@nestjs/typeorm/dist/common/typeorm-compat.js

Nest - modern, fast, powerful node.js web framework (@typeorm)

import { createRequire } from 'node:module';
const require = createRequire(import.meta.url);
/**
 * Runtime compatibility helpers for accessing TypeORM APIs that were
 * removed in TypeORM v1.0.0 (notably `Connection` and `AbstractRepository`).
 *
 * Importing these symbols statically from `typeorm` would produce
 * TypeScript errors for consumers on TypeORM v1 when `skipLibCheck` is
 * disabled, and would cause runtime crashes inside `@nestjs/typeorm`
 * because the values resolve to `undefined`.
 *
 * Resolving them lazily via `require()` keeps the package working on
 * both TypeORM 0.3.x (where the symbols still exist) and 1.0.x
 * (where they have been removed) without forcing a type dependency.
 */
/**
 * Safely resolves an optional export from the installed `typeorm`
 * package. Returns `undefined` when the export is not present (e.g.
 * TypeORM v1.0.0 has removed it) or when the module fails to load.
 */
function resolveTypeormExport(exportName) {
    try {
        // Resolving through `createRequire` here (rather than a static import)
        // ensures the reference is resolved at runtime and is not included in
        // the emitted type definitions — which is required for forward
        // compatibility with TypeORM v1 where these symbols no longer exist.
        const typeorm = require('typeorm');
        return typeorm[exportName];
    }
    catch {
        return undefined;
    }
}
/**
 * The TypeORM `Connection` class (removed in TypeORM v1.0.0, replaced by
 * `DataSource` since 0.3.0). Resolves to `undefined` on TypeORM v1+.
 */
export const Connection = resolveTypeormExport('Connection');
/**
 * The TypeORM `AbstractRepository` class (removed in TypeORM v1.0.0).
 * Resolves to `undefined` on TypeORM v1+.
 */
export const AbstractRepository = resolveTypeormExport('AbstractRepository');