graphql-mongodb-loader

This repository and the following readme files are modified from @entria/graphql-mongoose-loader to support Mongodb native drive.

Install

``` npm i graphql-mongodb-loader --save yarn add graphql-mongodb-loader ```

Mongoose Dataloader Batch

Add batch to your GraphQL resolvers/loaders Create a Dataloader for it ```jsx import { mongodbLoader } from 'graphql-mongodb-loader'; export const getLoader = () => new DataLoader(ids => mongodbLoader(db.collection('User'), ids)); ```

Connection from Mongodb Cursor

Create a connection from mongodb cursor ```jsx import { connectionFromMongoCursor } from 'graphql-mongodb-loader'; export const loadUsers = async (context: GraphQLContext, args: ConnectionArguments) => { const where = args.search

? {

name: {

$regex: new RegExp(`^${args.search}`, 'ig'),

},

}

: {};

const users = db.collection('User').find(where, { id: 1 }).sort({

createdAt: -1,

}); return connectionFromMongoCursor({

cursor: users,

context,

args,

loader: load,

}); }; ```

Connection from Mongodb Aggregate

Create a connection from mongodb aggregate ```jsx import { connectionFromMongoAggregate } from 'graphql-mongodb-loader'; export const loadUsersThatHaveGroup = async (context: GraphQLContext, args: ConnectionArguments) => { const aggregate = GroupModel.aggregate(

{

$lookup: {

from: 'User',

localField: 'users',

foreignField: '_id',

as: 'users',

},

},

{

// remove empty groups

$match: { users: { $exists: true, $ne: [] } },

},

{

// promote each user to a new document

$unwind: '$users',

},

{

$sort: {

_id: 1,

},

},

{

$replaceRoot: { newRoot: '$users' },

},

); return connectionFromMongoAggregate({

aggregate,

context,

args,

loader: load,

}); }; ```