🔒 Fix constraining return values to model

fastapi/__init__.py

@@ -1,6 +1,6 @@
 """FastAPI framework, high performance, easy to learn, fast to code, ready for production"""
 
-__version__ = "0.1.2"
+__version__ = "0.1.3"
 
 from .applications import FastAPI
 from .routing import APIRouter

fastapi/routing.py

@@ -1,5 +1,6 @@
 import asyncio
 import inspect
+import logging
 from typing import Any, Callable, List, Optional, Type
 
 from fastapi import params
@@ -47,6 +48,7 @@ def get_app(
     is_body_form = body_field and isinstance(body_field.schema, params.Form)
 
     async def app(request: Request) -> Response:
+        try:
             body = None
             if body_field:
                 if is_body_form:
@@ -59,9 +61,17 @@ def get_app(
                             body[field] = value
                 else:
                     body = await request.json()
+        except Exception:
+            raise HTTPException(
+                status_code=400, detail="There was an error parsing the body"
+            )
+        try:
             values, errors = await solve_dependencies(
                 request=request, dependant=dependant, body=body
             )
+        except Exception as e:
+            logging.error("Error solving dependencies", e)
+            raise HTTPException(status_code=400, detail="Error processing request")
         if errors:
             errors_out = ValidationError(errors)
             raise HTTPException(
@@ -77,7 +87,10 @@ def get_app(
                 return raw_response
             if isinstance(raw_response, BaseModel):
                 return content_type(
-                    content=jsonable_encoder(raw_response), status_code=status_code
+                    content=serialize_response(
+                        field=response_field, response=raw_response
+                    ),
+                    status_code=status_code,
                 )
             errors = []
             try:

tests/main.py

@@ -67,87 +67,87 @@ def get_path_param_required_id(item_id: str = Path(...)):
 
 
 @app.get("/path/param-minlength/{item_id}")
-def get_path_param_min_length(item_id: str = Path(..., min_length = 3)):
+def get_path_param_min_length(item_id: str = Path(..., min_length=3)):
     return item_id
 
 
 @app.get("/path/param-maxlength/{item_id}")
-def get_path_param_max_length(item_id: str = Path(..., max_length = 3)):
+def get_path_param_max_length(item_id: str = Path(..., max_length=3)):
     return item_id
 
 
 @app.get("/path/param-min_maxlength/{item_id}")
-def get_path_param_min_max_length(item_id: str = Path(..., max_length = 3, min_length = 2)):
+def get_path_param_min_max_length(item_id: str = Path(..., max_length=3, min_length=2)):
     return item_id
 
 
 @app.get("/path/param-gt/{item_id}")
-def get_path_param_gt(item_id: float = Path(..., gt = 3)):
+def get_path_param_gt(item_id: float = Path(..., gt=3)):
     return item_id
 
 
 @app.get("/path/param-gt0/{item_id}")
-def get_path_param_gt0(item_id: float = Path(..., gt = 0)):
+def get_path_param_gt0(item_id: float = Path(..., gt=0)):
     return item_id
 
 
 @app.get("/path/param-ge/{item_id}")
-def get_path_param_ge(item_id: float = Path(..., ge = 3)):
+def get_path_param_ge(item_id: float = Path(..., ge=3)):
     return item_id
 
 
 @app.get("/path/param-lt/{item_id}")
-def get_path_param_lt(item_id: float = Path(..., lt = 3)):
+def get_path_param_lt(item_id: float = Path(..., lt=3)):
     return item_id
 
 
 @app.get("/path/param-lt0/{item_id}")
-def get_path_param_lt0(item_id: float = Path(..., lt = 0)):
+def get_path_param_lt0(item_id: float = Path(..., lt=0)):
     return item_id
 
 
 @app.get("/path/param-le/{item_id}")
-def get_path_param_le(item_id: float = Path(..., le = 3)):
+def get_path_param_le(item_id: float = Path(..., le=3)):
     return item_id
 
 
 @app.get("/path/param-lt-gt/{item_id}")
-def get_path_param_lt_gt(item_id: float = Path(..., lt = 3, gt = 1)):
+def get_path_param_lt_gt(item_id: float = Path(..., lt=3, gt=1)):
     return item_id
 
 
 @app.get("/path/param-le-ge/{item_id}")
-def get_path_param_le_ge(item_id: float = Path(..., le = 3, ge = 1)):
+def get_path_param_le_ge(item_id: float = Path(..., le=3, ge=1)):
     return item_id
 
 
 @app.get("/path/param-lt-int/{item_id}")
-def get_path_param_lt_int(item_id: int = Path(..., lt = 3)):
+def get_path_param_lt_int(item_id: int = Path(..., lt=3)):
     return item_id
 
 
 @app.get("/path/param-gt-int/{item_id}")
-def get_path_param_gt_int(item_id: int = Path(..., gt = 3)):
+def get_path_param_gt_int(item_id: int = Path(..., gt=3)):
     return item_id
 
 
 @app.get("/path/param-le-int/{item_id}")
-def get_path_param_le_int(item_id: int = Path(..., le = 3)):
+def get_path_param_le_int(item_id: int = Path(..., le=3)):
     return item_id
 
 
 @app.get("/path/param-ge-int/{item_id}")
-def get_path_param_ge_int(item_id: int = Path(..., ge = 3)):
+def get_path_param_ge_int(item_id: int = Path(..., ge=3)):
     return item_id
 
