Add a release task

inside an input object for the role checking for unused and undefined
variables.

.gitea/workflows/build.yml

@@ -0,0 +1,52 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches: [master]
+
+jobs:
+  audit:
+    runs-on: haskell
+    steps:
+      - name: Set up environment
+        run: |
+          apt-get update -y
+          apt-get upgrade -y
+          apt-get install -y nodejs pkg-config
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+          cabal update
+          cabal install hlint "--constraint=hlint ==3.8"
+      - run: cabal exec hlint -- src tests
+
+  test:
+    runs-on: haskell
+    steps:
+      - name: Set up environment
+        run: |
+          apt-get update -y
+          apt-get upgrade -y
+          apt-get install -y nodejs pkg-config
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: cabal update
+      - name: Prepare system
+        run: cabal build graphql-test
+      - run: cabal test --test-show-details=streaming
+
+  doc:
+    runs-on: haskell
+    steps:
+      - name: Set up environment
+        run: |
+          apt-get update -y
+          apt-get upgrade -y
+          apt-get install -y nodejs pkg-config
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: cabal update
+      - run: cabal haddock --enable-documentation

.gitea/workflows/release.yml

@@ -0,0 +1,23 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - '**'
+
+jobs:
+  release:
+    runs-on: haskell
+    steps:
+      - name: Set up environment
+        run: |
+          apt-get update -y
+          apt-get upgrade -y
+          apt-get install -y nodejs pkg-config
+      - uses: actions/checkout@v4
+      - name: Upload a candidate
+        env:
+          HACKAGE_PASSWORD: ${{ secrets.HACKAGE_PASSWORD }}
+        run: |
+          cabal sdist
+          cabal upload --username belka --password ${HACKAGE_PASSWORD}

CHANGELOG.md

@@ -6,6 +6,26 @@ The format is based on
 and this project adheres to
 [Haskell Package Versioning Policy](https://pvp.haskell.org/).
 
+## [1.3.0.0] - 2024-05-01
+### Changed
+- Remove deprecated `runCollectErrs`, `Resolution`, `CollectErrsT` from the
+  `Error` module.
+
+## [1.2.0.3] - 2024-01-09
+### Fixed
+- Fix corrupted source distribution.
+
+## [1.2.0.2] - 2024-01-09
+### Fixed
+- `gql` removes not only leading `\n` but also `\r`.
+- Fix non nullable type string representation in executor error messages.
+- Fix input objects not being coerced to lists.
+- Fix used variables are not found in the properties of input objects.
+
+## [1.2.0.1] - 2023-04-25
+### Fixed
+- Support hspec 2.11.
+
 ## [1.2.0.0] - 2023-02-28
 ### Added
 - Schema printing.
@@ -400,7 +420,6 @@ and this project adheres to
 - `Language.GraphQL.Schema`: `enum`, `enumA`, `wrappedEnum` and `wrappedEnumA`.
   Use `scalar`, `scalarA`, `wrappedScalar` and `wrappedScalarA` instead.
 
-
 ## [0.5.1.0] - 2019-10-22
 ### Deprecated
 - `Language.GraphQL.AST.Arguments`. Use `[Language.GraphQL.AST.Argument]`
@@ -505,24 +524,28 @@ and this project adheres to
 ### Added
 - Data types for the GraphQL language.
 
