kandi background

typeorm | Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server | Object-Relational Mapping library

Download this library from

kandi X-RAY | typeorm Summary

typeorm is a TypeScript library typically used in Utilities, Object-Relational Mapping applications. typeorm has no bugs, it has a Permissive License and it has medium support. However typeorm has 1 vulnerabilities. You can download it from GitHub.
TypeORM is an ORM that can run in NodeJS, Browser, Cordova, PhoneGap, Ionic, React Native, NativeScript, Expo, and Electron platforms and can be used with TypeScript and JavaScript (ES5, ES6, ES7, ES8). Its goal is to always support the latest JavaScript features and provide additional features that help you to develop any kind of application that uses databases - from small applications with a few tables to large scale enterprise applications with multiple databases. TypeORM supports both Active Record and Data Mapper patterns, unlike all other JavaScript ORMs currently in existence, which means you can write high quality, loosely coupled, scalable, maintainable applications the most productive way. TypeORM is highly influenced by other ORMs, such as Hibernate, Doctrine and Entity Framework.

kandi-support Support

  • typeorm has a medium active ecosystem.
  • It has 27888 star(s) with 5061 fork(s). There are 361 watchers for this library.
  • There were 10 major release(s) in the last 6 months.
  • There are 1475 open issues and 5178 have been closed. On average issues are closed in 92 days. There are 22 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of typeorm is 0.3.6

quality kandi Quality

  • typeorm has 0 bugs and 0 code smells.


  • typeorm has 1 vulnerability issues reported (1 critical, 0 high, 0 medium, 0 low).
  • typeorm code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.

license License

  • typeorm is licensed under the MIT License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.


  • typeorm releases are available to install and integrate.
  • Installation instructions, examples and code snippets are available.
  • It has 9 lines of code, 0 functions and 2703 files.
  • It has low code complexity. Code complexity directly impacts maintainability of the code.
Top functions reviewed by kandi - BETA

Coming Soon for all Libraries!

Currently covering the most popular Java, JavaScript and Python libraries. See a SAMPLE HERE.
kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.

typeorm Key Features

Supports both DataMapper and ActiveRecord (your choice).

Entities and columns.

Database-specific column types.

Entity manager.

Repositories and custom repositories.

Clean object relational model.

Associations (relations).

Eager and lazy relations.

Uni-directional, bi-directional and self-referenced relations.

Supports multiple inheritance patterns.




Migrations and automatic migrations generation.

Connection pooling.


Using multiple database connections.

Working with multiple databases types.

Cross-database and cross-schema queries.

Elegant-syntax, flexible and powerful QueryBuilder.

Left and inner joins.

Proper pagination for queries using joins.

Query caching.

Streaming raw results.


Listeners and subscribers (hooks).

Supports closure table pattern.

Schema declaration in models or separate configuration files.

Connection configuration in json / xml / yml / env formats.

Supports MySQL / MariaDB / Postgres / CockroachDB / SQLite / Microsoft SQL Server / Oracle / SAP Hana / sql.js.

Supports MongoDB NoSQL database.

Works in NodeJS / Browser / Ionic / Cordova / React Native / NativeScript / Expo / Electron platforms.

TypeScript and JavaScript support.

ESM and CommonJS support.

Produced code is performant, flexible, clean and maintainable.

Follows all possible best practices.


typeorm Examples and Code Snippets

  • Features
  • Installation
  • Quick Start
  • Create a model
  • Create an entity
  • Adding table columns
  • Creating a primary column
  • Creating an auto-generated column
  • Column data types
  • Creating a connection to the database
  • Loading all entities from the directory
  • Running the application
  • Creating and inserting a photo into the database
  • Using async/await syntax
  • Using Entity Manager
  • Using Repositories
  • Loading from the database
  • Updating in the database
  • Removing from the database
  • Creating a one-to-one relation
  • Save a one-to-one relation
  • Inverse side of the relationship
  • Relations in ESM projects
  • Loading objects with their relations
  • Using cascades to automatically save related objects
  • Creating a many-to-one / one-to-many relation
  • Creating a many-to-many relation
  • Using QueryBuilder
  • TypeORM insert row with foreign key
  • Validation Error: Using global entity manager instance methods for context specific actions is disallowed
  • TypeORM composite foreign key
  • TypeORM Inner Join Same Table
  • Mock bcrypt module module in Nest.js
  • NestJS - Expected undefined to be a GraphQL schema
  • TypeORM error with MongoDB: .find() does not work, error: TypeError: Cannot read property 'prototype' of undefined
  • How to make OneToOne relationship optional for multiple inherited classes?
  • Cannot query across one-to-many for property NestJS and TypeORM
  • TypeORM - How to access a related object inside another object in javascript


import { Entity, PrimaryGeneratedColumn, Column } from "typeorm";

export class User {

    id: number;

    firstName: string;

    lastName: string;

    age: number;


