Fix OpenAPI schema for zero numeric bounds on ListField children

[zainnadeem786]

Addresses discussion #9976

Summary

This PR fixes OpenAPI schema generation for ListField child fields with zero-valued numeric bounds.

AutoSchema._map_min_max() previously used truthiness checks for min_value and max_value, which caused valid bounds like 0 and 0.0 to be omitted from generated schemas.

This updates the checks to only skip None, preserving existing behavior for positive, negative, and absent bounds.

Changes

• Preserve minimum when a child field uses min_value=0 or min_value=0.0
• Preserve maximum when a child field uses max_value=0 or max_value=0.0
• Add regression coverage for IntegerField and FloatField children inside ListField

Testing

Ran:

.\.venv\Scripts\python.exe -m pytest tests/schemas/test_openapi.py::TestFieldMapping -q -p no:cacheprovider

Result:

6 passed, 18 subtests passed

Also ran:

.\.venv\Scripts\python.exe -m pytest tests/schemas/test_openapi.py -q -p no:cacheprovider

Result:

8 passed, 51 skipped, 18 subtests passed

The skipped tests are due to uritemplate not being installed locally.

[Copilot]

Pull request overview

This PR fixes OpenAPI schema generation in AutoSchema so numeric bounds of 0/0.0 on fields are not dropped when mapping ListField child schemas, addressing cases where falsy checks previously omitted valid minimum/maximum values.

Changes:

• Update AutoSchema._map_min_max() to treat only None as “unset”, preserving zero-valued min_value/max_value.
• Add regression tests covering FloatField and IntegerField children inside ListField with min_value=0 / max_value=0.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
rest_framework/schemas/openapi.py	Fixes min/max mapping logic to include zero numeric bounds in generated schemas.
tests/schemas/test_openapi.py	Adds regression coverage ensuring minimum/maximum are emitted for zero-valued bounds on ListField children.

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