-[1.2.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v1.2.0.0&rev_to=v1.1.0.0
-[1.1.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v1.1.0.0&rev_to=v1.0.3.0
-[1.0.3.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v1.0.3.0&rev_to=v1.0.2.0
-[1.0.2.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v1.0.2.0&rev_to=v1.0.1.0
-[1.0.1.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v1.0.1.0&rev_to=v1.0.0.0
-[1.0.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v1.0.0.0&rev_to=v0.11.1.0
-[0.11.1.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.11.1.0&rev_to=v0.11.0.0
-[0.11.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.11.0.0&rev_to=v0.10.0.0
-[0.10.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.10.0.0&rev_to=v0.9.0.0
-[0.9.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.9.0.0&rev_to=v0.8.0.0
-[0.8.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.8.0.0&rev_to=v0.7.0.0
-[0.7.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.7.0.0&rev_to=v0.6.1.0
-[0.6.1.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.6.1.0&rev_to=v0.6.0.0
-[0.6.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.6.0.0&rev_to=v0.5.1.0
-[0.5.1.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.5.1.0&rev_to=v0.5.0.1
-[0.5.0.1]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.5.0.1&rev_to=v0.5.0.0
-[0.5.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.5.0.0&rev_to=v0.4.0.0
-[0.4.0.0]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.4.0.0&rev_to=v0.3
-[0.3]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.3&rev_to=v0.2.1
-[0.2.1]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.2.1&rev_to=v0.2
-[0.2]: https://www.caraus.tech/projects/pub-graphql/repository/23/diff?rev=v0.2&rev_to=v0.1
+[1.3.0.0]: https://git.caraus.tech/OSS/graphql/compare/v1.2.0.3...v1.3.0.0
+[1.2.0.3]: https://git.caraus.tech/OSS/graphql/compare/v1.2.0.2...v1.2.0.3
+[1.2.0.2]: https://git.caraus.tech/OSS/graphql/compare/v1.2.0.1...v1.2.0.2
+[1.2.0.1]: https://git.caraus.tech/OSS/graphql/compare/v1.2.0.0...v1.2.0.1
+[1.2.0.0]: https://git.caraus.tech/OSS/graphql/compare/v1.1.0.0...v1.2.0.0
+[1.1.0.0]: https://git.caraus.tech/OSS/graphql/compare/v1.0.3.0...v1.1.0.0
+[1.0.3.0]: https://git.caraus.tech/OSS/graphql/compare/v1.0.2.0...v1.0.3.0
+[1.0.2.0]: https://git.caraus.tech/OSS/graphql/compare/v1.0.1.0...v1.0.2.0
+[1.0.1.0]: https://git.caraus.tech/OSS/graphql/compare/v1.0.0.0...v1.0.1.0
+[1.0.0.0]: https://git.caraus.tech/OSS/graphql/compare/v0.11.1.0...v1.0.0.0
+[0.11.1.0]: https://git.caraus.tech/OSS/graphql/compare/v0.11.0.0...v0.11.1.0
+[0.11.0.0]: https://git.caraus.tech/OSS/graphql/compare/v0.10.0.0...v0.11.0.0
+[0.10.0.0]: https://git.caraus.tech/OSS/graphql/compare/v0.9.0.0...v0.10.0.0
+[0.9.0.0]: https://git.caraus.tech/OSS/graphql/compare/v0.8.0.0...v0.9.0.0
+[0.8.0.0]: https://git.caraus.tech/OSS/graphql/compare/v0.7.0.0...v0.8.0.0
+[0.7.0.0]: https://git.caraus.tech/OSS/graphql/compare/v0.6.1.0...v0.7.0.0
+[0.6.1.0]: https://git.caraus.tech/OSS/graphql/compare/v0.6.0.0...v0.6.1.0
+[0.6.0.0]: https://git.caraus.tech/OSS/graphql/compare/v0.5.1.0...v0.6.0.0
+[0.5.1.0]: https://git.caraus.tech/OSS/graphql/compare/v0.5.0.1...v0.5.1.0
+[0.5.0.1]: https://git.caraus.tech/OSS/graphql/compare/v0.5.0.0...v0.5.0.1
+[0.5.0.0]: https://git.caraus.tech/OSS/graphql/compare/v0.4.0.0...v0.5.0.0
+[0.4.0.0]: https://git.caraus.tech/OSS/graphql/compare/v0.3...v0.4.0.0
+[0.3]: https://git.caraus.tech/OSS/graphql/compare/v0.2.1...v0.3
+[0.2.1]: https://git.caraus.tech/OSS/graphql/compare/v0.2...v0.2.1
+[0.2]: https://git.caraus.tech/OSS/graphql/compare/v0.1...v0.2

README.md

@@ -1,15 +1,12 @@
 # GraphQL implementation in Haskell
 
-[![Simple Haskell](https://www.simplehaskell.org/badges/badge.svg)](https://www.simplehaskell.org)
-[![CI/CD](https://img.shields.io/badge/CI-CD-brightgreen)](https://build.caraus.tech/go/pipelines)
-
-See https://www.caraus.tech/projects/pub-graphql.
+See https://git.caraus.tech/OSS/graphql.
 