Community Discussions

Trending Discussions on typeorm
  • TypeORM insert row with foreign key
  • How to reference only one entity in a one-to-many relationship in TypeORM
  • What is the question mark for next to TypeScript arg when its GraphQL arg indicates nullable true?
  • Validation Error: Using global entity manager instance methods for context specific actions is disallowed
  • TypeORM composite foreign key
  • Can I abort DB operation / transaction in TypeORM using AbortSignal?
  • TypeORM Inner Join Same Table
  • npm ERESOLVE unable to resolve dependency tree NestJs Passport
  • Docker NodeJS app cant connect to postgres database
  • Mock bcrypt module module in Nest.js
Trending Discussions on typeorm


TypeORM insert row with foreign key

Asked 2022-Mar-07 at 04:01

I have a @OneToMany relation between
Chatroom < 1 ---- M > Messages
And the problem that I have is, whenever I try to insert a Message (or bulk of Messages), The foreign key for ChatRoom is null.
In addition, I'm uploading my setup.

export class Message {

    id: string;

    @ManyToOne(() => ChatRoom, chatroom => chatroom.messages)
    chatRoom: ChatRoom | undefined

    @Column({nullable: false})
    message: string;

    @Column({nullable: false})
    receiver: string;

    @Column({nullable: false})
    created_utc: Date;
export class ChatRoom {

    id: string;

    @OneToMany(() => Message, message => message.chatRoom, {
        cascade: ["insert", "remove"]
    @JoinColumn({name: 'id'})
    messages: Message[];

    last_msg: string;

    last_msg_created_utc: Date;

    num_messages: number;

    num_replies: number;

    seen: boolean;



When trying to create a bulk insert on many messages, I can notice that the query is not setting the foreign key any value, but NULL.

The Message json that I'm trying to insert:

 id: '1',
 message: 'text',
 receiver: 'someone',
 created_utc: 'utc date...',
 chatRoomId: '123' -> chat room id exists 

the query looks like this :
(this query is for single insert not bulk, but it goes the same for bulk)
INSERT INTO "messages"("id", "message", "receiver", "created_utc", "chatRoomId") VALUES ($1, $2, $3, $4, DEFAULT) -- PARAMETERS: [" bJU7","Zdravo test","kompir_zomba","2021-

This tells me that chatRoomId is not even taken into consideration when inserting the rows. The table looks as following enter image description here

The Typeorm insert query that I use to insert Messages

@InjectRepository(Message) private messageRepository: Repository<Message>


Anyone has any idea how to proceed with this ?


Answered 2021-Sep-05 at 10:54

I have faced a similar issue with TypeORM when working on a NestJS project.


The issue is happening because you don't have any chatRoomId field defined in your Message Entity (class Message). So, when TypORM maps your message data with the Message entity, it doesn't set the chatRoomId.


There are two solutions to fix this problem.

  1. You can add the chatRoomId field in your Message entity and now you will be able to send the field when saving the message data.


@Column({type: "uuid"}) // <- Assuming that your primary key type is UUID (OR you can have "char")
chatRoomId: string;

Now, usually you would not need to create a migration for this since this field already exists in the database table.

  1. The other way is to pass an instance of ChatRoom entity to the message object when saving it.

You can, first, find the chat room using its ID and then pass it in the message object.

Your final message object should look like this:

 id: '1',
 message: 'text',
 receiver: 'someone',
 created_utc: 'utc date...',
 chatRoom: chatRoomData // <-- Assuming that chatRoomData contains the ChatRoom entity

Source https://stackoverflow.com/questions/69062374

Community Discussions, Code Snippets contain sources that include Stack Exchange Network


No vulnerabilities reported

Install typeorm

Install the npm package:.
Install the npm package: npm install typeorm --save
You need to install reflect-metadata shim: npm install reflect-metadata --save and import it somewhere in the global place of your app (for example in app.ts): import "reflect-metadata";
You may need to install node typings: npm install @types/node --save-dev
Install a database driver: for MySQL or MariaDB npm install mysql --save (you can install mysql2 instead as well) for PostgreSQL or CockroachDB npm install pg --save for SQLite npm install sqlite3 --save for Microsoft SQL Server npm install mssql --save for sql.js npm install sql.js --save for Oracle npm install oracledb --save To make the Oracle driver work, you need to follow the installation instructions from their site. for SAP Hana npm i @sap/hana-client npm i hdb-pool SAP Hana support made possible by the sponsorship of Neptune Software. for MongoDB (experimental) npm install mongodb@^3.6.0 --save for NativeScript, react-native and Cordova Check documentation of supported platforms Install only one of them, depending on which database you use.
The quickest way to get started with TypeORM is to use its CLI commands to generate a starter project. Quick start works only if you are using TypeORM in a NodeJS application. If you are using other platforms, proceed to the step-by-step guide.


Learn about contribution here and how to setup your development environment here.

Build your Application

Share this kandi XRay Report