fix: avro-json serialization with defaults

requirements.txt

@@ -1,4 +1,4 @@
-fastavro
+fastavro==1.3.0
 inflect
 pytz
 faust==1.9.0

setup.py

@@ -18,7 +18,7 @@
     long_description=long_description,
     long_description_content_type="text/markdown",
     author="Marcos Schroh",
-    install_requires=["inflect", "fastavro", "pytz", "dacite", "faker",],
+    install_requires=["inflect", "fastavro==1.3.0", "pytz", "dacite", "faker",],
     author_email="schrohm@gmail.com",
     url="https://github.com/marcosschroh/dataclasses-avroschema",
     download_url="",

tests/serialization/test_nested_schema_serialization.py

@@ -93,7 +93,7 @@ class User(AvroModel):
     assert user.serialize() == avro_binary
 
     # Bug in fastavro
-    # assert user.serialize(serialization_type="avro-json") == avro_json_binary
+    assert user.serialize(serialization_type="avro-json") == avro_json_binary
 
     assert User.deserialize(avro_binary, create_instance=False) == expected
     assert User.deserialize(avro_json_binary, serialization_type="avro-json", create_instance=False) == expected

tests/serialization/test_primitive_types_serialization.py

@@ -32,7 +32,6 @@ class User(AvroModel):
         encoded: bytes = b"hola"
 
     data = {"name": "marcos", "age": 20, "has_pets": False, "money": 100.0, "encoded": b"hola"}
-
     data_json = {"name": "marcos", "age": 20, "has_pets": False, "money": 100.0, "encoded": "hola"}
 
     user = User()
@@ -47,6 +46,20 @@ class User(AvroModel):
 
     assert user.to_json() == data_json
 
+    # check that works with schema evolution
+    user = User(name="Juan", age=30)
+    avro_json = user.serialize(serialization_type="avro-json")
+
+    data = {"name": "Juan", "age": 30, "has_pets": False, "money": 100.0, "encoded": b"hola"}
+    data_json = {"name": "Juan", "age": 30, "has_pets": False, "money": 100.0, "encoded": "hola"}
+
+    # assert user.deserialize(avro_binary, create_instance=False) == data
+    assert user.deserialize(avro_json, serialization_type="avro-json", create_instance=False) == data
+
+    # assert user.deserialize(avro_binary) == user
+    assert user.deserialize(avro_json, serialization_type="avro-json") == user
+    assert user.to_json() == data_json
+
 
 def test_primitive_types_with_nulls():
     @dataclass