Razumem kako deluje sql in relacije med tabelami.

app.js

@@ -11,6 +11,7 @@ var messagesRouter = require('./routes/message');
 var app = express();
 
 const db = require('./models');
+db.sequelize.sync({ force: true });
 
 // view engine setup
 app.set('views', path.join(__dirname, 'views'));

migrations/20220207180926-create-message.js

@@ -8,9 +8,6 @@ module.exports = {
         primaryKey: true,
         type: Sequelize.INTEGER
       },
-      owner: {
-        type: Sequelize.INTEGER
-      },
       body: {
         type: Sequelize.STRING
       },

models/index.js

@@ -24,8 +24,8 @@ fs
     db[model.name] = model;
   });
 
-db.Message.belongsTo(db.User, {foreignKey: "id", as: "messages"});
+  db.User.hasMany(db.Message, {foreignKey: 'UserId'});
-db.User.hasMany(db.Message, {oreignKey: "id", as: "owner"});
+  db.Message.belongsTo(db.User);
 
 Object.keys(db).forEach(modelName => {
   if (db[modelName].associate) {

models/message.js

@@ -1,5 +1,4 @@
 'use strict';
-const User = require('./user').User;
 const {
   Model
 } = require('sequelize');
@@ -15,7 +14,6 @@ module.exports = (sequelize, DataTypes) => {
     }
   }
   Message.init({
-    owner: DataTypes.INTEGER,
     body: DataTypes.STRING
   }, {
     sequelize,

models/relations.js.old

@@ -1,5 +0,0 @@
-const Message = require('./message').Message;
-const User = require('./user').User;
-
-Message.belongsTo(User, {foreignKey: "id", as: "messages"});
-User.hasMany(Message, {oreignKey: "id", as: "owner"});

models/user.js

@@ -1,5 +1,4 @@
 'use strict';
-const Message = require('./message');
 const {
   Model
 } = require('sequelize');
@@ -24,9 +23,3 @@ module.exports = (sequelize, DataTypes) => {
   });
   return User;
 };
-
-// const Message = require('./message').Message;
-
-// Message.belongsTo(User, {foreignKey: "id", as: "messages"});
-// User.hasMany(Message, {oreignKey: "id", as: "owner"});
-

routes/message.js

@@ -2,11 +2,16 @@ var express = require('express');
 const db = require('../models');
 var router = express.Router();
 var Message = db.Message;
-
+var User = db.User;
 /* GET users listing. */
 router.get('/', async function(req, res, next) {
   var messages = await Message.findAll();
   res.send(messages);
 });
 
+router.get('/new', async function(req, res, next) {
+  var message = await Message.create({'body':'My First Message', UserId:3});
+  res.send(message);
+});
+
 module.exports = router;