Added price history log.

app/seeders/20200121150443-initial-price-history.js

@@ -1,11 +1,26 @@
 "use strict";
 
+const { RealEstate } = require("../models");
+
 module.exports = {
-  up: (queryInterface, Sequelize) => {
-    // ??
-    const realEstateInitialData = await queryInterface.Sequelize.findall ();
-    const priceHistoryInitialData = realEstateInitialData.map ();
-    
+  async up(queryInterface, Sequelize) {
+    //Reading initial data from RealEstate table in db
+    const realEstateInitialData = await RealEstate.findAll();
+    //Extruding data for table PriceHistory
+    const priceHistoryInitialData = realEstateInitialData.map(realEstate => {
+      //Null values canot be recognized by ignore duplicates in sequalize
+      //Value price = 0 indicates 'cijena na upit'
+      const priceTmp =
+        realEstate.dataValues.price === null ? 0 : realEstate.dataValues.price;
+
+      return {
+        realEstateId: realEstate.dataValues.id,
+        price: priceTmp,
+        createdAt: realEstate.dataValues.createdAt,
+        updatedAt: realEstate.dataValues.updatedAt
+      };
+    });
+
     return queryInterface.bulkInsert(
       "PriceHistory",
       priceHistoryInitialData,
@@ -13,7 +28,7 @@ module.exports = {
     );
   },
 
-  down: (queryInterface, Sequelize) => {
+  async down(queryInterface, Sequelize) {
     return queryInterface.bulkDelete("PriceHistory", null, {});
   }
 };