Validate required input fields

src/Language/GraphQL/Execute/Transform.hs

@@ -153,7 +153,7 @@ coerceVariableValues types operationDefinition variableValues =
     forEach variableDefinition coercedValues = do
         let Full.VariableDefinition variableName variableTypeName defaultValue _ =
                 variableDefinition
-        let defaultValue' = constValue . Full.value <$> defaultValue
+        let defaultValue' = constValue . Full.node <$> defaultValue
         variableType <- lookupInputType variableTypeName types
 
         Coerce.matchFieldValues
@@ -178,7 +178,8 @@ constValue (Full.ConstList l) = Type.List $ constValue <$> l
 constValue (Full.ConstObject o) =
     Type.Object $ HashMap.fromList $ constObjectField <$> o
   where
-    constObjectField (Full.ObjectField key value' _) = (key, constValue value')
+    constObjectField Full.ObjectField{value = value', ..} =
+        (name, constValue $ Full.node value')
 
 -- | Rewrites the original syntax tree into an intermediate representation used
 -- for query execution.
@@ -384,7 +385,8 @@ value (Full.List list) = Type.List <$> traverse value list
 value (Full.Object object) =
     Type.Object . HashMap.fromList <$> traverse objectField object
   where
-    objectField (Full.ObjectField name value' _) = (name,) <$> value value'
+    objectField Full.ObjectField{value = value', ..} =
+        (name,) <$> value (Full.node value')
 
 input :: forall m. Full.Value -> State (Replacement m) (Maybe Input)
 input (Full.Variable name) =
@@ -400,8 +402,8 @@ input (Full.Object object) = do
     objectFields <- foldM objectField HashMap.empty object
     pure $ pure $ Object objectFields
   where
-    objectField resultMap (Full.ObjectField name value' _) =
-        inputField resultMap name value'
+    objectField resultMap Full.ObjectField{value = value', ..} =
+        inputField resultMap name $ Full.node value'
 
 inputField :: forall m
     . HashMap Full.Name Input