FastAPI Simple CRUD Generator

Repository

• GITHUB

Installation

pip install fastapi-simple-crud

Description

A package to generate CRUD routers and API in a very simple way. Based on SQLAlchemy asynchronous operation and schema.

Changelogs

• v0.0
  • First Upload
• v0.1:
  • Added ExtendedRouter
  • Bugs fix
  • v0.1.4 :
    • using disable_crud for both SimpleRouter() and ExtendedRouter() (previously disable_simple_crud and disable_extended_crud arguments)
  • v0.1.5 :
    • Auto Generated PydanticModel from both SimpleRouter() and ExtendedRouter() be accessed from their object
  • v0.1.6 :
    • RouterMap.update_map() can be used to update ExtendedRouter()

How to use ?

from fastapi import FastAPI
from sqlalchemy import Column, ForeignKey, Integer, String
from sqlalchemy.orm import sessionmaker, relationship
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine

from fastapi_simple_crud import RouterMap

engine = create_async_engine("sqlite+aiosqlite:///./test.db", echo=True, future=True)
async_session = sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
Base = declarative_base()

async def get_session() -> AsyncSession:
    async with async_session() as session:
        yield session

class Country(Base):
    __tablename__ = "country"
    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
    name = Column(String(100), nullable=False)

class President(Base):
    __tablename__ = "president"
    id = Column(Integer, primary_key=True, index=True)
    name = Column(String, nullable=False)
    country_id = Column(Integer, ForeignKey("country.id"))
    country = relationship("Country")

class People(Base):
    __tablename__ = "people"
    id = Column(Integer, primary_key=True, index=True)
    name = Column(String, nullable=False)
    age = Column(Integer)
    country_id = Column(Integer, ForeignKey("country.id"))
    country = relationship("Country")

app = FastAPI()

@app.on_event("startup")
async def startup():
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)


## ULTRA SIMPLE OH MY GOD!

MyMap = RouterMap.create_router_map_from_base(base=Base)

RouterMap.generate(app, get_session)

Results

• your endpoints
  • 
• your pydantic schema
  • 

Example 1b : Too few for you? Relax. We have the Extended Version

simply set the extend parameter to True then you got the fully extended version

## ULTRA SIMPLE OH MY GOD!

RouterMap.create_router_map_from_base(Base, base_prefix="/v1", extend=True)

RouterMap.generate(app, get_session)

• your extended endpoints
  • 

---

Using RouterMap superclass

Simple usage

class MyMap(RouterMap):
    country = SimpleRouter(Country)
    president = SimpleRouter(President)
    people = ExtendedRouter(People)

Additional usage

from fastapi_simple_crud import SimpleCRUDGenerator, RouterMap, SimpleRouter, SimpleEndpoint

## ULTRA SIMPLE OH MY GOD!

class MyPresidentPydantic(BaseModel):
    name: int

class MyMap(RouterMap):
    country = SimpleRouter(Country, prefix="/v1/country")
    president = SimpleRouter(President, prefix="/v1/president",
        crud_update=None,
        crud_create=SimpleEndpoint(pydantic_model=MyPresidentPydantic),
        crud_read=SimpleEndpoint("/custom_read"))

RouterMap.generate(app, get_session)

• This example show how to use RouterMap as a superclass
• You could disable the API generation by simply passing between these keyword arguments to None in the SimpleRouter definition:
  • crud_create
  • crud_read
  • crud_update
  • crud_delete
  • disable_crud (set this to True this will forcely disable all API generation)
• Only your defined router mapping inside you router map (in above example is MyMap class) will be generated. From the example, People router is not exist.
• SimpleEndpoint() refers to your HTTP method definition (GET/POST/PUT/DELETE) in the API decorator (ex: @router.get(), etc.)

RouterMap with ExtendedRouter()

from fastapi_simple_crud import SimpleCRUDGenerator, RouterMap, ExtendedRouter, SimpleEndpoint

## ULTRA SIMPLE OH MY GOD!

class MyPresidentPydantic(BaseModel):
    name: int

class MyMap(RouterMap):
    country = ExtendedRouter(Country, prefix="/v1/country")
    president = ExtendedRouter(President, prefix="/v1/president",
        read_one=None,
        read_many=SimpleEndpoint("/custom_read")),
        update_one=SimpleEndpoint(pydantic_model=MyPresidentPydantic)

RouterMap.generate(app, get_session)

• You could disable the API generation by simply passing between these keyword arguments to None in the ExtendedRouter definition:
  • create_one
  • create_many
  • read_one
  • read_many
  • update_one
  • update_many
  • delete_one
  • delete_many
  • disable_crud (set this to True this will forcely disable all API generation)

