Support datamodel-code-generator 0.59

fastapi_code_generator/parser.py

@@ -644,22 +644,27 @@ def _has_non_object_discriminator_variant(self, obj: JsonSchemaObject) -> bool:
         )
 
     def _is_object_discriminator_variant(
-        self, schema: JsonSchemaObject, seen_refs: set[str] | None = None
+        self, schema: JsonSchemaObject | bool, seen_refs: set[str] | None = None
     ) -> bool:
+        if not isinstance(schema, JsonSchemaObject):
+            return False
+        schema_obj = schema
         if seen_refs is None:
             seen_refs = set()
-        if schema.ref:
-            if schema.ref in seen_refs:
+        if schema_obj.ref:
+            if schema_obj.ref in seen_refs:
                 return False
-            seen_refs.add(schema.ref)
-            schema = JsonSchemaObject.model_validate(self.get_ref_model(schema.ref))
-        if schema.is_object or schema.properties:
+            seen_refs.add(schema_obj.ref)
+            schema_obj = JsonSchemaObject.model_validate(
+                self.get_ref_model(schema_obj.ref)
+            )
+        if schema_obj.is_object or schema_obj.properties:
             return True
-        if not schema.allOf:
+        if not schema_obj.allOf:
             return False
         return any(
             self._is_object_discriminator_variant(member, seen_refs.copy())
-            for member in schema.allOf
+            for member in schema_obj.allOf
         )
 
     def _get_upload_file_type(

pyproject.toml

@@ -28,7 +28,7 @@ classifiers = [
 dynamic = ["version"]
 dependencies = [
   "click>=8.1.8,<8.2",
-  "datamodel-code-generator[http]>=0.56.1,<0.57",
+  "datamodel-code-generator[http]>=0.59,<0.60",
   "jinja2>=2.11.2,<4",
   "pydantic>=2.12,<3",
   "pysnooper>=0.4.1,<2",

tests/data/expected/openapi/default_template/shadowed_imports/main.py

@@ -4,7 +4,7 @@
 
 from __future__ import annotations
 
-from datetime import date as date_aliased
+from datetime import date
 from typing import Optional
 
 from fastapi import FastAPI
@@ -17,5 +17,5 @@
 
 
 @app.get('/actions/', response_model=None)
-def get_actions_(due: Optional[date_aliased] = None) -> None:
+def get_actions_(due: Optional[date] = None) -> None:
     pass

tests/test_parser.py

@@ -314,3 +314,29 @@ def test_get_field_extras_checks_one_of_and_any_of_variants() -> None:
         },
         {},
     )
+
+
+def test_get_field_extras_removes_discriminator_for_boolean_variant() -> None:
+    parser = OpenAPIParser(
+        "openapi: 3.0.0\ninfo: {title: Test, version: '1.0'}\npaths: {}\n"
+    )
+    assert_field_extras(
+        parser,
+        {
+            "oneOf": [
+                True,
+                {
+                    "type": "object",
+                    "properties": {
+                        "kind": {
+                            "type": "string",
+                        },
+                    },
+                },
+            ],
+            "discriminator": {
+                "propertyName": "kind",
+            },
+        },
+        {},
+    )