feat(Rating):Pagination for article ratings

Paginate article ratings

[Delivers #166841018]

src/controllers/ratingController.js

@@ -52,5 +52,50 @@ class RatingController {
       });
     }
   }
+
+/**
+ *
+ * @returns { object } res
+ * @description - paginate article ratings
+ * @static
+ * @param {*} req
+ * @param {*} res
+ * @memberof RatingController
+ */
+static async getAllArticlesRating(req, res){
+    const {article} = res.locals;
+    const articleId = article.id
+    try{
+      let offset = 0;
+      const { currentPage, limit } = req.query; // page number
+      const defaultLimit = limit || 3; // number of records per page
+      const defaultPage = currentPage || 1;
+
+      const { count, rows: rating } = await Rating.findAndCountAll({
+        where: { articleId },
+        raw: true,
+        attributes: { exclude: ['id', 'updatedAt', 'articleId']},
+        limit: defaultLimit,
+        offset
+      });
+
+      const pages = Math.ceil(count / limit) || 1;
+      offset = limit * (defaultPage - 1);
+
+      return res.status(200).json({
+        status: 200,
+        message: 'All Ratings fetched successfully',
+        article,
+        rating,
+        pages
+      });
+
+    } catch(err){
+      return res.status(500).json({
+        status: 500,
+        message: 'Internal server error'
+      })
+    }
+  }
 }
 export default RatingController;

src/db/models/article.js

@@ -38,6 +38,11 @@ module.exports = (sequelize, DataTypes) => {
       onDelete: 'CASCADE',
       onUpdate: 'CASCADE'
     });
+    Article.hasMany(models.Rating, {
+      foreignKey: 'articleId',
+      onDelete: 'CASCADE',
+      onUpdate: 'CASCADE'
+    });
   };
   return Article;
 };

src/routes/index.js

@@ -16,7 +16,6 @@ router.use('/api/v1/user', userRoute);
 router.use('/api/v1/', articleRoute);
 router.use('/api/v1', userRoute);
 router.use('/api/v1/articles', commentRoute);
-router.use('/api/v1/article', commentRoute);
 router.use('/api/v1', ratingRoute);
 
 export default router;

src/routes/ratingRoute.js

@@ -8,5 +8,6 @@ import ratingChecker from '../middleware/validators/ratingValidation';
 const router = express.Router();
 
 router.post('/articles/rate/:slug', verify, ratingChecker, findItem.findArticle, RatingController.rateArticle);
+router.get('/articles/rating/:slug', verify, findItem.findArticle, RatingController.getAllArticlesRating);
 
 export default router;

test/rating.test.js

@@ -95,4 +95,22 @@ describe('RatingController', () => {
           });
       });
   });
+  it('should get all ratings for a particular article', (done) => {
+    chai.request(app).post('/api/v1/auth/login')
+      .send(user)
+      .end((err, res) => {
+        testToken = res.body.token;
+        chai.request(app).get('/api/v1/articles/rating/article?page=3&limit=2')
+          .set('token', testToken)
+          .end((err, res) => {
+            res.should.have.status(200);
+            expect(res.body).to.have.property('article');
+            expect(res.body.rating[0]).to.have.property('value');
+            expect(res.body.rating[0]).to.have.property('createdAt');
+            expect(res.body.rating[0]).to.have.property('userId');
+            expect(res.body.message).equal('All Ratings fetched successfully');
+            done();
+          });
+      });
+  });
 });