init

sequelize/extra-setup.js

@@ -0,0 +1,30 @@
+function applyExtraSetup(sequelize) {
+	const { lessons, students, teachers, lesson_students, lesson_teachers } = sequelize.models;
+
+	lessons.belongsToMany(students, {
+		as: "students",
+		through: lesson_students,
+		foreignKey: "lesson_id",
+		otherKey: "student_id",
+	});
+	lessons.belongsToMany(teachers, {
+		as: "teachers",
+		through: lesson_teachers,
+		foreignKey: "lesson_id",
+		otherKey: "teacher_id",
+	});
+	students.belongsToMany(lessons, {
+		as: "lessons",
+		through: lesson_students,
+		foreignKey: "student_id",
+		otherKey: "lesson_id",
+	});
+	teachers.belongsToMany(lessons, {
+		as: "lessons",
+		through: lesson_teachers,
+		foreignKey: "teacher_id",
+		otherKey: "lesson_id",
+	});
+}
+
+module.exports = { applyExtraSetup };

sequelize/index.js

@@ -0,0 +1,32 @@
+const { Sequelize } = require("sequelize");
+const { applyExtraSetup } = require("./extra-setup");
+require("dotenv").config();
+
+const sequelize = new Sequelize(process.env.DATABASE_URL, {
+	logging: false,
+	dialectOptions: {
+		ssl: {
+			require: true,
+			rejectUnauthorized: false,
+		},
+		define: {
+			timestamps: false,
+		},
+	},
+});
+
+const modelDefiners = [
+	require("./models/lessons.model"),
+	require("./models/students.model"),
+	require("./models/teachers.model"),
+	require("./models/lesson_students.model"),
+	require("./models/lesson_teachers.model"),
+];
+
+for (const modelDefiner of modelDefiners) {
+	modelDefiner(sequelize);
+}
+
+applyExtraSetup(sequelize);
+
+module.exports = sequelize;

sequelize/models/lesson_students.model.js

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+const { DataTypes } = require("sequelize");
+
+module.exports = (sequelize) => {
+	let lesson_students = sequelize.define(
+		"lesson_students",
+		{
+			visit: {
+				type: DataTypes.BOOLEAN,
+				allowNull: true,
+				defaultValue: false,
+			},
+		},
+		{
+			sequelize,
+			tableName: "lesson_students",
+			schema: "public",
+			timestamps: false,
+		}
+	);
+	lesson_students.removeAttribute("id");
+};

sequelize/models/lesson_teachers.model.js

@@ -0,0 +1,15 @@
+const { DataTypes } = require("sequelize");
+
+module.exports = (sequelize) => {
+	let lesson_teachers = sequelize.define(
+		"lesson_teachers",
+		{},
+		{
+			sequelize,
+			tableName: "lesson_teachers",
+			schema: "public",
+			timestamps: false,
+		}
+	);
+	lesson_teachers.removeAttribute("id");
+};

sequelize/models/lessons.model.js

@@ -0,0 +1,41 @@
+const { DataTypes } = require("sequelize");
+
+module.exports = (sequelize) => {
+	sequelize.define(
+		"lessons",
+		{
+			id: {
+				autoIncrement: true,
+				type: DataTypes.INTEGER,
+				allowNull: false,
+				primaryKey: true,
+			},
+			date: {
+				type: DataTypes.DATEONLY,
+				allowNull: false,
+			},
+			title: {
+				type: DataTypes.STRING(100),
+				allowNull: true,
+			},
+			status: {
+				type: DataTypes.INTEGER,
+				allowNull: true,
+				defaultValue: 0,
+			},
+		},
+		{
+			sequelize,
+			tableName: "lessons",
+			schema: "public",
+			timestamps: false,
+			indexes: [
+				{
+					name: "lessons_pkey",
+					unique: true,
+					fields: [{ name: "id" }],
+				},
+			],
+		}
+	);
+};

sequelize/models/students.model.js

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+const { DataTypes } = require("sequelize");
+
+module.exports = (sequelize) => {
+	sequelize.define(
+		"students",
+		{
+			id: {
+				autoIncrement: true,
+				type: DataTypes.INTEGER,
+				allowNull: false,
+				primaryKey: true,
+			},
+			name: {
+				type: DataTypes.STRING(10),
+				allowNull: true,
+			},
+		},
+		{
+			sequelize,
+			tableName: "students",
+			schema: "public",
+			timestamps: false,
+			indexes: [
+				{
+					name: "students_pkey",
+					unique: true,
+					fields: [{ name: "id" }],
+				},
+			],
+		}
+	);
+};

sequelize/models/teachers.model.js

@@ -0,0 +1,32 @@
+const { DataTypes } = require("sequelize");
+
+module.exports = (sequelize) => {
+	sequelize.define(
+		"teachers",
+		{
+			id: {
+				autoIncrement: true,
+				type: DataTypes.INTEGER,
+				allowNull: false,
+				primaryKey: true,
+			},
+			name: {
+				type: DataTypes.STRING(10),
+				allowNull: true,
+			},
+		},
+		{
+			sequelize,
+			tableName: "teachers",
+			schema: "public",
+			timestamps: false,
+			indexes: [
+				{
+					name: "teachers_pkey",
+					unique: true,
+					fields: [{ name: "id" }],
+				},
+			],
+		}
+	);
+};