@mikro-orm/migrations/JSMigrationGenerator.js

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

import { MigrationGenerator } from './MigrationGenerator.js';
/** Generates migration files in CommonJS JavaScript format. */
export class JSMigrationGenerator extends MigrationGenerator {
    /**
     * @inheritDoc
     */
    generateMigrationFile(className, diff) {
        let ret = `'use strict';\n`;
        ret += `Object.defineProperty(exports, '__esModule', { value: true });\n`;
        ret += `const { Migration } = require('@mikro-orm/migrations');\n\n`;
        ret += `class ${className} extends Migration {\n\n`;
        ret += `  async up() {\n`;
        diff.up.forEach(sql => (ret += this.createStatement(sql, 4)));
        ret += `  }\n\n`;
        /* v8 ignore next */
        if (diff.down.length > 0) {
            ret += `  async down() {\n`;
            diff.down.forEach(sql => (ret += this.createStatement(sql, 4)));
            ret += `  }\n\n`;
        }
        ret += `}\n`;
        ret += `exports.${className} = ${className};\n`;
        return ret;
    }
}