GraphQL Mongoose Loader helpers
npm install @entria/graphql-mongoose-loader
npm i @entria/graphql-mongoose-loader --save
yarn add @entria/graphql-mongoose-loader
`Mongoose Dataloader Batch
Add batch to your GraphQL resolvers/loaders
Define a mongoose schema for your model
`jsx
import mongoose from 'mongoose';const Schema = new mongoose.Schema(
{
name: {
type: String,
},
email: {
type: String,
required: true,
index: true,
},
password: {
type: String,
hidden: true,
},
},
{
collection: 'User',
},
);
export default mongoose.model('User', Schema);
`Create a Dataloader for it
`jsx
import { mongooseLoader } from '@entria/graphql-mongoose-loader';
import UserModel from './User';export const getLoader = () => new DataLoader(ids => mongooseLoader(UserModel, ids));
`Connection from Mongoose Cursor
Create a connection from mongoose cursor
`jsx
import { connectionFromMongoCursor } from '@entria/graphql-mongoose-loader';export const loadUsers = async (context: GraphQLContext, args: ConnectionArguments) => {
const where = args.search
? {
name: {
$regex: new RegExp(
^${args.search}, 'ig'),
},
}
: {};
const users = UserModel.find(where, { _id: 1 }).sort({
createdAt: -1,
}); return connectionFromMongoCursor({
cursor: users,
context,
args,
loader: load,
});
};
`Connection from Mongoose Aggregate
Create a connection from mongoose aggregate
`jsx
import { connectionFromMongoAggregate } from '@entria/graphql-mongoose-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,
});
};
``