Validation for optional objects

[nitsnwits]

First of all, thank you for a great library. I've found it really useful and its 'options' features is the one which I could not find in other libraries.

I was working with different schema validations for a project. Let's say, my whole JSON body is empty and the schema defines all the fields are optional.

1. Is there a way to define that even though all the fields are optional, at least one (any of it) should be present in the body and the body should not be empty?
2. If my JSON body has two fields A and B and the schema defines A and B as optional. Is there a way to define that if A is present, then, B is required?

It may not be a bug, but I could find the documentation supporting such features.

Thank you for your time.

Neeraj

[zaggino]

By the specification, you should use anyOf for the 1) but to make it easier for you can use custom format defined like this:

ZSchema.registerFormat("hasAtLeastOneProperty", function (obj) {
    return Object.keys(obj).length > 0;
});

[zaggino]

For 2) you should use dependencies, take a look at http://json-schema.org/latest/json-schema-validation.html#anchor70

Here's a test suite that might give you more ideas on how to use it:

{
        "description": "dependencies",
        "schema": {
            "dependencies": {"bar": ["foo"]}
        },
        "tests": [
            {
                "description": "neither",
                "data": {},
                "valid": true
            },
            {
                "description": "nondependant",
                "data": {"foo": 1},
                "valid": true
            },
            {
                "description": "with dependency",
                "data": {"foo": 1, "bar": 2},
                "valid": true
            },
            {
                "description": "missing dependency",
                "data": {"bar": 2},
                "valid": false
            },
            {
                "description": "ignores non-objects",
                "data": "foo",
                "valid": true
            }
        ]
    }

https://github.com/json-schema/JSON-Schema-Test-Suite/blob/develop/tests/draft4/dependencies.json

[nitsnwits]

Thank you for the feedback, @zaggino That really helped solve me the problem. Closing this issue.