add unique constraint - composite key to the RealEstates table

app/migrations/20190917090318-add-composite-key-to-realEstates.js

@@ -0,0 +1,21 @@
+"use strict";
+
+module.exports = {
+  up: (queryInterface, Sequelize) => {
+    return queryInterface.addConstraint(
+      "RealEstates",
+      ["originAgencyName", "agencyObjectId"],
+      {
+        type: "unique",
+        name: "agencyNameObjectIdUniqueKey"
+      }
+    );
+  },
+
+  down: (queryInterface, Sequelize) => {
+    return queryInterface.removeConstraint(
+      "RealEstates",
+      "agencyNameObjectIdUniqueKey"
+    );
+  }
+};