(__import__("my_module").MyClass.__doc__)')
  • All your functions (inside and outside a class) should have a documentation (python3 -c 'print(__import__("my_module").my_function.__doc__)' and python3 -c 'print(__import__("my_module").MyClass.my_function.__doc__)')
  • We strongly encourage you to work together on test cases, so that you don’t miss any edge case

GitHub

There should be one project repository per group. If you clone/fork/whatever a project repository with the same name before the second deadline, you risk a 0% score.

More Info

Execution

Your shell should work like this in interactive mode:

    $ ./console.py
    (hbnb) help
    
    Documented commands (type help <topic>):
    ========================================
    EOF  help  quit
    
    (hbnb) 
    (hbnb) 
    (hbnb) quit
    $

But also in non-interactive mode: (like the Shell project in C)

    $ echo "help" | ./console.py
    (hbnb)
    
    Documented commands (type help <topic>):
    ========================================
    EOF  help  quit
    (hbnb) 
    $
    $ cat test_help
    help
    $
    $ cat test_help | ./console.py
    (hbnb)
    
    Documented commands (type help <topic>):
    ========================================
    EOF  help  quit
    (hbnb) 
    $

All tests should also pass in non-interactive mode: $ echo "python3 -m unittest discover tests" | bash

Tasks

0. README, AUTHORS

mandatory

  • Write a README.md:
    • description of the project
    • description of the command interpreter:
      • how to start it
      • how to use it
      • examples
  • You should have an AUTHORS file at the root of your repository, listing all individuals having contributed content to the repository. For format, reference Docker’s AUTHORS page
  • You should use branches and pull requests on GitHub - it will help you as team to organize your work

Repo:

  • GitHub repository: AirBnB_clone
  • File: README.md, AUTHORS

1. Be pycodestyle compliant!

mandatory

Write beautiful code that passes the pycodestyle checks.

Repo:

  • GitHub repository: AirBnB_clone

2. Unittests

mandatory

All your files, classes, functions must be tested with unit tests

    guillaume@ubuntu:~/AirBnB$ python3 -m unittest discover tests
    ...................................................................................
    ...................................................................................
    .......................
    ----------------------------------------------------------------------
    Ran 189 tests in 13.135s
    
    OK
    guillaume@ubuntu:~/AirBnB$

Note that this is just an example, the number of tests you create can be different from the above example.

Warning:

Unit tests must also pass in non-interactive mode:

    guillaume@ubuntu:~/AirBnB$ echo "python3 -m unittest discover tests" | bash
    ...................................................................................
    ...................................................................................
    .......................
    ----------------------------------------------------------------------
    Ran 189 tests in 13.135s
    
    OK
    guillaume@ubuntu:~/AirBnB$

Repo:

  • GitHub repository: AirBnB_clone
  • File: tests/

3. BaseModel

mandatory

Write a class BaseModel that defines all common attributes/methods for other classes:

  • models/base_model.py
  • Public instance attributes:
    • id: string - assign with an uuid when an instance is created:
      • you can use uuid.uuid4() to generate unique id but don’t forget to convert to a string
      • the goal is to have unique id for each BaseModel
    • created_at: datetime - assign with the current datetime when an instance is created
    • updated_at: datetime - assign with the current datetime when an instance is created and it will be updated every time you change your object
  • __str__: should print: [<class name>] (<self.id>) <self.__dict__>
  • Public instance methods:
    • save(self): updates the public instance attribute updated_at with the current datetime
    • to_dict(self): returns a dictionary containing all keys/values of __dict__ of the instance:
      • by using self.__dict__, only instance attributes set will be returned
      • a key __class__ must be added to this dictionary with the class name of the object
      • created_at and updated_at must be converted to string object in ISO format:
        • format: %Y-%m-%dT%H:%M:%S.%f (ex: 2017-06-14T22:31:03.285259)
        • you can use isoformat() of datetime object
      • This method will be the first piece of the serialization/deserialization process: create a dictionary representation with “simple object type” of our BaseModel
    guillaume@ubuntu:~/AirBnB$ cat test_base_model.py
    #!/usr/bin/python3
    from models.base_model import BaseModel
    
    my_model = BaseModel()
    my_model.name = "My First Model"
    my_model.my_number = 89
    print(my_model)
    my_model.save()
    print(my_model)
    my_model_json = my_model.to_dict()
    print(my_model_json)
    print("JSON of my_model:")
    for key in my_model_json.keys():
        print("\t{}: ({}) - {}".format(key, type(my_model_json[key]), my_model_json[key]))
    
    guillaume@ubuntu:~/AirBnB$ ./test_base_model.py
    [BaseModel] (b6a6e15c-c67d-4312-9a75-9d084935e579) {'my_number': 89, 'name': 'My First Model', 'updated_at': datetime.datetime(2017, 9, 28, 21, 5, 54, 119434), 'id': 'b6a6e15c-c67d-4312-9a75-9d084935e579', 'created_at': datetime.datetime(2017, 9, 28, 21, 5, 54, 119427)}
    [BaseModel] (b6a6e15c-c67d-4312-9a75-9d084935e579) {'my_number': 89, 'name': 'My First Model', 'updated_at': datetime.datetime(2017, 9, 28, 21, 5, 54, 119572), 'id': 'b6a6e15c-c67d-4312-9a75-9d084935e579', 'created_at': datetime.datetime(2017, 9, 28, 21, 5, 54, 119427)}
    {'my_number': 89, 'name': 'My First Model', '__class__': 'BaseModel', 'updated_at': '2017-09-28T21:05:54.119572', 'id': 'b6a6e15c-c67d-4312-9a75-9d084935e579', 'created_at': '2017-09-28T21:05:54.119427'}
    JSON of my_model:
        my_number: (<class 'int'>) - 89
        name: (<class 'str'>) - My First Model
        __class__: (<class 'str'>) - BaseModel
        updated_at: (<class 'str'>) - 2017-09-28T21:05:54.119572
        id: (<class 'str'>) - b6a6e15c-c67d-4312-9a75-9d084935e579
        created_at: (<class 'str'>) - 2017-09-28T21:05:54.119427
    
    guillaume@ubuntu:~/AirBnB$

Repo:

