getschema.fix_type function: A valid null object is rejected

[daigotanaka]

v0.2.6

fix_type A null object (=dictionary) is not handled correctly. It results in

This test:

import getschema

null_entries = {
    "index": None,
    "array": [
        "1.5",
        None,
    ],
    "nested_field": None,
    "boolean_field": None,
    "number_field": None,
    "string_field": None,
}

def test_reject_null_object():
    schema = getschema.infer_schema(records)
    # This will pass
    _ = getschema.fix_type(null_entries, schema)

    schema["properties"]["nested_field"]["type"] = ["object"]
    try:
        _ = getschema.fix_type(null_entries, schema)
    except Exception as e:
        assert(str(e).startswith("Null object given at"))
    else:
        raise Exception("Supposed to fail with null value")

...will fail with:

KeyError: "property type (object) Expected a dict object.Got: <class 'NoneType'>...