fix(schema): include type field when nullable is used with allOf#3784
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kamilmysliwiec merged 2 commits intoApr 15, 2026
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When a property is nullable with a $ref (e.g. UserDto | null), the schema had nullable: true and allOf but no type field. This caused Redocly lint errors since OpenAPI 3.0 requires type when nullable is present. Now preserves type: 'object' for nullable properties with schema combinators. Closes nestjs#3274
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Could you add an e2e test? |
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Hi @kamilmysliwiec, e2e test added! It adds a |
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lgtm |
4 tasks
4 tasks
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PR Checklist
PR Type
What is the current behavior?
When a property is
UserDto | null, the schema hasnullable: trueandallOf: [{ $ref }]but notypefield. Redocly's linter errors: "The type field must be defined when the nullable field is used."Issue Number: #3274
What is the new behavior?
Preserves
type: 'object'for nullable properties with schema combinators. TheextractPropertiesFromTypecombinator handler now keepstypewhennullable: true.Does this PR introduce a breaking change?