 
 @app.get("/path/param-lt-gt-int/{item_id}")
-def get_path_param_lt_gt_int(item_id: int = Path(..., lt = 3, gt = 1)):
+def get_path_param_lt_gt_int(item_id: int = Path(..., lt=3, gt=1)):
     return item_id
 
 
 @app.get("/path/param-le-ge-int/{item_id}")
-def get_path_param_le_ge_int(item_id: int = Path(..., le = 3, ge = 1)):
+def get_path_param_le_ge_int(item_id: int = Path(..., le=3, ge=1)):
     return item_id
 
 

tests/test_path.py

@@ -38,27 +38,49 @@ response_not_valid_float = {
     ]
 }
 
-response_at_least_3 = {"detail":[{"loc":["path","item_id"],"msg":"ensure this value has at least 3 characters","type":"value_error.any_str.min_length","ctx":{"limit_value":3}}]}
+response_at_least_3 = {
+    "detail": [
+        {
+            "loc": ["path", "item_id"],
+            "msg": "ensure this value has at least 3 characters",
+            "type": "value_error.any_str.min_length",
+            "ctx": {"limit_value": 3},
+        }
+    ]
+}
 
 
-response_at_least_2 = {"detail":[{"loc":["path","item_id"],"msg":"ensure this value has at least 2 characters","type":"value_error.any_str.min_length","ctx":{"limit_value":2}}]}
+response_at_least_2 = {
+    "detail": [
+        {
+            "loc": ["path", "item_id"],
+            "msg": "ensure this value has at least 2 characters",
+            "type": "value_error.any_str.min_length",
+            "ctx": {"limit_value": 2},
+        }
+    ]
+}
 
 
-response_maximum_3 = {"detail":[{"loc":["path","item_id"],"msg":"ensure this value has at most 3 characters","type":"value_error.any_str.max_length","ctx":{"limit_value":3}}]}
+response_maximum_3 = {
+    "detail": [
+        {
+            "loc": ["path", "item_id"],
+            "msg": "ensure this value has at most 3 characters",
+            "type": "value_error.any_str.max_length",
+            "ctx": {"limit_value": 3},
+        }
+    ]
+}
 
 
 response_greater_than_3 = {
     "detail": [
         {
-      "loc": [
+            "loc": ["path", "item_id"],
-        "path",
-        "item_id"
-      ],
             "msg": "ensure this value is greater than 3",
             "type": "value_error.number.not_gt",
-      "ctx": {
+            "ctx": {"limit_value": 3},
-        "limit_value": 3
-      }
         }
     ]
 }
@@ -67,15 +89,10 @@ response_greater_than_3 = {
 response_greater_than_0 = {
     "detail": [
         {
-      "loc": [
+            "loc": ["path", "item_id"],
-        "path",
-        "item_id"
-      ],
             "msg": "ensure this value is greater than 0",
             "type": "value_error.number.not_gt",
-      "ctx": {
+            "ctx": {"limit_value": 0},
-        "limit_value": 0
-      }
         }
     ]
 }
@@ -84,35 +101,34 @@ response_greater_than_0 = {
 response_greater_than_1 = {
     "detail": [
         {
-      "loc": [
+            "loc": ["path", "item_id"],
-        "path",
-        "item_id"
-      ],
             "msg": "ensure this value is greater than 1",
             "type": "value_error.number.not_gt",
-      "ctx": {
+            "ctx": {"limit_value": 1},
-        "limit_value": 1
-      }
         }
     ]
 }
 
 
-response_greater_than_equal_3 = {"detail":[{"loc":["path","item_id"],"msg":"ensure this value is greater than or equal to 3","type":"value_error.number.not_ge","ctx":{"limit_value":3}}]}
+response_greater_than_equal_3 = {
+    "detail": [
+        {
+            "loc": ["path", "item_id"],
+            "msg": "ensure this value is greater than or equal to 3",
+            "type": "value_error.number.not_ge",
+            "ctx": {"limit_value": 3},
+        }
+    ]
+}
 
 
 response_less_than_3 = {
     "detail": [
         {
-      "loc": [
+            "loc": ["path", "item_id"],
-        "path",
-        "item_id"
-      ],
             "msg": "ensure this value is less than 3",
             "type": "value_error.number.not_lt",
-      "ctx": {
+            "ctx": {"limit_value": 3},
-        "limit_value": 3
-      }
         }
     ]
 }
@@ -121,21 +137,25 @@ response_less_than_3 = {
 response_less_than_0 = {
     "detail": [
         {
-      "loc": [
+            "loc": ["path", "item_id"],
-        "path",
-        "item_id"
-      ],
             "msg": "ensure this value is less than 0",
             "type": "value_error.number.not_lt",
-      "ctx": {
+            "ctx": {"limit_value": 0},
-        "limit_value": 0
-      }
         }
     ]
 }
 
 
-response_less_than_equal_3 = {"detail":[{"loc":["path","item_id"],"msg":"ensure this value is less than or equal to 3","type":"value_error.number.not_le","ctx":{"limit_value":3}}]}
+response_less_than_equal_3 = {
+    "detail": [
+        {
+            "loc": ["path", "item_id"],
+            "msg": "ensure this value is less than or equal to 3",
+            "type": "value_error.number.not_le",
+            "ctx": {"limit_value": 3},
+        }
+    ]
+}
 
 
 @pytest.mark.parametrize(