  • GitHub repository: AirBnB_clone
  • File: models/base_model.py, models/__init__.py, tests/

4. Create BaseModel from dictionary

mandatory

Previously we created a method to generate a dictionary representation of an instance (method to_dict()).

Now it’s time to re-create an instance with this dictionary representation.

<class 'BaseModel'> -> to_dict() -> <class 'dict'> -> <class 'BaseModel'>

Update models/base_model.py:

  • __init__(self, *args, **kwargs):
    • you will use *args, **kwargs arguments for the constructor of a BaseModel. (more information inside the AirBnB clone concept page)
    • *args won’t be used
    • if kwargs is not empty:
      • each key of this dictionary is an attribute name (Note __class__ from kwargs is the only one that should not be added as an attribute. See the example output, below)
      • each value of this dictionary is the value of this attribute name
      • Warning: created_at and updated_at are strings in this dictionary, but inside your BaseModel instance is working with datetime object. You have to convert these strings into datetime object. Tip: you know the string format of these datetime
    • otherwise:
      • create id and created_at as you did previously (new instance)
    guillaume@ubuntu:~/AirBnB$ cat test_base_model_dict.py
    #!/usr/bin/python3
    from models.base_model import BaseModel
    
    my_model = BaseModel()
    my_model.name = "My_First_Model"
    my_model.my_number = 89
    print(my_model.id)
    print(my_model)
    print(type(my_model.created_at))
    print("--")
    my_model_json = my_model.to_dict()
    print(my_model_json)
    print("JSON of my_model:")
    for key in my_model_json.keys():
        print("\t{}: ({}) - {}".format(key, type(my_model_json[key]), my_model_json[key]))
    
    print("--")
    my_new_model = BaseModel(**my_model_json)
    print(my_new_model.id)
    print(my_new_model)
    print(type(my_new_model.created_at))
    
    print("--")
    print(my_model is my_new_model)
    
    guillaume@ubuntu:~/AirBnB$ ./test_base_model_dict.py
    56d43177-cc5f-4d6c-a0c1-e167f8c27337
    [BaseModel] (56d43177-cc5f-4d6c-a0c1-e167f8c27337) {'id': '56d43177-cc5f-4d6c-a0c1-e167f8c27337', 'created_at': datetime.datetime(2017, 9, 28, 21, 3, 54, 52298), 'my_number': 89, 'updated_at': datetime.datetime(2017, 9, 28, 21, 3, 54, 52302), 'name': 'My_First_Model'}
    <class 'datetime.datetime'>
    --
    {'id': '56d43177-cc5f-4d6c-a0c1-e167f8c27337', 'created_at': '2017-09-28T21:03:54.052298', '__class__': 'BaseModel', 'my_number': 89, 'updated_at': '2017-09-28T21:03:54.052302', 'name': 'My_First_Model'}
    JSON of my_model:
        id: (<class 'str'>) - 56d43177-cc5f-4d6c-a0c1-e167f8c27337
        created_at: (<class 'str'>) - 2017-09-28T21:03:54.052298
        __class__: (<class 'str'>) - BaseModel
        my_number: (<class 'int'>) - 89
        updated_at: (<class 'str'>) - 2017-09-28T21:03:54.052302
        name: (<class 'str'>) - My_First_Model
    --
    56d43177-cc5f-4d6c-a0c1-e167f8c27337
    [BaseModel] (56d43177-cc5f-4d6c-a0c1-e167f8c27337) {'id': '56d43177-cc5f-4d6c-a0c1-e167f8c27337', 'created_at': datetime.datetime(2017, 9, 28, 21, 3, 54, 52298), 'my_number': 89, 'updated_at': datetime.datetime(2017, 9, 28, 21, 3, 54, 52302), 'name': 'My_First_Model'}
    <class 'datetime.datetime'>
    --
    False
    guillaume@ubuntu:~/AirBnB$

Repo:

  • GitHub repository: AirBnB_clone
  • File: models/base_model.py, tests/

5. Store first object

mandatory

Now we can recreate a BaseModel from another one by using a dictionary representation:

<class 'BaseModel'> -> to_dict() -> <class 'dict'> -> <class 'BaseModel'>

It’s great but it’s still not persistent: every time you launch the program, you don’t restore all objects created before… The first way you will see here is to save these objects to a file.

Writing the dictionary representation to a file won’t be relevant:

  • Python doesn’t know how to convert a string to a dictionary (easily)
  • It’s not human readable
  • Using this file with another program in Python or other language will be hard.

So, you will convert the dictionary representation to a JSON string. JSON is a standard representation of a data structure. With this format, humans can read and all programming languages have a JSON reader and writer.

Now the flow of serialization-deserialization will be:

<class 'BaseModel'> -> to_dict() -> <class 'dict'> -> JSON dump -> <class 'str'> -> FILE -> <class 'str'> -> JSON load -> <class 'dict'> -> <class 'BaseModel'>

Magic right?

Terms:

  • simple Python data structure: Dictionaries, arrays, number and string. ex: { '12': { 'numbers': [1, 2, 3], 'name': "John" } }
  • JSON string representation: String representing a simple data structure in JSON format. ex: '{ "12": { "numbers": [1, 2, 3], "name": "John" } }'

Write a class FileStorage that serializes instances to a JSON file and deserializes JSON file to instances:

  • models/engine/file_storage.py
  • Private class attributes:
    • __file_path: string - path to the JSON file (ex: file.json)
    • __objects: dictionary - empty but will store all objects by <class name>.id (ex: to store a BaseModel object with id=12121212, the key will be BaseModel.12121212)
  • Public instance methods:
    • all(self): returns the dictionary __objects
    • new(self, obj): sets in __objects the obj with key <obj class name>.id
    • save(self): serializes __objects to the JSON file (path: __file_path)
    • reload(self): deserializes the JSON file to __objects (only if the JSON file (__file_path) exists ; otherwise, do nothing. If the file doesn’t exist, no exception should be raised)

Update models/__init__.py: to create a unique FileStorage instance for your application

  • import file_storage.py
  • create the variable storage, an instance of FileStorage
  • call reload() method on this variable

Update models/base_model.py: to link your BaseModel to FileStorage by using the variable storage

  • import the variable storage
  • in the method save(self):
    • call save(self) method of storage
  • __init__(self, *args, **kwargs):
    • if it’s a new instance (not from a dictionary representation), add a call to the method new(self) on storage
    guillaume@ubuntu:~/AirBnB$ cat test_save_reload_base_model.py
    #!/usr/bin/python3
    from models import storage
    from models.base_model import BaseModel
    
    all_objs = storage.all()
    print("-- Reloaded objects --")
    for obj_id in all_objs.keys():
        obj = all_objs[obj_id]
        print(obj)
    
    print("-- Create a new object --")
    my_model = BaseModel()
    my_model.name = "My_First_Model"
    my_model.my_number = 89
    my_model.save()
    print(my_model)
    
    guillaume@ubuntu:~/AirBnB$ cat file.json
    cat: file.json: No such file or directory
    guillaume@ubuntu:~/AirBnB$ 
    guillaume@ubuntu:~/AirBnB$ ./test_save_reload_base_model.py
    -- Reloaded objects --
    -- Create a new object --
    [BaseModel] (ee49c413-023a-4b49-bd28-f2936c95460d) {'my_number': 89, 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47381), 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47372), 'name': 'My_First_Model', 'id': 'ee49c413-023a-4b49-bd28-f2936c95460d'}
    guillaume@ubuntu:~/AirBnB$ 
    guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
    {"BaseModel.ee49c413-023a-4b49-bd28-f2936c95460d": {"my_number": 89, "__class__": "BaseModel", "updated_at": "2017-09-28T21:07:25.047381", "created_at": "2017-09-28T21:07:25.047372", "name": "My_First_Model", "id": "ee49c413-023a-4b49-bd28-f2936c95460d"}}
    guillaume@ubuntu:~/AirBnB$
    guillaume@ubuntu:~/AirBnB$ ./test_save_reload_base_model.py
    -- Reloaded objects --
    [BaseModel] (ee49c413-023a-4b49-bd28-f2936c95460d) {'name': 'My_First_Model', 'id': 'ee49c413-023a-4b49-bd28-f2936c95460d', 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47381), 'my_number': 89, 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47372)}
    -- Create a new object --
    [BaseModel] (080cce84-c574-4230-b82a-9acb74ad5e8c) {'name': 'My_First_Model', 'id': '080cce84-c574-4230-b82a-9acb74ad5e8c', 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 51, 973308), 'my_number': 89, 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 51, 973301)}
    guillaume@ubuntu:~/AirBnB$ 
    guillaume@ubuntu:~/AirBnB$ ./test_save_reload_base_model.py
    -- Reloaded objects --
    [BaseModel] (080cce84-c574-4230-b82a-9acb74ad5e8c) {'id': '080cce84-c574-4230-b82a-9acb74ad5e8c', 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 51, 973308), 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 51, 973301), 'name': 'My_First_Model', 'my_number': 89}
    [BaseModel] (ee49c413-023a-4b49-bd28-f2936c95460d) {'id': 'ee49c413-023a-4b49-bd28-f2936c95460d', 'updated_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47381), 'created_at': datetime.datetime(2017, 9, 28, 21, 7, 25, 47372), 'name': 'My_First_Model', 'my_number': 89}
    -- Create a new object --
    [BaseModel] (e79e744a-55d4-45a3-b74a-ca5fae74e0e2) {'id': 'e79e744a-55d4-45a3-b74a-ca5fae74e0e2', 'updated_at': datetime.datetime(2017, 9, 28, 21, 8, 6, 151750), 'created_at': datetime.datetime(2017, 9, 28, 21, 8, 6, 151711), 'name': 'My_First_Model', 'my_number': 89}
    guillaume@ubuntu:~/AirBnB$ 
    guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
    {"BaseModel.e79e744a-55d4-45a3-b74a-ca5fae74e0e2": {"__class__": "BaseModel", "id": "e79e744a-55d4-45a3-b74a-ca5fae74e0e2", "updated_at": "2017-09-28T21:08:06.151750", "created_at": "2017-09-28T21:08:06.151711", "name": "My_First_Model", "my_number": 89}, "BaseModel.080cce84-c574-4230-b82a-9acb74ad5e8c": {"__class__": "BaseModel", "id": "080cce84-c574-4230-b82a-9acb74ad5e8c", "updated_at": "2017-09-28T21:07:51.973308", "created_at": "2017-09-28T21:07:51.973301", "name": "My_First_Model", "my_number": 89}, "BaseModel.ee49c413-023a-4b49-bd28-f2936c95460d": {"__class__": "BaseModel", "id": "ee49c413-023a-4b49-bd28-f2936c95460d", "updated_at": "2017-09-28T21:07:25.047381", "created_at": "2017-09-28T21:07:25.047372", "name": "My_First_Model", "my_number": 89}}
    guillaume@ubuntu:~/AirBnB$

