@mikro-orm/core/utils/TransactionContext.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 { createAsyncContext } from './AsyncContext.js';
/** Uses `AsyncLocalStorage` to maintain a transaction-scoped EntityManager context across async operations. */
export class TransactionContext {
    em;
    static storage = createAsyncContext();
    id;
    constructor(em) {
        this.em = em;
        this.id = this.em._id;
    }
    /**
     * Creates new TransactionContext instance and runs the code inside its domain.
     */
    static create(em, next) {
        const context = new TransactionContext(em);
        return this.storage.run(context, next);
    }
    /**
     * Returns current TransactionContext (if available).
     */
    static currentTransactionContext() {
        return this.storage.getStore();
    }
    /**
     * Returns current EntityManager (if available).
     */
    static getEntityManager(name = 'default') {
        const context = TransactionContext.currentTransactionContext();
        return context?.em.name === name ? context.em : undefined;
    }
}