Method constructor

packages/db/src/errors.ts:46–67

()

// Module Instance Errors
export class DuplicateDbInstanceError extends TanStackDBError {
  constructor() {
    super(
      `Multiple instances of @tanstack/db detected!\n\n` +
        `This causes transaction context to be lost because each instance maintains ` +
        `its own transaction stack.\n\n` +
        `Common causes:\n` +
        `1. Different versions of @tanstack/db installed\n` +
        `2. Incompatible peer dependency versions in packages\n` +
        `3. Module resolution issues in bundler configuration\n\n` +
        `To fix:\n` +
        `1. Check installed versions: npm list @tanstack/db (or pnpm/yarn list)\n` +
        `2. Force a single version using package manager overrides:\n` +
        `   - npm: "overrides" in package.json\n` +
        `   - pnpm: "pnpm.overrides" in package.json\n` +
        `   - yarn: "resolutions" in package.json\n` +
        `3. Clear node_modules and lockfile, then reinstall\n\n` +
        `To temporarily disable this check (not recommended):\n` +
        `Set environment variable: TANSTACK_DB_DISABLE_DUP_CHECK=1\n\n` +
        `See: https://tanstack.com/db/latest/docs/troubleshooting#duplicate-instances`,
    )
    this.name = `DuplicateDbInstanceError`
  }
}

// Collection Configuration Errors