Repo:

  • GitHub repository: AirBnB_clone
  • File: models/engine/file_storage.py, models/engine/__init__.py, models/__init__.py, models/base_model.py, tests/

6. Console 0.0.1

mandatory

Write a program called console.py that contains the entry point of the command interpreter:

  • You must use the module cmd
  • Your class definition must be: class HBNBCommand(cmd.Cmd):
  • Your command interpreter should implement:
    • quit and EOF to exit the program
    • help (this action is provided by default by cmd but you should keep it updated and documented as you work through tasks)
    • a custom prompt: (hbnb)
    • an empty line + ENTER shouldn’t execute anything
  • Your code should not be executed when imported

Warning:

You should end your file with:

if __name__ == '__main__':
    HBNBCommand().cmdloop()

to make your program executable except when imported. Please don’t add anything around - the Checker won’t like it otherwise

    guillaume@ubuntu:~/AirBnB$ ./console.py
    (hbnb) help
    
    Documented commands (type help <topic>):
    ========================================
    EOF  help  quit
    
    (hbnb) 
    (hbnb) help quit
    Quit command to exit the program
    
    (hbnb) 
    (hbnb) 
    (hbnb) quit 
    guillaume@ubuntu:~/AirBnB$

No unittests needed

Repo:

  • GitHub repository: AirBnB_clone
  • File: console.py

7. Console 0.1

mandatory

Update your command interpreter (console.py) to have these commands:

  • create: Creates a new instance of BaseModel, saves it (to the JSON file) and prints the id. Ex: $ create BaseModel
    • If the class name is missing, print ** class name missing ** (ex: $ create)
    • If the class name doesn’t exist, print ** class doesn't exist ** (ex: $ create MyModel)
  • show: Prints the string representation of an instance based on the class name and id. Ex: $ show BaseModel 1234-1234-1234.
    • If the class name is missing, print ** class name missing ** (ex: $ show)
    • If the class name doesn’t exist, print ** class doesn't exist ** (ex: $ show MyModel)
    • If the id is missing, print ** instance id missing ** (ex: $ show BaseModel)
    • If the instance of the class name doesn’t exist for the id, print ** no instance found ** (ex: $ show BaseModel 121212)
  • destroy: Deletes an instance based on the class name and id (save the change into the JSON file). Ex: $ destroy BaseModel 1234-1234-1234.
    • If the class name is missing, print ** class name missing ** (ex: $ destroy)
    • If the class name doesn’t exist, print ** class doesn't exist ** (ex:$ destroy MyModel)
    • If the id is missing, print ** instance id missing ** (ex: $ destroy BaseModel)
    • If the instance of the class name doesn’t exist for the id, print ** no instance found ** (ex: $ destroy BaseModel 121212)
  • all: Prints all string representation of all instances based or not on the class name. Ex: $ all BaseModel or $ all.
    • The printed result must be a list of strings (like the example below)
    • If the class name doesn’t exist, print ** class doesn't exist ** (ex: $ all MyModel)
  • update: Updates an instance based on the class name and id by adding or updating attribute (save the change into the JSON file). Ex: $ update BaseModel 1234-1234-1234 email "aibnb@mail.com".
    • Usage: update <class name> <id> <attribute name> "<attribute value>"
    • Only one attribute can be updated at the time
    • You can assume the attribute name is valid (exists for this model)
    • The attribute value must be casted to the attribute type
    • If the class name is missing, print ** class name missing ** (ex: $ update)
    • If the class name doesn’t exist, print ** class doesn't exist ** (ex: $ update MyModel)
    • If the id is missing, print ** instance id missing ** (ex: $ update BaseModel)
    • If the instance of the class name doesn’t exist for the id, print ** no instance found ** (ex: $ update BaseModel 121212)
    • If the attribute name is missing, print ** attribute name missing ** (ex: $ update BaseModel existing-id)
    • If the value for the attribute name doesn’t exist, print ** value missing ** (ex: $ update BaseModel existing-id first_name)
    • All other arguments should not be used (Ex: $ update BaseModel 1234-1234-1234 email "aibnb@mail.com" first_name "Betty" = $ update BaseModel 1234-1234-1234 email "aibnb@mail.com")
    • id, created_at and updated_at cant’ be updated. You can assume they won’t be passed in the update command
    • Only “simple” arguments can be updated: string, integer and float. You can assume nobody will try to update list of ids or datetime

Let’s add some rules:

