implemented product lookup by name

models/ProductModel.js

@@ -23,4 +23,16 @@ module.exports = class ProductModel {
             throw new Error(e);
         }
     }
+
+    async findOneByName(name) {
+        try {
+            const q = `SELECT * FROM product WHERE name = $1;`;
+            const filter = [name];
+            const result = await db.query(q, filter);
+            if (result.rows.length) return result.rows[0];
+            return null;
+        } catch(e) {
+            throw new Error(e);
+        }
+    }
 }

routes/product.js

@@ -6,12 +6,23 @@ module.exports = (app) => {
     app.use('/api/product', router);
 
     router.get('/', async (req, res, next) => {
+        const { name } = req.query;
+
+        if (name) {
+            try {
+                const response = await ProductServiceInstance.getOneByName(name);
+                res.status(200).send(response);
+            } catch(e) {
+                next(e);
+            }
+        } else {
             try {
                 const response = await ProductServiceInstance.getAll();
                 res.status(200).send(response);
             } catch(e) {
                 next(e);
             }
+        }
     })
 
     router.get('/:productId', async(req, res, next) => {

services/ProductService.js

@@ -22,4 +22,14 @@ module.exports = class ProductService {
             throw new Error(e);
         }
     }
+
+    async getOneByName(name) {
+        try {
+            const result = await ProductInstance.findOneByName(name);
+            if (!result) throw createError(404, 'No products found.');
+            return result;
+        } catch(e) {
+            throw new Error(e);
+        }
+    }
 }