typing.List[AvroModel] works but typing.Dict[str, AvroModel] seems to fail

[mattreid9956]

Describe the bug
Should dictionary representations be deserializable when using "avro-json" I find a case where "avro" works but "avro-json" does not (ps. cool repo!).

To Reproduce
Take your original Address+User examples and changing typing.List -> typing.Dict[str,Address]

import typing
import dataclasses
from dataclasses_avroschema import AvroModel

@dataclasses.dataclass
class Address(AvroModel):
    "An Address"
    street: str
    street_number: int

@dataclasses.dataclass
class User(AvroModel):
    "User with multiple Address"
    name: str
    age: int
    addresses: typing.Dict[str, Address]

user = User.fake()

# Fails with error "ValueError: no value and no default" raised from generator fastavro.json_reader(input_stream, schema)
serialization_type = 'avro-json'
s = user.serialize(serialization_type=serialization_type)
User.deserialize(s, serialization_type=serialization_type)

Expected behavior
The same output as with the "avro" serialization type (as below) - just wanted to report this and confirm that this is the expected behaviour?

# Works fine
serialization_type = 'avro'
s = user.serialize(serialization_type=serialization_type)
User.deserialize(s, serialization_type=serialization_type)

python: 3.7.8
dataclasses-avroschema==0.30.0
fastavro==1.5.2

[marcosschroh]

Hi @mattreid9956

Thanks for reporting the issue. It looks like it's a bug in fastavro. I have reported the issue: fastavro/fastavro#629