Enforce min_num constraint for inline editing

[7tg]

Description

When updating a model with inlines via update_<model>, the min_num constraint defined on InlineModelAdmin is not enforced.

Current Behavior

The MCP allows having fewer inline objects than required by the min_num setting on the inline admin.

Expected Behavior

The min_num constraint should be validated when:

• Creating a parent object with inlines
• Updating inlines (especially when deleting)

If the minimum count is not met, return a validation error.

Django Admin Reference

class ChapterInline(admin.TabularInline):
    model = Chapter
    min_num = 1  # Require at least 1 chapter

Implementation Notes

• Check inline_admin.min_num after processing inline operations
• Consider remaining inline count after deletions
• Return descriptive error when minimum not met

Labels

enhancement