example: route, controller, model

server/controllers/controller.js

@@ -0,0 +1,18 @@
+import Example from './../models/model.js';
+
+const getExamples = (request, response) => {
+  // what is .find() ???   --->   https://mongoosejs.com/docs/queries.html
+  Example.find((error, allExamples) => {
+    if (error) {
+      console.log(`❌ ${error}`);
+      return response.status(404).json(error); // 404 not found + catched error -> send to client
+    }
+
+    // more about response status codes   --->   https://restapitutorial.com/httpstatuscodes.html
+
+    console.log('✅ -FOUND- :', allExamples);
+    return response.status(200).json(allExamples); // 200 ok + array of couments -> send to client
+  });
+};
+
+export default getExamples;

server/index.js

@@ -2,6 +2,9 @@ import mongoose from 'mongoose';
 import express from 'express';
 import dotenv from 'dotenv';
 import cors from 'cors';
+// import IMPORTED_ROUTES from './routes/route.js';
+// un-comment this ^ ^ ^ to use imported route(s)
+// doing this will link this following files:   index.js -> route.js -> controller.js -> model.js
 
 // initialize app
 const app = express();
@@ -23,8 +26,9 @@ mongoose.connection.on('error', (err) => console.log(`❌ MongoDB: ${err}`));
 
 // middlewares
 app.use(express.json()); // body parser
-app.use(cors()); // enables requests
+app.use(cors()); // enables http requests
 
 // routes
 app.get('/', (req, res) => res.send('Hello World - Express.js'));
 // app.use('/', IMPORTED_ROUTES);
+// un-comment this ^ ^ ^ to use imported route(s)

server/models/model.js

@@ -0,0 +1,14 @@
+import mongoose from 'mongoose';
+
+const instance = new mongoose.Schema({
+  /*
+    name = property of document object
+    String = type of value   --->   https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures
+  */
+  name: String,
+});
+
+// document = model name   --->   https://mongoosejs.com/docs/guide.html
+const document = 'example';
+
+export default mongoose.model(document, instance);

server/routes/route.js

@@ -0,0 +1,13 @@
+import express from 'express';
+import getExamples from './../controllers/controller.js'; // import request & response function
+const router = express.Router(); // initialize router
+
+/*
+  1st param = extended path location
+  2nd param = request & response function
+
+  current link: http://localhost:8080/examples
+*/
+router.get('/examples', getExamples);
+
+export default router;