feat: checking for whatsapp session Id on ticket and message creation

backend/src/database/migrations/20200906155658-add-whatsapp-field-to-tickets.js

@@ -0,0 +1,16 @@
+"use strict";
+
+module.exports = {
+	up: (queryInterface, Sequelize) => {
+		return queryInterface.addColumn("Tickets", "whatsappId", {
+			type: Sequelize.INTEGER,
+			references: { model: "Whatsapps", key: "id" },
+			onUpdate: "CASCADE",
+			onDelete: "SET NULL",
+		});
+	},
+
+	down: queryInterface => {
+		return queryInterface.removeColumn("Tickets", "whatsappId");
+	},
+};