Auto incrementing column does not auto-increment

Issue type:

• question
• bug report
• feature request
• documentation issue

Database system/driver:

• cordova
• mongodb
• mssql
• mysql / mariadb
• oracle
• postgres
• cockroachdb
• sqlite
• sqljs
• react-native
• expo

TypeORM version:

• latest
• @next
• 0.x.x (or put your version here)

When using @PrimaryGeneratedColumn, TypeORM isn’t setting the column as AUTO_INCREMENT, meaning that if I try to insert values into the table outside of TypeORM, I get duplicate key query errors.

1. Configure TypeORM to connect to MariaDB with mysql driver.
2. Use the following repository/entity

Repository:

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

@Entity()
export class Ingredient {
  @PrimaryGeneratedColumn()
  public id: number;

  @Column('text')
  public name: string;
}

Migration:

import {
  MigrationInterface,
  QueryRunner,
  Table,
} from 'typeorm';

export class createIngredientsTable1555981124297 implements MigrationInterface {
  private tableName: string = 'ingredient';

  public async up(queryRunner: QueryRunner): Promise<void> {
    await queryRunner.createTable(new Table({
      name: this.tableName,
      columns: [
        {
          name: 'id',
          type: 'int',
          isPrimary: true,
        },
      ],
    }));
  }

  public async down(queryRunner: QueryRunner): Promise<void> {
    await queryRunner.dropTable(this.tableName);
  }
}

Generated SQL:

CREATE TABLE `ingredient` (
  `id` int NOT NULL,
  PRIMARY KEY (`id`)
)

[robertmain]

To follow up on this, it looks like my migration requires the following in the id column:

isGenerated: true,
generationStrategy: 'increment',

However, I’m still leaving this open as I think this may be a documentation issue. My understanding from the documentation was that @PrimaryGeneratedColumn would perform this

[Kononnable]

If you have an idea of making docs better please create PR. We can discuss concrete proposition there.