Add option to enable circular reference

[VolodymyrMachekhin]

Hello team! Thank you again for creating and maintaining the library.
I have a question about the circular references. When I try to use a circular reference in spec it throws an error during the initialization.

ReferenceError: Circular $ref pointer found at...

The error is thrown by json-schema-ref-parser
While json-schema-ref-parser allows the circular refs, in the source code I found that oas-chow-chow puts a hardcoded option to the parser

dereference: {
  circular: false,
},

Is there any specific reason to it, and can it be changed?

[supertong]

Hey @VolodymyrMachekhin , AJV doesn't support circular reference for security reasons. You can find it here.

[VolodymyrMachekhin]

Thank you @supertong for the reply. I found this in their documentation, and managed to modify chow-chow to compile the schema with circular reference.

if in chow-chow index we modify the ref parser call to parse schema without dereferencing

  public static async create(
    document: object,
    options: Partial<ChowOptions> = {}
  ) {
    const res = await $RefParser.parse(document, {
      continueOnError: false,
      resolve: {
        external: false,
      },
    });
    return new ChowChow(res as OpenAPIObject, options);
  }

and inside CompileSchema.ts before this.validator = ajvInstance.compile(schemaObject); is called the schema object is provided with components from await $RefParser.parse(document, {... then it compiles and works.