Adding a mapping for the fields.Method

[psaiz]

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Description

The current user_administration fails because the marshmallow schema fails to convert to json, since it needs something for a field called is_current_user which maps to a method. This is a workaround. It should be better handled during ticket

#174

It addresses inveniosoftware/invenio-app-rdm#2232

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[ppanero]

question: how does jsonschema behaves with None or null as type? This value will be used below

schema_dict[field].update({
                    "type": custom_mapping[field_type_name],
                })

We might need to add a check in the jsonify_schema function. Or tests....

(edit) if fails...

>>> from jsonschema import validate
>>>
>>> schema = {
...       "type" : "object",
...       "properties" : {
...           "price" : {"type" : "number"},
...           "name" : {"type" : None},
...       },
...   }
>>>
>>> validate(instance={"name" : "Eggs", "price" : 34.99}, schema=schema)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/ppanero/.virtualenvs/invenio-rdm-migrator/lib/python3.9/site-packages/jsonschema/validators.py", line 1117, in validate
    cls.check_schema(schema)
  File "/Users/ppanero/.virtualenvs/invenio-rdm-migrator/lib/python3.9/site-packages/jsonschema/validators.py", line 231, in check_schema
    raise exceptions.SchemaError.create_from(error)
jsonschema.exceptions.SchemaError: None is not valid under any of the given schemas

Failed validating 'anyOf' in metaschema['allOf'][1]['properties']['properties']['additionalProperties']['$dynamicRef']['allOf'][3]['properties']['type']:
    {'anyOf': [{'$ref': '#/$defs/simpleTypes'},
               {'items': {'$ref': '#/$defs/simpleTypes'},
                'minItems': 1,
                'type': 'array',
                'uniqueItems': True}]}

On schema['properties']['name']['type']:
    None