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Contentstack DataSync MongoDB SDK

Contentstack DataSync provides MongoDB SDK to query applications that have locally stored contents in mongodb. Given below is the detailed guide and helpful resources to get started.

Prerequisite

• Nodejs, v8+
• MongoDB, v3.6 or higher
• You should have the data synced through Contentstack DataSync

Note For optimal performance, we recommend that you add indexes on the following keys of your collections

• _content_type_uid: 1
• uid: 1
• locale: 1

• updated_at: -1

Configuration

Property	Type	Default value	Description
dbName	string	contentstack-persistent-db	Optional The MongoDB database name
collection	string	contents	Optional MongoDB database's collection names
url	string	mongodb://localhost:27017	Optional. The MongoDB connection URI
limit	number	100	Optional. Caps the total no of objects returned in a single call
skip	number	0	Optional. Number of objects skipped before the result is returned
indexes	object	see config below	Optional. Option to create db indexes via configuration
projections	object	see config below	Optional. Mongodb projections. Keys provided here would be displayed/filtered out when fetching the result
options	object	see config below	Optional. MongoDB connection options Ref. for more info
referenceDepth	number	2	Optional The default nested-reference-field depth that'd be considered when calling .includeReferences(). This can be overridden by passing a numerical argument to .includeReferences(4)

Config Overview

Here's an overview of the SDK's configurable properties

{
  contentStore: {
    collection: {
      asset: 'contents',
      entry: 'contents',
      schema: 'content_types',
    },
    dbName: 'contentstack-db',
    indexes: {
      _content_type_uid: 1,
      locale: 1,
      uid: 1,
      updated_at: -1,
    },
    limit: 100,
    locale: 'en-us',
    // http://mongodb.github.io/node-mongodb-native/3.1/api/MongoClient.html
    options: {
      autoReconnect: true,
      connectTimeoutMS: 15000,
      keepAlive: true,
      noDelay: true,
      reconnectInterval: 1000,
      reconnectTries: 20,
      useNewUrlParser: true,
    },
    projections: {
      _content_type_uid: 0,
      _id: 0,
    },
    referenceDepth: 2,
    skip: 0,
    url: 'mongodb://localhost:27017',
  },
}

Sample SDK Query

Here's a sample SDK query to get started.

Learn more on how to query using datasync-mongodb-sdk here.

import { Contentstack } from 'datasync-mongodb-sdk'
const Stack = Contentstack.Stack(config)

Stack.connect()
  .then(() => {
    return Stack.contentType('blog')
      .entries()
      .language('en-gb') // Optional. If not provided, defaults to en-us
      .include(['authors'])
      .includeCount()
      .includeContentType()
      .queryReferences({'authors.firstName': 'R.R. Martin'})
      .then((result) => {
        // Your result would be
        // {
        //   entries: [...], // All entries, who's first name is R.R. Martin
        //   content_type_uid: 'blog',
        //   locale: 'es-es',
        //   content_type: {...}, // Blog content type's schema
        //   count: 3, // Total count of blog content type
        // }
      })
  })
  .catch((error) => {
    // handle errors..
  })

Important: You need to call .connect(), to initiate SDK queries!

Once you have initialized the SDK, you can start querying on mongodb

Querying

• Notes

  • By default, 'content_type_uid' and 'locale' keys as part of the response.
  • If .language() is not provided, then the 1st language, provided in config.defaultLocale would be considered.
  • If querying for a single entry/asset (using .entry() OR .findOne()), the result will be an object i.e. { entry: {} }, if the entry or asset is not found, { entry: null } will be returned.
  • Querying multiple entries, would return { entries: [ {...} ] }.
  • By default, all entry responses would include their referred assets. If .excludeReferences() is called, no references (including assets) would not be returned in the response.

• Query a single entry

// Sample 1. Returns the 1st entry that matches query filters
Stack.contentType('blog')
  .entry() // OR .asset()
  .find()
  .then((result) => {
    // Response
    // result = {
    //   entry: any | null,
    //   content_type_uid: string,
    //   locale: string,
    // }
  })
  .catch(reject)

// Sample 2. Returns the 1st entry that matches query filters
Stack.contentType('blogs')
  .entries() // for .assets() 
  .findOne()
  .then((result) => {
    // Response
    // result = {
    //   entry: any | null,
    //   content_type_uid: string,
    //   locale: string,
    // }
  })
  .catch(reject)

• Querying a set of entries, assets or content types

Stack.contentType('blog')
  .entries() // for .assets() 
  .includeCount()
  .find()
  .then((result) => {
    // Response
    // result = {
    //   entry: any | null,
    //   content_type_uid: string,
    //   count: number,
    //   locale: string,
    // }
  })
  .catch(reject)

Advanced Queries

In order to learn more about advance queries please refer the API documentation, here.

Further Reading

• Getting started with Contentstack DataSync
• Contentstack DataSync doc lists the configuration for different modules

Support and Feature requests

If you have any issues working with the library, please file an issue here at Github.

You can send us an e-mail at support@contentstack.com if you have any support or feature requests. Our support team is available 24/7 on the intercom. You can always get in touch and give us an opportunity to serve you better!

License

This repository is published under the MIT license.