Controllers + Services

1. Create services/category.services.js

   See the Pen 25 - Catgegory.services__mongoDb_web-server by Andrii (@imitator) on CodePen.

   In this case const { Category } = require('../models'); imported only once.

2. Grab all category services to one object in services/index.js

   See the Pen 26 - Category-services__index.js by Andrii (@imitator) on CodePen.

3. Refactor controllers due to changes:
   • Remove line: const { Category } = require('../../models'); and import service
   • Use service in every controller in front of model
   • POST

     • See the Pen 27 - POST ctrl acc. to services by Andrii (@imitator) on CodePen.

   • getAll

     • See the Pen 28 - GET_getAll_ ctrl acc. to services by Andrii (@imitator) on CodePen.

   • getItem by id

     • See the Pen 29 - GET__getById__ ctrl acc. to services by Andrii (@imitator) on CodePen.

   • UPDATE

     • See the Pen 27 - PUT__ctrl acc. to services by Andrii (@imitator) on CodePen.

   • DELETE

     • See the Pen 31 - DELETE__ctrl acc. to services by Andrii (@imitator) on CodePen.

       P.S. In DELETE controller remember about second way of response.