 Report issues on the
-[bug tracker](https://www.caraus.tech/projects/pub-graphql/issues).
+[bug tracker](https://git.caraus.tech/OSS/graphql/issues).
 
 API documentation is available through
 [Hackage](https://hackage.haskell.org/package/graphql).
 
 Further documentation will be made available in the
-[Wiki](https://www.caraus.tech/projects/pub-graphql/wiki).
+[Wiki](https://git.caraus.tech/OSS/graphql/wiki).

graphql.cabal

@@ -1,17 +1,17 @@
 cabal-version: 2.4
 
 name:           graphql
-version:        1.2.0.0
+version:        1.3.0.0
 synopsis:       Haskell GraphQL implementation
 description:    Haskell <https://spec.graphql.org/June2018/ GraphQL> implementation.
 category:       Language
-homepage:       https://www.caraus.tech/projects/pub-graphql
-bug-reports:    https://www.caraus.tech/projects/pub-graphql/issues
+homepage:       https://git.caraus.tech/OSS/graphql
+bug-reports:    https://git.caraus.tech/OSS/graphql/issues
 author:         Danny Navarro <j@dannynavarro.net>,
                 Matthías Páll Gissurarson <mpg@mpg.is>,
                 Sólrún Halla Einarsdóttir <she@mpg.is>
 maintainer:     belka@caraus.de
-copyright:      (c) 2019-2023 Eugen Wissner,
+copyright:      (c) 2019-2024 Eugen Wissner,
                 (c) 2015-2017 J. Daniel Navarro
 license:        MPL-2.0 AND BSD-3-Clause
 license-files:  LICENSE,
@@ -21,11 +21,12 @@ extra-source-files:
   CHANGELOG.md
   README.md
 tested-with:
-  GHC == 9.2.5
+  GHC == 9.4.7,
+  GHC == 9.6.3
 
 source-repository head
   type: git
-  location: git://caraus.tech/pub/graphql.git
+  location: https://git.caraus.tech/OSS/graphql.git
 
 library
   exposed-modules:
@@ -59,7 +60,7 @@ library
   build-depends:
     base >= 4.7 && < 5,
     conduit ^>= 1.3.4,
-    containers ^>= 0.6.2,
+    containers >= 0.6 && < 0.8,
     exceptions ^>= 0.10.4,
     megaparsec >= 9.0 && < 10,
     parser-combinators >= 1.3 && < 2,
@@ -92,12 +93,12 @@ test-suite graphql-test
   ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
 
   build-depends:
-    QuickCheck ^>= 2.14.1,
+    QuickCheck >= 2.14 && < 2.16,
     base,
     conduit,
     exceptions,
     graphql,
-    hspec ^>= 2.10.9,
+    hspec >= 2.10.9 && < 2.12,
     hspec-expectations ^>= 0.8.2,
     hspec-megaparsec ^>= 2.2.0,
     megaparsec,
@@ -105,4 +106,6 @@ test-suite graphql-test
     unordered-containers,
     containers,
     vector
+  build-tool-depends:
+    hspec-discover:hspec-discover
   default-language: Haskell2010

src/Language/GraphQL/AST/Document.hs

@@ -371,8 +371,8 @@ data NonNullType
     deriving Eq
 
 instance Show NonNullType where
-    show (NonNullTypeNamed typeName) = '!' : Text.unpack typeName
-    show (NonNullTypeList listType) =  concat ["![", show listType, "]"]
+    show (NonNullTypeNamed typeName) = Text.unpack $ typeName <> "!"
+    show (NonNullTypeList listType) = concat ["[", show listType, "]!"]
 