  • You can assume arguments are always in the right order
  • Each arguments are separated by a space
  • A string argument with a space must be between double quote
  • The error management starts from the first argument to the last one
    guillaume@ubuntu:~/AirBnB$ ./console.py
    (hbnb) all MyModel
    ** class doesn't exist **
    (hbnb) show BaseModel
    ** instance id missing **
    (hbnb) show BaseModel My_First_Model
    ** no instance found **
    (hbnb) create BaseModel
    49faff9a-6318-451f-87b6-910505c55907
    (hbnb) all BaseModel
    ["[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'id': '49faff9a-6318-451f-87b6-910505c55907', 'updated_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903300)}"]
    (hbnb) show BaseModel 49faff9a-6318-451f-87b6-910505c55907
    [BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'id': '49faff9a-6318-451f-87b6-910505c55907', 'updated_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903300)}
    (hbnb) destroy
    ** class name missing **
    (hbnb) update BaseModel 49faff9a-6318-451f-87b6-910505c55907 first_name "Betty"
    (hbnb) show BaseModel 49faff9a-6318-451f-87b6-910505c55907
    [BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'first_name': 'Betty', 'id': '49faff9a-6318-451f-87b6-910505c55907', 'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'updated_at': datetime.datetime(2017, 10, 2, 3, 11, 3, 49401)}
    (hbnb) create BaseModel
    2dd6ef5c-467c-4f82-9521-a772ea7d84e9
    (hbnb) all BaseModel
    ["[BaseModel] (2dd6ef5c-467c-4f82-9521-a772ea7d84e9) {'id': '2dd6ef5c-467c-4f82-9521-a772ea7d84e9', 'created_at': datetime.datetime(2017, 10, 2, 3, 11, 23, 639717), 'updated_at': datetime.datetime(2017, 10, 2, 3, 11, 23, 639724)}", "[BaseModel] (49faff9a-6318-451f-87b6-910505c55907) {'first_name': 'Betty', 'id': '49faff9a-6318-451f-87b6-910505c55907', 'created_at': datetime.datetime(2017, 10, 2, 3, 10, 25, 903293), 'updated_at': datetime.datetime(2017, 10, 2, 3, 11, 3, 49401)}"]
    (hbnb) destroy BaseModel 49faff9a-6318-451f-87b6-910505c55907
    (hbnb) show BaseModel 49faff9a-6318-451f-87b6-910505c55907
    ** no instance found **
    (hbnb)

No unittests needed

Repo:

  • GitHub repository: AirBnB_clone
  • File: console.py

8. First User

mandatory

Write a class User that inherits from BaseModel:

  • models/user.py
  • Public class attributes:
    • email: string - empty string
    • password: string - empty string
    • first_name: string - empty string
    • last_name: string - empty string

Update FileStorage to manage correctly serialization and deserialization of User.

Update your command interpreter (console.py) to allow show, create, destroy, update and all used with User.

    guillaume@ubuntu:~/AirBnB$ cat test_save_reload_user.py
    #!/usr/bin/python3
    from models import storage
    from models.base_model import BaseModel
    from models.user import User
    
    all_objs = storage.all()
    print("-- Reloaded objects --")
    for obj_id in all_objs.keys():
        obj = all_objs[obj_id]
        print(obj)
    
    print("-- Create a new User --")
    my_user = User()
    my_user.first_name = "Betty"
    my_user.last_name = "Bar"
    my_user.email = "airbnb@mail.com"
    my_user.password = "root"
    my_user.save()
    print(my_user)
    
    print("-- Create a new User 2 --")
    my_user2 = User()
    my_user2.first_name = "John"
    my_user2.email = "airbnb2@mail.com"
    my_user2.password = "root"
    my_user2.save()
    print(my_user2)
    
    guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
    {"BaseModel.2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4": {"__class__": "BaseModel", "id": "2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4", "updated_at": "2017-09-28T21:11:14.333862", "created_at": "2017-09-28T21:11:14.333852"}, "BaseModel.a42ee380-c959-450e-ad29-c840a898cfce": {"__class__": "BaseModel", "id": "a42ee380-c959-450e-ad29-c840a898cfce", "updated_at": "2017-09-28T21:11:15.504296", "created_at": "2017-09-28T21:11:15.504287"}, "BaseModel.af9b4cbd-2ce1-4e6e-8259-f578097dd15f": {"__class__": "BaseModel", "id": "af9b4cbd-2ce1-4e6e-8259-f578097dd15f", "updated_at": "2017-09-28T21:11:12.971544", "created_at": "2017-09-28T21:11:12.971521"}, "BaseModel.38a22b25-ae9c-4fa9-9f94-59b3eb51bfba": {"__class__": "BaseModel", "id": "38a22b25-ae9c-4fa9-9f94-59b3eb51bfba", "updated_at": "2017-09-28T21:11:13.753347", "created_at": "2017-09-28T21:11:13.753337"}, "BaseModel.9bf17966-b092-4996-bd33-26a5353cccb4": {"__class__": "BaseModel", "id": "9bf17966-b092-4996-bd33-26a5353cccb4", "updated_at": "2017-09-28T21:11:14.963058", "created_at": "2017-09-28T21:11:14.963049"}}
    guillaume@ubuntu:~/AirBnB$
    guillaume@ubuntu:~/AirBnB$ ./test_save_reload_user.py
    -- Reloaded objects --
    [BaseModel] (38a22b25-ae9c-4fa9-9f94-59b3eb51bfba) {'id': '38a22b25-ae9c-4fa9-9f94-59b3eb51bfba', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 13, 753337), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 13, 753347)}
    [BaseModel] (9bf17966-b092-4996-bd33-26a5353cccb4) {'id': '9bf17966-b092-4996-bd33-26a5353cccb4', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 963049), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 963058)}
    [BaseModel] (2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4) {'id': '2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 333852), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 333862)}
    [BaseModel] (a42ee380-c959-450e-ad29-c840a898cfce) {'id': 'a42ee380-c959-450e-ad29-c840a898cfce', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 15, 504287), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 15, 504296)}
    [BaseModel] (af9b4cbd-2ce1-4e6e-8259-f578097dd15f) {'id': 'af9b4cbd-2ce1-4e6e-8259-f578097dd15f', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 12, 971521), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 12, 971544)}
    -- Create a new User --
    [User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'id': '38f22813-2753-4d42-b37c-57a17f1e4f88', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848291), 'email': 'airbnb@mail.com', 'first_name': 'Betty', 'last_name': 'Bar', 'password': 'root'}
    -- Create a new User 2 --
    [User] (d0ef8146-4664-4de5-8e89-096d667b728e) {'id': 'd0ef8146-4664-4de5-8e89-096d667b728e', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848280), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848294), 'email': 'airbnb2@mail.com', 'first_name': 'John', 'password': 'root'}
    guillaume@ubuntu:~/AirBnB$
    guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
    {"BaseModel.af9b4cbd-2ce1-4e6e-8259-f578097dd15f": {"id": "af9b4cbd-2ce1-4e6e-8259-f578097dd15f", "updated_at": "2017-09-28T21:11:12.971544", "created_at": "2017-09-28T21:11:12.971521", "__class__": "BaseModel"}, "BaseModel.38a22b25-ae9c-4fa9-9f94-59b3eb51bfba": {"id": "38a22b25-ae9c-4fa9-9f94-59b3eb51bfba", "updated_at": "2017-09-28T21:11:13.753347", "created_at": "2017-09-28T21:11:13.753337", "__class__": "BaseModel"}, "BaseModel.9bf17966-b092-4996-bd33-26a5353cccb4": {"id": "9bf17966-b092-4996-bd33-26a5353cccb4", "updated_at": "2017-09-28T21:11:14.963058", "created_at": "2017-09-28T21:11:14.963049", "__class__": "BaseModel"}, "BaseModel.2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4": {"id": "2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4", "updated_at": "2017-09-28T21:11:14.333862", "created_at": "2017-09-28T21:11:14.333852", "__class__": "BaseModel"}, "BaseModel.a42ee380-c959-450e-ad29-c840a898cfce": {"id": "a42ee380-c959-450e-ad29-c840a898cfce", "updated_at": "2017-09-28T21:11:15.504296", "created_at": "2017-09-28T21:11:15.504287", "__class__": "BaseModel"}, "User.38f22813-2753-4d42-b37c-57a17f1e4f88": {"id": "38f22813-2753-4d42-b37c-57a17f1e4f88", "created_at": "2017-09-28T21:11:42.848279", "updated_at": "2017-09-28T21:11:42.848291", "email": "airbnb@mail.com", "first_name": "Betty", "__class__": "User", "last_name": "Bar", "password": "root"}, "User.d0ef8146-4664-4de5-8e89-096d667b728e": {"id": "d0ef8146-4664-4de5-8e89-096d667b728e", "created_at": "2017-09-28T21:11:42.848280", "updated_at": "2017-09-28T21:11:42.848294", "email": "airbnb_2@mail.com", "first_name": "John", "__class__": "User", "password": "root"}}
    guillaume@ubuntu:~/AirBnB$ 
    guillaume@ubuntu:~/AirBnB$ ./test_save_reload_user.py
    -- Reloaded objects --
    [BaseModel] (af9b4cbd-2ce1-4e6e-8259-f578097dd15f) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 12, 971544), 'id': 'af9b4cbd-2ce1-4e6e-8259-f578097dd15f', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 12, 971521)}
    [BaseModel] (2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 333862), 'id': '2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 333852)}
    [BaseModel] (9bf17966-b092-4996-bd33-26a5353cccb4) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 963058), 'id': '9bf17966-b092-4996-bd33-26a5353cccb4', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 14, 963049)}
    [BaseModel] (a42ee380-c959-450e-ad29-c840a898cfce) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 15, 504296), 'id': 'a42ee380-c959-450e-ad29-c840a898cfce', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 15, 504287)}
    [BaseModel] (38a22b25-ae9c-4fa9-9f94-59b3eb51bfba) {'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 13, 753347), 'id': '38a22b25-ae9c-4fa9-9f94-59b3eb51bfba', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 13, 753337)}
    [User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'password': '63a9f0ea7bb98050796b649e85481845', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'email': 'airbnb@mail.com', 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848291), 'last_name': 'Bar', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88', 'first_name': 'Betty'}
    [User] (d0ef8146-4664-4de5-8e89-096d667b728e) {'password': '63a9f0ea7bb98050796b649e85481845', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848280), 'email': 'airbnb_2@mail.com', 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848294), 'id': 'd0ef8146-4664-4de5-8e89-096d667b728e', 'first_name': 'John'}
    -- Create a new User --
    [User] (246c227a-d5c1-403d-9bc7-6a47bb9f0f68) {'password': 'root', 'created_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611352), 'email': 'airbnb@mail.com', 'updated_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611363), 'last_name': 'Bar', 'id': '246c227a-d5c1-403d-9bc7-6a47bb9f0f68', 'first_name': 'Betty'}
    -- Create a new User 2 --
    [User] (fce12f8a-fdb6-439a-afe8-2881754de71c) {'password': 'root', 'created_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611354), 'email': 'airbnb_2@mail.com', 'updated_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611368), 'id': 'fce12f8a-fdb6-439a-afe8-2881754de71c', 'first_name': 'John'}
    guillaume@ubuntu:~/AirBnB$
    guillaume@ubuntu:~/AirBnB$ cat file.json ; echo ""
    {"BaseModel.af9b4cbd-2ce1-4e6e-8259-f578097dd15f": {"updated_at": "2017-09-28T21:11:12.971544", "__class__": "BaseModel", "id": "af9b4cbd-2ce1-4e6e-8259-f578097dd15f", "created_at": "2017-09-28T21:11:12.971521"}, "User.38f22813-2753-4d42-b37c-57a17f1e4f88": {"password": "63a9f0ea7bb98050796b649e85481845", "created_at": "2017-09-28T21:11:42.848279", "email": "airbnb@mail.com", "id": "38f22813-2753-4d42-b37c-57a17f1e4f88", "last_name": "Bar", "updated_at": "2017-09-28T21:11:42.848291", "first_name": "Betty", "__class__": "User"}, "User.d0ef8146-4664-4de5-8e89-096d667b728e": {"password": "63a9f0ea7bb98050796b649e85481845", "created_at": "2017-09-28T21:11:42.848280", "email": "airbnb_2@mail.com", "id": "d0ef8146-4664-4de5-8e89-096d667b728e", "updated_at": "2017-09-28T21:11:42.848294", "first_name": "John", "__class__": "User"}, "BaseModel.9bf17966-b092-4996-bd33-26a5353cccb4": {"updated_at": "2017-09-28T21:11:14.963058", "__class__": "BaseModel", "id": "9bf17966-b092-4996-bd33-26a5353cccb4", "created_at": "2017-09-28T21:11:14.963049"}, "BaseModel.a42ee380-c959-450e-ad29-c840a898cfce": {"updated_at": "2017-09-28T21:11:15.504296", "__class__": "BaseModel", "id": "a42ee380-c959-450e-ad29-c840a898cfce", "created_at": "2017-09-28T21:11:15.504287"}, "BaseModel.38a22b25-ae9c-4fa9-9f94-59b3eb51bfba": {"updated_at": "2017-09-28T21:11:13.753347", "__class__": "BaseModel", "id": "38a22b25-ae9c-4fa9-9f94-59b3eb51bfba", "created_at": "2017-09-28T21:11:13.753337"}, "BaseModel.2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4": {"updated_at": "2017-09-28T21:11:14.333862", "__class__": "BaseModel", "id": "2bf3ebfd-a220-49ee-9ae6-b01c75f6f6a4", "created_at": "2017-09-28T21:11:14.333852"}, "User.246c227a-d5c1-403d-9bc7-6a47bb9f0f68": {"password": "root", "created_at": "2017-09-28T21:12:19.611352", "email": "airbnb@mail.com", "id": "246c227a-d5c1-403d-9bc7-6a47bb9f0f68", "last_name": "Bar", "updated_at": "2017-09-28T21:12:19.611363", "first_name": "Betty", "__class__": "User"}, "User.fce12f8a-fdb6-439a-afe8-2881754de71c": {"password": "root", "created_at": "2017-09-28T21:12:19.611354", "email": "airbnb_2@mail.com", "id": "fce12f8a-fdb6-439a-afe8-2881754de71c", "updated_at": "2017-09-28T21:12:19.611368", "first_name": "John", "__class__": "User"}}
    guillaume@ubuntu:~/AirBnB$

