unable to create a relationship with sequelize in postgres - node.js

Question

So i wish to create the following 2 tables : user and user_address and have a 1:many relationship among them, i.e a user can have multiple addresses. I followed the sequelize docs and ran the .belongsTo and hasMany on the models of these 2 tables, but i can't seem to query them when i request for a all users with include=[{model:'user_address'}] filter. I wanted to create a scalable system, so i used a somewhat modular approach.
The tables are defined in different files as js objects:
//user.js
const { DataTypes} = require('sequelize');
const name = "user"
const model ={
email : {type:DataTypes.STRING, allowNull:false,unique:true},
password : {type:DataTypes.STRING(16), allowNull:false},
phone : {type:DataTypes.STRING(20), allowNull:true},
name : {type:DataTypes.STRING(50), allowNull:true},
birthday : {type:DataTypes.STRING(50), allowNull:true},
}
const initConfig = {freezeTableName: true}
const getInstance = (email, pwd, phone = null, name = null, dob = null)=>{
return {email: email, password: pwd, phone: phone, name: name, birthday: dob}
}
module.exports = {
name:name,
model:model,
config:initConfig,
getInstance:getInstance
}
//user_address.js
const {DataTypes} = require("sequelize");
const name = "user_address"
const model = {
address : {type:DataTypes.STRING, allowNull:false},
zipcode : {type:DataTypes.INTEGER, allowNull:false},
is_main_address : {type:DataTypes.BOOLEAN, allowNull:false, default:false},
address_alias : {type:DataTypes.STRING, allowNull:true},
address_phone_number : {type:DataTypes.STRING, allowNull:true},
city : {type:DataTypes.STRING, allowNull:true},
}
// user_id : {type:DataTypes.INTEGER, allowNull:true, references: {model: 'user', key: 'id',},}
const config = {
freezeTableName: true
}
module.exports = {
name:name,
model:model,
config:config,
getInstance:()=>{},
}
then we have this ModelKeys.js class that provides an easy access to these model schemas:
const user = require("./user");
const note = require("./note");
const user_address = require('./user_addresses')
module.exports = {
ModelNames:{
USER : user,
USER_ADDRESS: user_address,
NOTE: note,
}
}
then we have this init db class that is supposed to initialise db, define models and run associations on them
const {Sequelize} = require('sequelize');
const {db_creds} = require("../.secrets/db_secrets");
const {ModelNames} = require("./models/model_keys");
const {logDB} = require("../a_commons/logutils");
let db = undefined
async function initTables() {
// create tables
Object.keys(ModelNames).forEach(key=>{
let model = ModelNames[key]
try {
logDB("initialising MODEL=",model==null? "null": `{js_obj : ${model.name}}`)
db.define(model.name,model.model,model.config)
logDB(`model created successfully : ${model.name}` )
}
catch (e) {logError(e)}
})
//sync with dbms
logDB("initialising sync with dbms server...")
await db.sync()
logDB("models synced successfully")
}
function validateTables() {
logDB("all tables are created.","tables=",db.models)
}
async function runAssociations(){
//create associations
logDB("init associations")
let userTable = db.models[ModelNames.USER.name]
let userAddressTable = db.models[ModelNames.USER_ADDRESS.name]
await userTable.hasMany(userAddressTable)
await userAddressTable.belongsTo(userTable)
logDB("associations created successfully")
//sync with dbms
logDB("initialising sync with dbms server...")
await db.sync()
logDB("models synced successfully")
}
module.exports = {
MyDatabase:{
initDB : async () => {
db = new Sequelize(db_creds)
await db
.authenticate()
.then(_ => logDB('Connection established successfully.'))
.then(_ => initTables())
.then(_ => validateTables())
.then(async _ => (await runAssociations()))
.catch(error => logError('Something went wrong', error))
},
getDB: ()=> {
// only useful once initDB is called
return db;
},
getTable : (modelName) => {
// only useful once initDB is called
return db.models[modelName]
}
}
}
if you notice, i did not created any identifier primary keys for my tables but since sequelize automatically generates id key, i was expecting the tables to get created successfully, which they do. during runAssociations() , function, i was also not sure, if it would work since the tables have already been created, and neither table has any reference to them, but i expected this to work.
this whole file runs when someone calls MyDatabase.initDB() and it runs without any errors.
