Primary key field should not be nullable

[LanceMoe]

Primary key field should not be nullable

Description

If a value is a primary key, it should not be optional(nullable). For example, there is a Model called Foo, whose primary key is a UUIDField called id. Submitting a form using FooIn will use exclude_readonly=True, so the id field will not be included. And for output FooOut id cannot be nullable because it is the primary key. This PR fixes this problem.

Before:

After:

Motivation and Context

My projects use OpenAPI documentation auto-generated as a TypeScript client. It helps a lot to annotate the types correctly.

How Has This Been Tested?

This is a minor change, and it passes all existing tests. I tested it in a few of my live projects and it works fine.

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added the changelog accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[coveralls]

Pull Request Test Coverage Report for Build 11903355177

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.001%) to 89.255%

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Totals
Change from base Build 11887821450:	0.001%
Covered Lines:	6224
Relevant Lines:	6857

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💛 - Coveralls