No unittests needed for the console

Repo:

  • GitHub repository: AirBnB_clone
  • File: models/user.py, models/engine/file_storage.py, console.py, tests/

9. More classes!

mandatory

Write all those classes that inherit from BaseModel:

  • State (models/state.py):
    • Public class attributes:
      • name: string - empty string
  • City (models/city.py):
    • Public class attributes:
      • state_id: string - empty string: it will be the State.id
      • name: string - empty string
  • Amenity (models/amenity.py):
    • Public class attributes:
      • name: string - empty string
  • Place (models/place.py):
    • Public class attributes:
      • city_id: string - empty string: it will be the City.id
      • user_id: string - empty string: it will be the User.id
      • name: string - empty string
      • description: string - empty string
      • number_rooms: integer - 0
      • number_bathrooms: integer - 0
      • max_guest: integer - 0
      • price_by_night: integer - 0
      • latitude: float - 0.0
      • longitude: float - 0.0
      • amenity_ids: list of string - empty list: it will be the list of Amenity.id later
  • Review (models/review.py):
    • Public class attributes:
      • place_id: string - empty string: it will be the Place.id
      • user_id: string - empty string: it will be the User.id
      • text: string - empty string

Repo:

  • GitHub repository: AirBnB_clone
  • File: models/state.py, models/city.py, models/amenity.py, models/place.py, models/review.py, tests/

10. Console 1.0

mandatory

Update FileStorage to manage correctly serialization and deserialization of all our new classes: Place, State, City, Amenity and Review

Update your command interpreter (console.py) to allow those actions: show, create, destroy, update and all with all classes created previously.

Enjoy your first console!

