use AD_TYPE enums for SearchRequest adType field

app/migrations/20190923185802-change-adType-in-searchRequests-table-to-SALE.js

@@ -0,0 +1,15 @@
+"use strict";
+
+module.exports = {
+  up: (queryInterface, Sequelize) => {
+    return queryInterface.sequelize.query(
+      `UPDATE "SearchRequests" SET "adType" = 'SALE' WHERE "adType" = 'sell';`
+    );
+  },
+
+  down: (queryInterface, Sequelize) => {
+    return queryInterface.sequelize.query(
+      `UPDATE "SearchRequests" SET "adType" = 'sell' WHERE "adType" = 'SALE';`
+    );
+  }
+};

app/models/searchRequest.js

@@ -1,5 +1,7 @@
 "use strict";
 
+const { AD_TYPE } = require("../common/enums");
+
 module.exports = (sequelize, DataTypes) => {
   const SearchRequest = sequelize.define("SearchRequest", {
     id: {
@@ -24,7 +26,7 @@ module.exports = (sequelize, DataTypes) => {
     adType: {
       type: DataTypes.TEXT,
       allowNull: false,
-      defaultValue: "sell"
+      defaultValue: AD_TYPE.AD_TYPE_SALE
     },
     email: DataTypes.TEXT,
     locality: DataTypes.TEXT,