fix invalid query parameter

fastapi_code_generator/parser.py

@@ -76,7 +76,7 @@ def __str__(self) -> str:
 
     @cached_property
     def argument(self) -> str:
-        if not self.default and self.required:
+        if self.default is None and self.required:
             return f'{self.name}: {self.type_hint}'
         return f'{self.name}: {self.type_hint} = {self.default}'
 
@@ -168,7 +168,8 @@ def function_name(self) -> str:
         if self.operationId:
             name: str = self.operationId
         else:
-            name = f"{self.type}{re.sub(r'[/{}]', '_', self.path)}"
+            path = re.sub(r'/{|/', '_', self.snake_case_path).replace('}', '')
+            name = f"{self.type}{path}"
         return stringcase.snakecase(name)
 
     @cached_property
@@ -216,17 +217,18 @@ def get_parameter_type(
             required=parameter.get("required") or parameter.get("in") == "path",
         )
         self.imports.extend(field.imports)
-        represented_default = repr(schema.default)
         if orig_name != name:
-            default = f"Query({'...' if field.required else represented_default}, alias='{orig_name}')"
+            default: Optional[
+                str
+            ] = f"Query({'...' if field.required else repr(schema.default)}, alias='{orig_name}')"
             self.imports.append(Import(from_='fastapi', import_='Query'))
         else:
-            default = represented_default
+            default = repr(schema.default) if 'default' in parameter["schema"] else None
         return Argument(
             name=field.name,
             type_hint=field.type_hint,
             default=default,  # type: ignore
-            default_value=represented_default,  # type: ignore
+            default_value=schema.default,
             required=field.required,
         )
 

tests/data/expected/openapi/body_and_parameters/main.py

@@ -8,11 +8,16 @@
 
 from fastapi import FastAPI, Query
 
-from .models import Pet, PetForm, Pets
+from .models import Pet, PetForm
 
 app = FastAPI()
 
 
+@app.get('/food/{food_id}', response_model=None)
+def show_food_by_id(food_id: str) -> None:
+    pass
+
+
 @app.get('/pets', response_model=List[Pet])
 def list_pets(
     limit: Optional[int] = 0,
@@ -27,13 +32,13 @@ def post_pets(body: PetForm) -> None:
     pass
 
 
-@app.get('/pets/{pet_id}', response_model=Pets)
-def show_pet_by_id(pet_id: str = Query(..., alias='petId')) -> Pets:
+@app.get('/pets/{pet_id}', response_model=Pet)
+def show_pet_by_id(pet_id: str = Query(..., alias='petId')) -> Pet:
     pass
 
 
 @app.put('/pets/{pet_id}', response_model=None)
-def put_pets__pet_id_(
+def put_pets_pet_id(
     pet_id: str = Query(..., alias='petId'), body: PetForm = None
 ) -> None:
     pass

tests/data/openapi/body_and_parameters.yaml

@@ -45,8 +45,9 @@ paths:
           content:
             application/json:
               schema:
+                type: array
                 items:
-                        $ref: "#/components/schemas/Pet"
+                 - $ref: "#/components/schemas/Pet"
         default:
           description: unexpected error
           content:
@@ -91,7 +92,7 @@ paths:
           content:
             application/json:
               schema:
-                $ref: "#/components/schemas/Pets"
+                $ref: "#/components/schemas/Pet"
         default:
           description: unexpected error
           content:
@@ -130,6 +131,27 @@ paths:
       passthroughBehavior: when_no_templates
       httpMethod: POST
       type: aws_proxy
+  /food/{food_id}:
+    get:
+      summary: Info for a specific pet
+      operationId: showFoodById
+      tags:
+        - foods
+      parameters:
+        - name: food_id
+          in: path
+          description: The id of the food to retrieve
+          schema:
+            type: string
+      responses:
+        '200':
+          description: Expected response to a valid request
+    x-amazon-apigateway-integration:
+      uri:
+        Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${PythonVersionFunction.Arn}/invocations
+      passthroughBehavior: when_no_templates
+      httpMethod: POST
+      type: aws_proxy
 components:
   schemas:
     Pet: