Update datamodel-code-generator, add support for modular references, add additional tests

Author: sternakt

.gitignore

@@ -176,4 +176,6 @@ fabric.properties
 
 .idea
 
+.vscode/
+
 version.py

fastapi_code_generator/__main__.py

@@ -28,7 +28,7 @@
 
 BUILTIN_VISITOR_DIR = Path(__file__).parent / "visitors"
 
-MODEL_PATH: Path = Path("models.py")
+MODEL_PATH: Path = Path("models")
 
 
 def dynamic_load_module(module_path: Path) -> Any:
@@ -63,7 +63,7 @@ def main(
         DataModelType.PydanticBaseModel.value, "--output-model-type", "-d"
     ),
     python_version: PythonVersion = typer.Option(
-        PythonVersion.PY_38.value, "--python-version", "-p"
+        PythonVersion.PY_39.value, "--python-version", "-p"
     ),
 ) -> None:
     input_name: str = input_file
@@ -73,7 +73,7 @@ def main(
         input_text = f.read()
 
     if model_file:
-        model_path = Path(model_file).with_suffix('.py')
+        model_path = Path(model_file)
     else:
         model_path = MODEL_PATH
 
@@ -119,7 +119,7 @@ def generate_code(
     generate_routers: Optional[bool] = None,
     specify_tags: Optional[str] = None,
     output_model_type: DataModelType = DataModelType.PydanticBaseModel,
-    python_version: PythonVersion = PythonVersion.PY_38,
+    python_version: PythonVersion = PythonVersion.PY_39,
 ) -> None:
     if not model_path:
         model_path = MODEL_PATH
@@ -149,14 +149,16 @@ def generate_code(
 
     with chdir(output_dir):
         models = parser.parse()
-    output = output_dir / model_path
     if not models:
         # if no models (schemas), just generate an empty model file.
-        modules = {output: ("", input_name)}
+        modules = {output_dir / model_path.with_suffix('.py'): ("", input_name)}
     elif isinstance(models, str):
-        modules = {output: (models, input_name)}
+        modules = {output_dir / model_path.with_suffix('.py'): (models, input_name)}
     else:
-        raise Exception('Modular references are not supported in this version')
+        modules = {
+            output_dir / model_path / module_name[0]: (model.body, input_name)
+            for module_name, model in models.items()
+        }
 
     environment: Environment = Environment(
         loader=FileSystemLoader(

fastapi_code_generator/parser.py

@@ -2,6 +2,7 @@
 
 import pathlib
 import re
+from functools import cached_property
 from typing import (
     Any,
     Callable,
@@ -42,7 +43,6 @@
     ResponseObject,
 )
 from datamodel_code_generator.types import DataType, DataTypeManager, StrictTypes
-from datamodel_code_generator.util import cached_property
 from pydantic import BaseModel, ValidationInfo
 
 RE_APPLICATION_JSON_PATTERN: Pattern[str] = re.compile(r'^application/.*json$')
@@ -153,7 +153,7 @@ def function_name(self) -> str:
         return stringcase.snakecase(name)
 
 
-@snooper_to_methods(max_variable_length=None)
+@snooper_to_methods()
 class OpenAPIParser(OpenAPIModelParser):
     def __init__(
         self,
@@ -166,7 +166,7 @@ def __init__(
         base_class: Optional[str] = None,
         custom_template_dir: Optional[pathlib.Path] = None,
         extra_template_data: Optional[DefaultDict[str, Dict[str, Any]]] = None,
-        target_python_version: PythonVersion = PythonVersion.PY_37,
+        target_python_version: PythonVersion = PythonVersion.PY_39,
         dump_resolve_reference_action: Optional[Callable[[Iterable[str]], str]] = None,
         validation: bool = False,
         field_constraints: bool = False,