“null” is not a valid type in swagger, nor is “anyOf” or multi-types.
From: 'Toe Dipper' via Swagger <swagger-swaggersocket@googlegroups.com>
Reply-To: "swagger-swaggersocket@googlegroups.com"
<swagger-swaggersocket@googlegroups.com>
Date: Friday, 23 June 2017 at 11:54
To: Swagger <swagger-swaggersocket@googlegroups.com>
Subject: Re: How to specify a property can be null or a reference
I am also curious for support for "nullable" fields. Support for "oneOf" and
"anyOf" is not quite the same thing. In JSON Schema, the "type" field can be
an array, e.g. to indicate a nullable field:
// In JSON Schema
{
"type": ["string", "null"]
}
// Or, using anyOf
{
"anyOf":[
{"type": "string"},
{"type": "null"}
]
}
The end result is equivalent to "anyOf"... arguably the JSON Schema spec should
simplify so that the type is always a string and "anyOf" is the only way to
support this "string OR null" value.
To clear, the "required" keyword does not cover this specific use case where a
property needs to exist, but its value might need to be null.
Relatedly, the "swagger-cli" npm package DOES consider the type: ["string",
"null"] as valid, but the online editor does not. Which is correct?
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