"null value support" for query parameter in swagger-ui ?

[Rick Sun]

Looks like all related tickets to https://github.com/OAI/OpenAPI-Specification/issues/229 were closed about a month ago. Just wonder if swagger-ui supports query parameter without value now? If yes, what is the syntax? I tried adding {"x-nullable" : true} to the query parameter definition, no use. Thanks for any info.

[Ron Ratovsky]

Query parameters with no value can be down with allowEmptyValue. ‘null’ is not an empty value.

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[Rick Sun]

Ron, thanks for the answer. 

My URL needs be something like "http://127.0.0.1/api?param" where "param" is a parameter without value. This is not possible with the current swagger-ui because a value is always expected. So I am using "http://127.0.0.1/api?param=true" as a workaround using this definition:

{

        in: "query",

        name: "param",

        type: "string",

        required: false,

        enum : ["true"]

};

I tried "allowEmptyValue" : true or "x-nullable" : true, or type : "null", none of these make any difference (type: "null" is not accepted). Ideally, what needed is a checkbox in swagger-ui for the parameter: when checked, just send "?param" without any value. Is this possible now?

"empty value" probably means "?param=". "null value" probably means "?param" without "=". These terms may mean different things, but I am only looking for "?param" without = sign.

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[Ron Ratovsky]

A null value would be ?param=null, not ?param.

x-nullable I not supported in the ui as it’s not part of the spec. If allowEmptyValue isn’t supported, I’d suggest opening a ticket about it.

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[Rick Sun]

Ron, thanks. Just opened "allowEmptyValue not implemented? #1934".

Probably it is supported, but I do not have the correct setting for it, so I put a question mark.