Problem with recursive - self references

[hoangcia]

Hi, I just checked an examples of recursive reference in the examples folder. In the sample file examples/recursive.html, if I change the schema like this:

{
        // The schema for the editor
        schema: {
            title: "Person",
            $ref: "#/definitions/person",
            definitions: {
                experson:{
                    type: "object",
                    id: "experson",
                    properties: {
                        lname: {
                            type: "string",
                            title: "lastname"
                        }
                    }
                },
                person: {
                    type: "object",
                    id: "person",
                    // The object will start with only these properties
                    defaultProperties: [
                        "fname",
                        "lname",
                        "bestFriends",
                        "coworkers"
                    ],
                    patternProperties: {
                      // Self-referntial schema in patternProperties
                      "^cousin_[0-9]+$": {
                        $ref: "#/definitions/person"
                      }
                    },
                    properties: {
                        fname: {
                            title: "first name",
                            type: "string"
                        },
                        lname: {
                            title: "last name",
                            type: "string"
                        },
                        bestFriends: {
                          title: "best friends",
                          type: "array",
                          items:{
                              oneOf: [
                                {
                                  title: "exPerson",
                                  $ref: "#/definitions/experson"
                                },
                                // Self-referential schema as 2nd choice in oneOf
                                {
                                  title: "person",
                                  $ref: "#/definitions/person"
                                }
                              ]
                          }
                        },
                        coworkers: {
                          type: "array",
                          // Self-referential schema in array items
                          items: {
                            title: "Coworker",                            
                            $ref: "#/definitions/person"                                                    
                          }
                        },
                        // Self-referential schemas in non-default properties
                        mother: {
                          title: "mother",
                          $ref: "#/definitions/person"
                        }
                    }
                },
                year: {
                    type: "integer",
                    pattern: "^[0-9]{4}$",
                    minimum: 1900,
                    maximum: 2100
                }
            }
        }
    }

I added an additional schema called "experson" and a new property named "bestfriends" whose type is an array of "person" or "experson". Then I got an error in Developer Tools in my browser: (see attachment)

Uncaught TypeError: Converting circular structure to JSON

And the form is generated incorrectly.

Anyone has idea about this issue?

[stringfellow]

Just tried this in the live demo, indeed it does fail (direct link)

[hubertnguyen]

The "Uncaught TypeError: Converting circular structure to JSON" happens in the demo page because the author uses JSON.stringify for UI purposes. In this case, the author wanted to save the current schema as base64 data.

The library can handle properly formed definitions with circular references.