---

Add Your Custom API

from fastapi import Depends
from sqlalchemy import select
from fastapi_simple_crud import SimpleCRUDGenerator, RouterMap, SimpleRouter, SimpleEndpoint

## ULTRA SIMPLE OH MY GOD!

class MyPresidentPydantic(BaseModel):
    name: int

class MyMap(RouterMap):
    country = SimpleRouter(Country, prefix="/v1/country", crud_read=None)
    president = SimpleRouter(President, prefix="/v1/president")

@MyMap.country.get("/custom_read")
async def get_country(id: int, session: AsyncSession = Depends(get_session)):
    query = select(Country).where(Country.id==id)
    data = await session.execute(query)
    data = data.scalars().first()
    return data

RouterMap.generate(app, get_session)

• You could use your router from the your router map as shown above

---

Disabling Some Routers

from fastapi_simple_crud import SimpleCRUDGenerator, RouterMap, SimpleRouter, SimpleEndpoint

## ULTRA SIMPLE OH MY GOD!

MyMap = RouterMap.create_router_map_from_base(base=Base)

## you want to remove people from autogeneration

class NewMap(MyMap):
    people = SimpleRouter(People, disable_crud=True)

RouterMap.generate(app, get_session)

or inherit from the RouterMap

class NewMap(RouterMap):
    people = SimpleRouter(People, disable_crud=True)

or simply update from the RouterMap

people = SimpleRouter(People, disable_crud=True)
RouterMap.update_map(people)

or from the MyMap

MyMap.update_map(people)

---

Change Router Type

You can override ExtendedRouter with SimpleRouter and vice versa.

class NewMap(RouterMap):
    people = SimpleRouter(People)

class NewMap2(RouterMap):
    people = ExtendedRouter(People)

---

Add your custom API from RouterMap.create_router_map_from_base()

from fastapi import Depends
from sqlalchemy import select
from fastapi_simple_crud import SimpleCRUDGenerator, RouterMap, SimpleRouter, SimpleEndpoint

class Country(Base):
    __tablename__ = "country"
    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
    name = Column(String(100), nullable=False)

## ULTRA SIMPLE OH MY GOD!

MyMap = RouterMap.create_router_map_from_base(base=Base)

## use your tablename to get the router attribute from the created router map
## RouterMap in default will automatically mapped your router with its tablename

@MyMap.country.get("/custom_read")
async def get_country(id: int, session: AsyncSession = Depends(get_session)):
    query = select(Country).where(Country.id==id)
    data = await session.execute(query)
    data = data.scalars().first()
    return data

RouterMap.generate(app, get_session)

• Use your tablename to get the router attribute from the created router map (in above is MyMap)
• RouterMap in default will automatically mapped your router with its tablename (in above Country tablename is country)

---

Want to use your generated pydantic?

class MyMap(RouterMap):
    country = SimpleRouter(Country)
    president = SimpleRouter(President)
    people = ExtendedRouter(People)

## here you go
countryCreateOnePydanticModel = MyMap.country.create_one.pydanticModel

---

Want to generate your own pydantic from SQLAlchemy schema?

for example we have this class

class People(Base):
    __tablename__ = "people"
    id = Column(Integer, primary_key=True, index=True)
    name = Column(String, nullable=False)
    age = Column(Integer)
    country_id = Column(Integer, ForeignKey("country.id"))
    country = relationship("Country")
    isAlive = Column(Boolean)

then simply put in to with generate_pydantic_model()

from fastapi import Query
from fastapi_simple_crud.dependencies.utils import generate_pydantic_model

myPeoplePydantic = generate_pydantic_model(People, modelName="myPeoplePydantic")

or with some params..

myPeoplePydantic = generate_pydantic_model(
            classModel=People,
            modelName="myPeoplePydantic",
            exclude_attributes=["id"],
            include_attributes_default={"isAlive": True},
            include_attributes_paramsType={"isAlive": Query},
        )

the code above will generate People pydantic model without id attribute

the available params are:

• classModel >> your SQLAlchemy Model Schema Class
• modelName >> your pydantic model name
• exclude_attributes >> put the attributes you dont want inside your pydanticModel (it will copy all relatied attributes from the SQLAlchemy schema)
• include_attributes_default >> set your attributes default params
• include_attributes_paramsType >> set your attributes default params
• uniform_attributes_default >> override all default value to uniform
• uniform_attributes_paramsType >> override all params type to uniform