Fix, fix not support default value is none

Author: so1n

example/example_proto/common/p2p_validate.proto

@@ -1221,7 +1221,7 @@ message MessageRules {
     oneof default_config {
         // The default value corresponding to the field, if not set,
         // the default value is the default value of the corresponding type of the field
-        float default = 9;
+        string  default = 9;
         // The default value factory function corresponding to the field, supports template variables,
         // such as `p2p@import|uuid|uuid4`
         string  default_factory = 10;

example/example_proto/p2p_validate/demo.proto

@@ -608,4 +608,5 @@ message OptionalMessage{
     optional MessageIgnoredTest  my_message2 = 2;
     MessageIgnoredTest  my_message3 = 3[(p2p_validate.rules).message.required=true];
     MessageIgnoredTest  my_message4 = 4;
+    optional MessageIgnoredTest my_message_5 = 5[(p2p_validate.rules).message.default_template="p2p@builtin|None"];
 }

example/example_proto/p2p_validate_by_comment/demo.proto

@@ -679,4 +679,6 @@ message OptionalMessage{
     // p2p: {"required": true}
     MessageIgnoredTest  my_message3 = 3;
     MessageIgnoredTest  my_message4 = 4;
+    // p2p: {"default_template": "p2p@builtin|None"}
+    optional MessageIgnoredTest my_message_5 = 5;
 }

example/proto_3_20_pydanticv1/demo_gen_code.py

@@ -1,5 +1,5 @@
 # This is an automatically generated file, please do not change
-# gen by protobuf_to_pydantic[v0.3.0.4](https://github.com/so1n/protobuf_to_pydantic)
+# gen by protobuf_to_pydantic[v0.3.1.0](https://github.com/so1n/protobuf_to_pydantic)
 # Protobuf Version: 3.20.3
 # Pydantic Version: 1.10.7
 import typing

example/proto_3_20_pydanticv1/demo_gen_code_by_p2p.py

@@ -1,5 +1,5 @@
 # This is an automatically generated file, please do not change
-# gen by protobuf_to_pydantic[v0.3.0.4](https://github.com/so1n/protobuf_to_pydantic)
+# gen by protobuf_to_pydantic[v0.3.1.0](https://github.com/so1n/protobuf_to_pydantic)
 # Protobuf Version: 3.20.3
 # Pydantic Version: 1.10.7
 import typing
@@ -481,6 +481,7 @@ class OptionalMessage(BaseModel):
     my_message2: typing.Optional[MessageIgnoredTest] = Field(default_factory=MessageIgnoredTest)
     my_message3: MessageIgnoredTest = Field()
     my_message4: MessageIgnoredTest = Field(default_factory=MessageIgnoredTest)
+    my_message_5: typing.Optional[MessageIgnoredTest] = Field(default=None)
 
 
 class RepeatedTest(BaseModel):

example/proto_3_20_pydanticv1/demo_gen_code_by_pgv.py

@@ -1,5 +1,5 @@
 # This is an automatically generated file, please do not change
-# gen by protobuf_to_pydantic[v0.3.0.4](https://github.com/so1n/protobuf_to_pydantic)
+# gen by protobuf_to_pydantic[v0.3.1.0](https://github.com/so1n/protobuf_to_pydantic)
 # Protobuf Version: 3.20.3
 # Pydantic Version: 1.10.7
 import typing

example/proto_3_20_pydanticv1/demo_gen_code_by_text_comment_protobuf_field.py

@@ -1,5 +1,5 @@
 # This is an automatically generated file, please do not change
-# gen by protobuf_to_pydantic[v0.3.0.4](https://github.com/so1n/protobuf_to_pydantic)
+# gen by protobuf_to_pydantic[v0.3.1.0](https://github.com/so1n/protobuf_to_pydantic)
 # Protobuf Version: 3.20.3
 # Pydantic Version: 1.10.7
 import typing

example/proto_3_20_pydanticv1/demo_gen_code_by_text_comment_pyi.py

@@ -1,5 +1,5 @@
 # This is an automatically generated file, please do not change
-# gen by protobuf_to_pydantic[v0.3.0.4](https://github.com/so1n/protobuf_to_pydantic)
+# gen by protobuf_to_pydantic[v0.3.1.0](https://github.com/so1n/protobuf_to_pydantic)
 # Protobuf Version: 3.20.3
 # Pydantic Version: 1.10.7
 import typing

example/proto_3_20_pydanticv1/example/example_proto/common/p2p_validate_pb2.py

@@ -2791,7 +2791,7 @@ class MessageRules(google.protobuf.message.Message):
     enable: builtins.bool
     """Whether to enable this field, if not, the generated Model will not carry this field"""
 
-    default: builtins.float
+    default: typing.Text
     """The default value corresponding to the field, if not set,
     the default value is the default value of the corresponding type of the field
     """
@@ -2838,7 +2838,7 @@ class MessageRules(google.protobuf.message.Message):
         *,
         skip: typing.Optional[builtins.bool] = ...,
         enable: typing.Optional[builtins.bool] = ...,
-        default: builtins.float = ...,
+        default: typing.Text = ...,
         default_factory: typing.Text = ...,
         miss_default: builtins.bool = ...,
         required: builtins.bool = ...,