ToolJet/server/migrations/1691004706564-CreateEventHandlerTable.ts

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

export class CreateEventHandlerTable1691004706564 implements MigrationInterface {
  public async up(queryRunner: QueryRunner): Promise<void> {
    await queryRunner.createTable(
      new Table({
        name: 'event_handlers',
        columns: [
          {
            name: 'id',
            type: 'uuid',
            isPrimary: true,
            default: 'gen_random_uuid()',
          },
          {
            name: 'name',
            type: 'varchar',
            isNullable: false,
          },
          {
            name: 'index',
            type: 'int',
            isNullable: false,
          },
          {
            name: 'event',
            type: 'jsonb',
            isNullable: false,
          },
          {
            name: 'app_version_id',
            type: 'uuid',
            isNullable: false,
          },
          {
            name: 'source_id',
            type: 'varchar',
            isNullable: false,
          },
          {
            name: 'target',
            type: 'enum',
            enum: ['page', 'component', 'data_query', 'table_column', 'table_action'],
            default: "'page'",
            isNullable: false,
          },
          {
            name: 'created_at',
            type: 'timestamp',
            isNullable: true,
            default: 'now()',
          },
          {
            name: 'updated_at',
            type: 'timestamp',
            isNullable: true,
            default: 'now()',
          },
        ],
      })
    );

    // Add foreign key to relate EventHandler with AppVersion
    await queryRunner.createForeignKey(
      'event_handlers',
      new TableForeignKey({
        columnNames: ['app_version_id'],
        referencedColumnNames: ['id'],
        referencedTableName: 'app_versions',
        onDelete: 'CASCADE',
      })
    );
  }

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