therefore i further created a user_repo.js which looks like this :
const {MyDatabase} = require("./init_db");
const {ModelNames} = require("./models/model_keys");
const {logRepo} = require("../a_commons/logutils");
let userTable = null
module.exports = {
UserRepo: {
initDatabase: async () => {await MyDatabase.initDB()},
init: () => {
userTable = MyDatabase.getTable(ModelNames.USER.name)
logRepo("table initialised. table=",userTable.name)
},
createUser: async (user) => {
await userTable
.create(user)
.then(it => logRepo("user build successfully!", it.toJSON()))
},
getAllUsers: async () => {
let users = await userTable.findAll({include:[{model:MyDatabase.getTable(ModelNames.USER_ADDRESS.name)}]})
logRepo("available users = ", users.map(it=>it.email))
return users
},
getSingleUser: async (email) =>{
return await userTable.findOne(
{where: {email: email}, include:[{model:MyDatabase.getTable(ModelNames.USER_ADDRESS)}]},
)
}
}
}
however, when i run these lines:
const {UserRepo} = require("./user_repo");
const {ModelNames} = require("./models/model_keys");
async function x(){
let repo = UserRepo
await repo.initDatabase()
await repo.init()
await repo.createUser(ModelNames.USER.getInstance("ansh#12345.com","12345678"))
await repo.getAllUsers()
}
x()
1st few lines run perfectly, but for getAllUsers() line ,i get this error :
Executing (default): SELECT "user"."id", "user"."email", "user"."password", "user"."phone", "user"."name", "user"."birthday", "user"."createdAt", "user"."updatedAt", "user_addresses"."id" AS "user_addresses.id", "user_addresses"."address" AS "user_addresses.address", "user_addresses"."zipcode" AS "user_addresses.zipcode", "user_addresses"."is_main_address" AS "user_addresses.is_main_address", "user_addresses"."address_alias" AS "user_addresses.address_alias", "user_addresses"."address_phone_number" AS "user_addresses.address_phone_number", "user_addresses"."city" AS "user_addresses.city", "user_addresses"."createdAt" AS "user_addresses.createdAt", "user_addresses"."updatedAt" AS "user_addresses.updatedAt", "user_addresses"."userId" AS "user_addresses.userId" FROM "user" AS "user" LEFT OUTER JOIN "user_address" AS "user_addresses" ON "user"."id" = "user_addresses"."userId";
node:internal/process/promises:265
triggerUncaughtException(err, true /* fromPromise */);
^
Error
at Query.run (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/sequelize/lib/dialects/postgres/query.js:50:25)
at /Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/sequelize/lib/sequelize.js:314:28
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at async PostgresQueryInterface.select (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/sequelize/lib/dialects/abstract/query-interface.js:407:12)
at async Function.findAll (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/sequelize/lib/model.js:1134:21)
at async Object.getAllUsers (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/db/user_repo.js:22:25)
at async x (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/db/test_io.js:101:5) {
name: 'SequelizeDatabaseError',
parent: error: column user_addresses.userId does not exist
at Parser.parseErrorMessage (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/pg-protocol/dist/parser.js:287:98)
at Parser.handlePacket (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/pg-protocol/dist/parser.js:126:29)
at Parser.parse (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/pg-protocol/dist/parser.js:39:38)
at Socket.<anonymous> (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/pg-protocol/dist/index.js:11:42)
at Socket.emit (node:events:520:28)
at addChunk (node:internal/streams/readable:315:12)
at readableAddChunk (node:internal/streams/readable:289:9)
at Socket.Readable.push (node:internal/streams/readable:228:10)
at TCP.onStreamRead (node:internal/stream_base_commons:190:23) {
length: 120,
severity: 'ERROR',
code: '42703',
detail: undefined,
hint: undefined,
position: '839',
internalPosition: undefined,
internalQuery: undefined,
where: undefined,
schema: undefined,
table: undefined,
column: undefined,
dataType: undefined,
constraint: undefined,
file: 'parse_relation.c',
line: '3643',
routine: 'errorMissingColumn',
