Error Tracking

Fasq Riverpod makes it easy to monitor and report query failures globally by leveraging Riverpod’s dependency injection system. You can easily integrate external services like Sentry, Firebase Crashlytics, or custom logging.

Global Error Reporting

Error reporters are registered globally via the fasqErrorReportersProvider. This provider accepts a list of FasqErrorReporter implementations.

Default Setup

By default, the list of error reporters is empty:


final fasqErrorReportersProvider = Provider<List<FasqErrorReporter>>((ref) {
  return [];
});

Adding Reporters

To add error reporters, override the fasqErrorReportersProvider in your ProviderScope:


import 'package:fasq_riverpod/fasq_riverpod.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
 
void main() {
  runApp(
    ProviderScope(
      overrides: [
        fasqErrorReportersProvider.overrideWithValue([
          SentryErrorReporter(),
          CrashlyticsErrorReporter(),
        ]),
      ],
      child: MyApp(),
    ),
  );
}

Implementing a Reporter

To create an error reporter, implement the FasqErrorReporter interface from the core fasq package.

Sentry Example


import 'package:fasq/fasq.dart';
import 'package:sentry_flutter/sentry_flutter.dart';
 
class SentryErrorReporter implements FasqErrorReporter {
  @override
  void report(FasqErrorContext context) {
    Sentry.captureException(
      context.error,
      stackTrace: context.stackTrace,
      hint: Hint.withMap({
        'queryKey': context.queryKey.join('/'),
        'retryCount': context.retryCount,
        'networkStatus': context.networkStatus ? 'online' : 'offline',
        // Always use sanitized options to avoid leaking PII
        'options': context.sanitizedQueryOptions,
      }),
    );
  }
}

FasqErrorContext

The FasqErrorContext provides rich metadata about why a query failed:

queryKey: The key of the failing query.
error: The actual error object.
stackTrace: The associated stack trace.
retryCount: How many times the query was retried before giving up.
networkStatus: Whether the device was online during the failure.
sanitizedQueryOptions: A PII-safe version of the query options.

PII Sanitization

Fasq automatically sanitizes query options before they reach your reporter. This ensures that sensitive data like tokens or user-specific metadata (from QueryMeta) are not leaked into your error tracking service.

[!IMPORTANT] Always prefer context.sanitizedQueryOptions over accessing the raw query options in your reporters.

Integration Examples

Custom Logger

You can use a reporter to send errors to your own logging system or analytics:


class AnalyticsErrorReporter implements FasqErrorReporter {
  @override
  void report(FasqErrorContext context) {
    Analytics.logEvent(
      name: 'query_failure',
      parameters: {
        'key': context.queryKey.join('_'),
        'error': context.error.toString(),
      },
    );
  }
}

Combined with Observers

While FasqErrorReporter is dedicated to failure reporting, you can also use global observers (via fasqObserversProvider) to track the entire lifecycle of queries, including successful fetches and cache hits.