app_errorhandler() — flask Function Reference

Architecture documentation for the app_errorhandler() function in blueprints.py from the flask codebase.

Function python ApplicationCore Scaffolding calls 2

Entity Profile

ApplicationCore→ Scaffolding→ app_errorhandler() — flask Function Reference

Dependency Diagram

graph TD
  da9ef7e9_1774_18fd_3b97_c5ab1886cd8d["app_errorhandler()"]
  0c59fa87_9a90_f011_4207_98ae96479921["Blueprint"]
  da9ef7e9_1774_18fd_3b97_c5ab1886cd8d -->|defined in| 0c59fa87_9a90_f011_4207_98ae96479921
  0085606d_b5d3_d0dc_0155_6135d079c059["record_once()"]
  da9ef7e9_1774_18fd_3b97_c5ab1886cd8d -->|calls| 0085606d_b5d3_d0dc_0155_6135d079c059
  b1d22eae_0124_5afd_3df0_850086c3d41b["errorhandler()"]
  da9ef7e9_1774_18fd_3b97_c5ab1886cd8d -->|calls| b1d22eae_0124_5afd_3df0_850086c3d41b
  style da9ef7e9_1774_18fd_3b97_c5ab1886cd8d fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/flask/sansio/blueprints.py lines 656–670

    def app_errorhandler(
        self, code: type[Exception] | int
    ) -> t.Callable[[T_error_handler], T_error_handler]:
        """Like :meth:`errorhandler`, but for every request, not only those handled by
        the blueprint. Equivalent to :meth:`.Flask.errorhandler`.
        """

        def decorator(f: T_error_handler) -> T_error_handler:
            def from_blueprint(state: BlueprintSetupState) -> None:
                state.app.errorhandler(code)(f)

            self.record_once(from_blueprint)
            return f

        return decorator