MERN stack CRUD added

Author: epythonlab

nodejs/database/db.js

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+/*
+  SETTING UP MongoDB DATABASE
+  - create a directory called database
+  - create db.js inside database directory
+  - setting up the database server as below
+*/
+module.exports = {
+  // change the host name when deploying
+  db: 'mongodb://0.0.0.0:27017/sagedb'
+}
+
+// in this you have defined the MongoDB database and named it
+// sagedb
+// CONFIGURE SERVER IN THE ROOT DIRECTORY
+ // - server.js
+
+/* CREATE NEW DIRECTORY name it as models
+ - create a new model file: Applicant.js
+
+ */

nodejs/models/Applicant.js

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+/*
+  DEFINE Mongoose SCHEMA:
+  - create the schema for interacting with MongoDB schema
+  - models directory contains schema related files
+  INSTALL:
+    - npm install body-parser cors mongoose
+    - npm i -D nodemon
+
+   - you can also install nodemon as dev to
+    automate the server restarting process
+    while modifying the server code
+
+*/
+// import mongoose module
+/* Mongoose is an object data modeling(ODM) library for
+ - MongoDB and Node.js
+ - it manages relationships between data,provides schema validation,
+  - and is used to translate between objects in code and
+  the representation of those objects in MongoDB.
+*/
+const mongoose = require('mongoose');
+/*
+  A schema is a JSON object that defines the structure
+  and contents of your data
+*/
+const Schema = mongoose.Schema;
+
+let applicantSchema = new Schema({
+  first_name: {
+    type: String
+  },
+  last_name: {
+    type: String
+  },
+  gender: {
+    type: String
+  },
+  email: {
+    type: String,
+    required: true
+  },
+  phone_number: {
+    type: String
+  },
+  date_updated: {
+    type: Date, default: Date.now
+  }
+  },
+  {
+    // create collocation
+    collection: 'applicants'
+})
+// export the schema
+module.exports = mongoose.model('Applicant', applicantSchema)
+// CREATE routes
+// - create applicant.routes.js