attach_enctype_error_multidict() — flask Function Reference

Architecture documentation for the attach_enctype_error_multidict() function in debughelpers.py from the flask codebase.

Function python ApplicationCore Scaffolding called by 1

Entity Profile

ApplicationCore→ Scaffolding→ attach_enctype_error_multidict() — flask Function Reference

Dependency Diagram

graph TD
  6a550efd_c111_6300_d6cd_0d4f9678b80f["attach_enctype_error_multidict()"]
  7fa0faba_d854_797c_b6bd_20820e905793["debughelpers.py"]
  6a550efd_c111_6300_d6cd_0d4f9678b80f -->|defined in| 7fa0faba_d854_797c_b6bd_20820e905793
  5f88d5d7_124f_d106_8824_7973e1208398["_load_form_data()"]
  5f88d5d7_124f_d106_8824_7973e1208398 -->|calls| 6a550efd_c111_6300_d6cd_0d4f9678b80f
  style 6a550efd_c111_6300_d6cd_0d4f9678b80f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/flask/debughelpers.py lines 81–104

def attach_enctype_error_multidict(request: Request) -> None:
    """Patch ``request.files.__getitem__`` to raise a descriptive error
    about ``enctype=multipart/form-data``.

    :param request: The request to patch.
    :meta private:
    """
    oldcls = request.files.__class__

    class newcls(oldcls):  # type: ignore[valid-type, misc]
        def __getitem__(self, key: str) -> t.Any:
            try:
                return super().__getitem__(key)
            except KeyError as e:
                if key not in request.form:
                    raise

                raise DebugFilesKeyError(request, key).with_traceback(
                    e.__traceback__
                ) from None

    newcls.__name__ = oldcls.__name__
    newcls.__module__ = oldcls.__module__
    request.files.__class__ = newcls