OpenApiProvider fails on allowEmptyValue

[jkone27]

Description

parameters:
        - in: query
          name: metadata
          schema:
            type: boolean
          allowEmptyValue: true  # <----- validation of this field fails

https://swagger.io/docs/specification/describing-parameters/

but validation gives errors

allowEmptyValue is not a valid property @ ...

Repro steps

try a schema with allowEmptyValue

Expected behavior

should not give any errors

Actual behavior

Fails parsing/validation

Known workarounds

remove the field from openapi spec

Affected Type Providers

• [X ] OpenApiClientProvider

Related information

• MacOS
• master
• .NET6

[sergey-tihon]

try a schema with allowEmptyValue

@jkone27 do you have sample of such schema?

[jkone27]

i don't atm, not sure where i took it from, but i think you can test adding that parameter definition in some test route and get the openapi from here?

 - in: query
          name: metadata
          schema:
            type: boolean
          allowEmptyValue: true  # <----- validation of this field fails

https://editor.swagger.io/

[github-actions]

🤖 This is an automated response from Repo Assist.

The allowEmptyValue validation error you're seeing comes from the underlying Microsoft.OpenApi parser (not SwaggerProvider itself), which treats allowEmptyValue as invalid for non-form/non-body parameters per strict OpenAPI 3.0 rules.

A workaround was added in a recent release: the IgnoreParseErrors static parameter. Setting it to true makes the type provider continue generating types even when the parser reports validation errors like this one:

type MyApi = OpenApiClientProvider(Schema, IgnoreParseErrors=true)

This suppresses the parse-error exception and prints warnings to stderr instead. It is particularly useful for schemas with vendor extensions or minor spec non-compliance like allowEmptyValue on query parameters.

If you still need strict validation of other parts of the schema, you can also download the schema locally, remove the allowEmptyValue fields, and point the provider at the cleaned-up file.

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