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f818eac7d7
add-tests-for-parameter-defaults
check-zh-translation-prompt
fix-broken-links-in-index.md
fix-links
fix-multiple-upload-file-in-swagger
fix-nested-annotated-types-in-field_annotation_is_scalar_sequence
fix-response_model_---parameters-with-Iterable
master
pin-actions-by-sha
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update-dependabot-config
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v0.1.16
${ noResults }
tiangolo.fastapi/fastapi/dependencies
Sai Tarrun Pitta
f818eac7d7
When a Pydantic BaseModel is used as a Form() parameter, fields that
were absent from the submission or submitted as blank strings ("") were
being pre-filled with their default values before model construction.
Pydantic then treated those pre-filled defaults as explicitly-set values,
making model_fields_set incorrect and preventing model validators from
distinguishing unset fields from fields set to their default.
Two cases needed fixing:
1. Absent fields - the field key is not in the form data at all
(e.g. an unchecked HTML checkbox, which browsers omit entirely).
2. Blank string fields - the field key is present but with value ""
(e.g. a cleared text input, which browsers send as key=).
Fix: add form_input=True parameter to _get_multidict_value. When set,
both absent and blank-string values return None rather than the field
default. _extract_form_body now calls _get_multidict_value(form_input=True)
so neither case gets pre-populated into the values dict. Pydantic then
applies defaults through its own mechanism, which correctly leaves those
fields out of model_fields_set.
Required fields are unaffected: Pydantic still raises a validation error
when a required field is absent from the submitted data.
Closes #13399
Co-authored-by: sneakers-the-rat <[email protected]>
|
4 months ago | |
|---|---|---|
| .. | ||
| __init__.py | ♻️ Refactor, fix and update code | 8 years ago |
| models.py | 🎨 Update internal types for Python 3.10 (#14898) | 5 months ago |
| utils.py | Fix form model pre-filling defaults, breaking model_fields_set | 4 months ago |