Installation

npm install feathers-dataloader --save

Documentation

TLDR

Promise.all([app.service('posts').get(1),app.service('posts').get(2),app.service('posts').get(3)]);

app.service('posts').find({query:{id:{$in:[1,2,3]}}});

constloader=newAppLoader({app:context.app});Promise.all([loader.service('posts').load(1),loader.service('posts').load(2),loader.service('posts').load(3)]);

app.service('posts').find({query:{id:{$in:[1,2,3]}}});

Quick Start

const{ AppLoader}=require('feathers-dataloader');// See Guide for more information about how to better pass// loaders from service to service.constinitializeLoader=context=>{if(context.params.loader){returncontext;}context.params.loader=newAppLoader({app:context.app});returncontext;}// Use this app hook to ensure that a loader is always configured in// your service hooks. You can now access context.params.loader in any hook.app.hooks({before:{all:[initializeLoader]}})// Loaders are most commonly used in resolvers like@feathersjs/schema,// withResults, or fastJoin. See the Guide section for more// information and common usecases.// Pass the loader to any and all service/loader calls. This maximizes// performance by allowing the loader to reuse its cache and// batching mechanism as much as possible.const{ resolveResult, resolve}=require('@feathersjs/schema');constpostResultsResolver=resolve({properties:{user:async(value,post,context)=>{const{ loader}=context.params;returnawaitloader.service('users').load(post.userId,{ loader});},category:async(value,post,context)=>{const{ loader}=context.params;returnawaitloader.service('categories').key('name').load(post.categoryName,{ loader});},tags:async(value,post,context)=>{const{ loader}=context.params;returnawaitloader.service('tags').load(post.tagIds,{ loader});},comments:async(value,post,context)=>{const{ loader}=context.params;returnawaitloader.service('comments').multi('postId').load(post.id,{ loader});}}});app.service('posts').hooks({after:{all:[resolveResult(postResultsResolver)]}});

Running Tests

License