No unittests needed for the console

Repo:

  • GitHub repository: AirBnB_clone
  • File: console.py, models/engine/file_storage.py, tests/

11. All instances by class name

#advanced

Update your command interpreter (console.py) to retrieve all instances of a class by using: <class name>.all().

    guillaume@ubuntu:~/AirBnB$ ./console.py
    (hbnb) User.all()
    [[User] (246c227a-d5c1-403d-9bc7-6a47bb9f0f68) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611352), 'updated_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611363), 'password': '63a9f0ea7bb98050796b649e85481845', 'email': 'airbnb@mail.com', 'id': '246c227a-d5c1-403d-9bc7-6a47bb9f0f68'}, [User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848291), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': 'airbnb@mail.com', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}]
    (hbnb)

No unittests needed

Repo:

  • GitHub repository: AirBnB_clone
  • File: console.py

12. Count instances

#advanced

Update your command interpreter (console.py) to retrieve the number of instances of a class: <class name>.count().

    guillaume@ubuntu:~/AirBnB$ ./console.py
    (hbnb) User.count()
    2
    (hbnb)

No unittests needed

Repo:

  • GitHub repository: AirBnB_clone
  • File: console.py

13. Show

#advanced

Update your command interpreter (console.py) to retrieve an instance based on its ID: <class name>.show(<id>).

Errors management must be the same as previously.

    guillaume@ubuntu:~/AirBnB$ ./console.py
    (hbnb) User.show("246c227a-d5c1-403d-9bc7-6a47bb9f0f68")
    [User] (246c227a-d5c1-403d-9bc7-6a47bb9f0f68) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611352), 'updated_at': datetime.datetime(2017, 9, 28, 21, 12, 19, 611363), 'password': '63a9f0ea7bb98050796b649e85481845', 'email': 'airbnb@mail.com', 'id': '246c227a-d5c1-403d-9bc7-6a47bb9f0f68'}
    (hbnb) User.show("Bar")
    ** no instance found **
    (hbnb)

No unittests needed

Repo:

  • GitHub repository: AirBnB_clone
  • File: console.py

14. Destroy

#advanced

Update your command interpreter (console.py) to destroy an instance based on his ID: <class name>.destroy(<id>).

Errors management must be the same as previously.

    guillaume@ubuntu:~/AirBnB$ ./console.py
    (hbnb) User.count()
    2
    (hbnb) User.destroy("246c227a-d5c1-403d-9bc7-6a47bb9f0f68")
    (hbnb) User.count()
    1
    (hbnb) User.destroy("Bar")
    ** no instance found **
    (hbnb)

No unittests needed

Repo:

  • GitHub repository: AirBnB_clone
  • File: console.py

15. Update

#advanced

Update your command interpreter (console.py) to update an instance based on his ID: <class name>.update(<id>, <attribute name>, <attribute value>).

Errors management must be the same as previously.

    guillaume@ubuntu:~/AirBnB$ ./console.py
    (hbnb) User.show("38f22813-2753-4d42-b37c-57a17f1e4f88")
    [User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'first_name': 'Betty', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848291), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': 'airbnb@mail.com', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}
    (hbnb)
    (hbnb) User.update("38f22813-2753-4d42-b37c-57a17f1e4f88", "first_name", "John")
    (hbnb) User.update("38f22813-2753-4d42-b37c-57a17f1e4f88", "age", 89)
    (hbnb)
    (hbnb) User.show("38f22813-2753-4d42-b37c-57a17f1e4f88")
    [User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'age': 89, 'first_name': 'John', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 15, 32, 299055), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': 'airbnb@mail.com', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}
    (hbnb)

No unittests needed

Repo:

  • GitHub repository: AirBnB_clone
  • File: console.py

16. Update from dictionary

#advanced

Update your command interpreter (console.py) to update an instance based on his ID with a dictionary: <class name>.update(<id>, <dictionary representation>).

Errors management must be the same as previously.

    guillaume@ubuntu:~/AirBnB$ ./console.py
    (hbnb) User.show("38f22813-2753-4d42-b37c-57a17f1e4f88")
    [User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'age': 23, 'first_name': 'Bob', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 15, 32, 299055), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': 'airbnb@mail.com', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}
    (hbnb) 
    (hbnb) User.update("38f22813-2753-4d42-b37c-57a17f1e4f88", {'first_name': "John", "age": 89})
    (hbnb) 
    (hbnb) User.show("38f22813-2753-4d42-b37c-57a17f1e4f88")
    [User] (38f22813-2753-4d42-b37c-57a17f1e4f88) {'age': 89, 'first_name': 'John', 'last_name': 'Bar', 'created_at': datetime.datetime(2017, 9, 28, 21, 11, 42, 848279), 'updated_at': datetime.datetime(2017, 9, 28, 21, 17, 10, 788143), 'password': 'b9be11166d72e9e3ae7fd407165e4bd2', 'email': 'airbnb@mail.com', 'id': '38f22813-2753-4d42-b37c-57a17f1e4f88'}
    (hbnb)

No unittests needed

Repo:

  • GitHub repository: AirBnB_clone
  • File: console.py

17. Unittests for the Console!

#advanced

Write all unittests for console.py, all features!

For testing the console, you should “intercept” STDOUT of it, we highly recommend you to use:

    with patch('sys.stdout', new=StringIO()) as f:
        HBNBCommand().onecmd("help show")

Otherwise, you will have to re-write the console by replacing precmd by default.

Repo:

  • GitHub repository: AirBnB_clone
  • File: tests/test_console.py

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