Last Sync: 2022-08-30 11:00:05

Programming_Languages/NodeJS/REST_APIs/05__Integrating_the_database.md

@@ -8,3 +8,71 @@ tags: [backend, node-js, REST, APIs, mongo-db]
 # Creating a RESTful API: Integrating the database
 
 So far we have set up the application and an `/api/courses` route which handles requests for RESTful API operations on a local array of course objects. We now want to have the endpoints operate on a MongoDB `courses` collection rather than the array.
+
+## Set-up
+
+We will follow the routine for establishing a MongoDB instance as detailed in [my notes](/Databases/MongoDB/Connect_to_database.md) on Mongo:
+
+- [Create MongoDB database](/Databases/MongoDB/Create_database.md)
+- [Connect to MongoDB database](/Databases/MongoDB/Connect_to_database.md)
+
+Our `index.js` now looks like the following:
+
+```js
+// index.js
+
+// Connect to database
+mongoose
+  .connect("mongodb://127.0.0.1/playground")
+  .then(() => console.log("Connected to MongoDB"))
+  .catch((err) => console.error(err));
+
+app.use(express.json());
+
+// Link to `courses` route which contains our REST request handlers for this part of the API
+app.use("/api/courses", courses);
+```
+
+## Integrating Mongo with our our `courses` module
+
+### Create the schema
+
+Now we go the router module for `courses` and start to use Mongoose, defining our `Course` schema:
+
+```diff
+// index.js
+
+// Connect to database
+mongoose
+  .connect("mongodb://127.0.0.1/playground")
+  .then(() => console.log("Connected to MongoDB"))
+  .catch((err) => console.error(err));
+
+app.use(express.json());
+
+// Link to `courses` route which contains our REST request handlers for this part of the API
+app.use("/api/courses", courses);
+
++ const courseSchema = new mongoose.Schema({
++  name: {type: String, required: true, minlength: 5, maxlength: 255},
++  author: String,
++  tags: [String],
++  data: {type: Date, default: Date.now}, // if unspecified, entry will default to current date
++  isPublished: Boolean,
++ });
+
+```
+
+### Create a model
+
+```diff
+const courseSchema = new mongoose.Schema({
+  name: {type: String, required: true, minlength: 5, maxlength: 255},
+  author: String,
+  tags: [String],
+  data: {type: Date, default: Date.now}, // if unspecified, entry will default to current date
+  isPublished: Boolean,
+ });
+
++ const Course = new mongoose.model('Course', courseSchema);
+```