sql: 'SELECT "user"."id", "user"."email", "user"."password", "user"."phone", "user"."name", "user"."birthday", "user"."createdAt", "user"."updatedAt", "user_addresses"."id" AS "user_addresses.id", "user_addresses"."address" AS "user_addresses.address", "user_addresses"."zipcode" AS "user_addresses.zipcode", "user_addresses"."is_main_address" AS "user_addresses.is_main_address", "user_addresses"."address_alias" AS "user_addresses.address_alias", "user_addresses"."address_phone_number" AS "user_addresses.address_phone_number", "user_addresses"."city" AS "user_addresses.city", "user_addresses"."createdAt" AS "user_addresses.createdAt", "user_addresses"."updatedAt" AS "user_addresses.updatedAt", "user_addresses"."userId" AS "user_addresses.userId" FROM "user" AS "user" LEFT OUTER JOIN "user_address" AS "user_addresses" ON "user"."id" = "user_addresses"."userId";',
parameters: undefined
},
original: error: column user_addresses.userId does not exist
at Parser.parseErrorMessage (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/pg-protocol/dist/parser.js:287:98)
at Parser.handlePacket (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/pg-protocol/dist/parser.js:126:29)
at Parser.parse (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/pg-protocol/dist/parser.js:39:38)
at Socket.<anonymous> (/Users/anshsachdeva/Downloads/f1_self/f4_web/f4_web_individual_gits/ecommerce/sequalize_tests/notes_db/node_modules/pg-protocol/dist/index.js:11:42)
at Socket.emit (node:events:520:28)
at addChunk (node:internal/streams/readable:315:12)
at readableAddChunk (node:internal/streams/readable:289:9)
at Socket.Readable.push (node:internal/streams/readable:228:10)
at TCP.onStreamRead (node:internal/stream_base_commons:190:23) {
length: 120,
severity: 'ERROR',
code: '42703',
detail: undefined,
hint: undefined,
position: '839',
internalPosition: undefined,
internalQuery: undefined,
where: undefined,
schema: undefined,
table: undefined,
column: undefined,
dataType: undefined,
constraint: undefined,
file: 'parse_relation.c',
line: '3643',
routine: 'errorMissingColumn',
sql: 'SELECT "user"."id", "user"."email", "user"."password", "user"."phone", "user"."name", "user"."birthday", "user"."createdAt", "user"."updatedAt", "user_addresses"."id" AS "user_addresses.id", "user_addresses"."address" AS "user_addresses.address", "user_addresses"."zipcode" AS "user_addresses.zipcode", "user_addresses"."is_main_address" AS "user_addresses.is_main_address", "user_addresses"."address_alias" AS "user_addresses.address_alias", "user_addresses"."address_phone_number" AS "user_addresses.address_phone_number", "user_addresses"."city" AS "user_addresses.city", "user_addresses"."createdAt" AS "user_addresses.createdAt", "user_addresses"."updatedAt" AS "user_addresses.updatedAt", "user_addresses"."userId" AS "user_addresses.userId" FROM "user" AS "user" LEFT OUTER JOIN "user_address" AS "user_addresses" ON "user"."id" = "user_addresses"."userId";',
parameters: undefined
},
sql: 'SELECT "user"."id", "user"."email", "user"."password", "user"."phone", "user"."name", "user"."birthday", "user"."createdAt", "user"."updatedAt", "user_addresses"."id" AS "user_addresses.id", "user_addresses"."address" AS "user_addresses.address", "user_addresses"."zipcode" AS "user_addresses.zipcode", "user_addresses"."is_main_address" AS "user_addresses.is_main_address", "user_addresses"."address_alias" AS "user_addresses.address_alias", "user_addresses"."address_phone_number" AS "user_addresses.address_phone_number", "user_addresses"."city" AS "user_addresses.city", "user_addresses"."createdAt" AS "user_addresses.createdAt", "user_addresses"."updatedAt" AS "user_addresses.updatedAt", "user_addresses"."userId" AS "user_addresses.userId" FROM "user" AS "user" LEFT OUTER JOIN "user_address" AS "user_addresses" ON "user"."id" = "user_addresses"."userId";',
parameters: {}
}
Process finished with exit code 1
Any idea on how to fix this?

Answer 1

You need to register all models and all their associations before calling sync because hasMany/belongsTo only registers associations inside Sequelize models do nothing in DB. Its the responsibility of sync to create the whole structure taking into account all registered models and associations.
await db
.authenticate()
.then(_ => logDB('Connection established successfully.'))
.then(_ => runAssociations())
.then(_ => initTables())
.then(_ => validateTables())
.catch(error => logError('Something went wrong', error))