Failing to parse two-dimensional nested array of ints

[kevinashaw]

Just found this project today and it has been very helpful, but I ran into a problem with nested arrays.
The following avro schema:

{
    "namespace": "com.company.code",
    "type": "record",
    "name": "MyAvroSchema",
    "doc" : "...",
    "fields": [
        {
            "name": "MyArray",
            "type": {
                "type": "array",
                "items": {
                    "type": {"type": "array","items": "int"}
                }
            }
        }
    ]
}

generates the following error:

Traceback (most recent call last):
  File "/Users/user/miniconda3/envs/arrhythmia/lib/python3.9/code.py", line 90, in runcode
    exec(code, self.locals)
  File "<input>", line 1, in <module>
  File "/Users/user/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/222.4459.20/PyCharm.app/Contents/plugins/python/helpers/pydev/_pydev_bundle/pydev_umd.py", line 198, in runfile
    pydev_imports.execfile(filename, global_vars, local_vars)  # execute the script
  File "/Users/user/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/222.4459.20/PyCharm.app/Contents/plugins/python/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "/Users/user/arrhythmia/file_schemas/validate_schema.py", line 5, in <module>
    parsed_schema = schema.parse()
  File "/Users/user/miniconda3/envs/arrhythmia/lib/python3.9/site-packages/avro_validator/schema.py", line 28, in parse
    return RecordType.build(schema, skip_extra_keys=skip_extra_keys)
  File "/Users/user/miniconda3/envs/arrhythmia/lib/python3.9/site-packages/avro_validator/avro_types.py", line 812, in build
    record_type.__fields = {
  File "/Users/user/miniconda3/envs/arrhythmia/lib/python3.9/site-packages/avro_validator/avro_types.py", line 813, in <dictcomp>
    field['name']: RecordTypeField.build(
  File "/Users/user/miniconda3/envs/arrhythmia/lib/python3.9/site-packages/avro_validator/avro_types.py", line 585, in build
    field.__type = cls.__build_field_type(json_repr, custom_fields)
  File "/Users/user/miniconda3/envs/arrhythmia/lib/python3.9/site-packages/avro_validator/avro_types.py", line 545, in __build_field_type
    return cls._get_field_from_json(json_repr['type'], custom_fields)
  File "/Users/user/miniconda3/envs/arrhythmia/lib/python3.9/site-packages/avro_validator/avro_types.py", line 210, in _get_field_from_json
    return getattr(sys.modules[__name__], FIELD_MAPPING[field_type['type']]).build(field_type, custom_fields)
  File "/Users/user/miniconda3/envs/arrhythmia/lib/python3.9/site-packages/avro_validator/avro_types.py", line 1016, in build
    array_type.__items = ArrayType._get_field_from_json(json_repr['items'], custom_fields)
  File "/Users/user/miniconda3/envs/arrhythmia/lib/python3.9/site-packages/avro_validator/avro_types.py", line 210, in _get_field_from_json
    return getattr(sys.modules[__name__], FIELD_MAPPING[field_type['type']]).build(field_type, custom_fields)
TypeError: unhashable type: 'dict'

If I remove the inner array it parses correctly.

[kevinashaw]

As discussed here in StackOverflow, there was an error in my schema. That said, the avro_validator code may wish to handle this particular case.