Empty list for required fields ?

[leplatrem]

In the specs, it says that Omitting this keyword has the same behavior as an empty array. .

However, using jsonschema, there seems to be a rule validating the number of elements:

>>> import jsonschema
>>> schema = {"required": []}
>>> jsonschema.validate({}, schema)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/mathieu/Code/Mozilla/kinto/.venv/lib/python3.5/site-packages/jsonschema/validators.py", line 540, in validate
    cls.check_schema(schema)
  File "/home/mathieu/Code/Mozilla/kinto/.venv/lib/python3.5/site-packages/jsonschema/validators.py", line 83, in check_schema
    raise SchemaError.create_from(error)
jsonschema.exceptions.SchemaError: [] is too short

Failed validating 'minItems' in schema['properties']['required']:
    {'items': {'type': 'string'},
     'minItems': 1,
     'type': 'array',
     'uniqueItems': True}

On instance['required']:
    []
>>> 

Let me know if I can help and submit a fix :)

Thanks!

[Julian]

That's the spec for draft 6, not draft 4, and that's a thing that changed in draft 6.

Support for draft 6 is happening in #337 on the draft-06 branch, so definitely welcome patches on that branch!