 -- ** Directives
 

src/Language/GraphQL/Error.hs

@@ -8,28 +8,22 @@
 
 -- | Error handling.
 module Language.GraphQL.Error
-    ( CollectErrsT
-    , Error(..)
+    ( Error(..)
     , Path(..)
-    , Resolution(..)
     , ResolverException(..)
     , Response(..)
     , ResponseEventStream
     , parseError
-    , runCollectErrs
     ) where
 
 import Conduit
 import Control.Exception (Exception(..))
-import Control.Monad.Trans.State (StateT, runStateT)
-import Data.HashMap.Strict (HashMap)
 import Data.Sequence (Seq(..), (|>))
 import qualified Data.Sequence as Seq
 import Data.Text (Text)
 import qualified Data.Text as Text
-import Language.GraphQL.AST (Location(..), Name)
+import Language.GraphQL.AST (Location(..))
 import Language.GraphQL.Execute.Coerce
-import qualified Language.GraphQL.Type.Schema as Schema
 import Prelude hiding (null)
 import Text.Megaparsec
     ( ParseErrorBundle(..)
@@ -97,28 +91,3 @@ instance Show ResolverException where
     show (ResolverException e) = show e
 
 instance Exception ResolverException
-
--- * Deprecated
-
-{-# DEPRECATED runCollectErrs "runCollectErrs was part of the old executor and isn't used anymore" #-}
--- | Runs the given query computation, but collects the errors into an error
--- list, which is then sent back with the data.
-runCollectErrs :: (Monad m, Serialize a)
-    => HashMap Name (Schema.Type m)
-    -> CollectErrsT m a
-    -> m (Response a)
-runCollectErrs types' res = do
-    (dat, Resolution{..}) <- runStateT res
-        $ Resolution{ errors = Seq.empty, types = types' }
-    pure $ Response dat errors
-
-{-# DEPRECATED Resolution "Resolution was part of the old executor and isn't used anymore" #-}
--- | Executor context.
-data Resolution m = Resolution
-    { errors :: Seq Error
-    , types :: HashMap Name (Schema.Type m)
-    }
-
-{-# DEPRECATED CollectErrsT "CollectErrsT was part of the old executor and isn't used anymore" #-}
--- | A wrapper to pass error messages around.
-type CollectErrsT m = StateT (Resolution m) m

src/Language/GraphQL/Execute.hs

@@ -556,33 +556,24 @@ coerceArgumentValues argumentDefinitions argumentValues =
                     $ Just inputValue
                 | otherwise -> throwM
                     $ InputCoercionException (Text.unpack argumentName) variableType Nothing
+
     matchFieldValues' = matchFieldValues coerceArgumentValue
         $ Full.node <$> argumentValues
-    coerceArgumentValue inputType (Transform.Int integer) =
-        coerceInputLiteral inputType (Type.Int integer)
-    coerceArgumentValue inputType (Transform.Boolean boolean) =
-        coerceInputLiteral inputType (Type.Boolean boolean)
-    coerceArgumentValue inputType (Transform.String string) =
-        coerceInputLiteral inputType (Type.String string)
-    coerceArgumentValue inputType (Transform.Float float) =
-        coerceInputLiteral inputType (Type.Float float)
-    coerceArgumentValue inputType (Transform.Enum enum) =
-        coerceInputLiteral inputType (Type.Enum enum)
-    coerceArgumentValue inputType Transform.Null
-        | In.isNonNullType inputType = Nothing
-        | otherwise = coerceInputLiteral inputType Type.Null
-    coerceArgumentValue (In.ListBaseType inputType) (Transform.List list) =
-        let coerceItem = coerceArgumentValue inputType
-         in Type.List <$> traverse coerceItem list
-    coerceArgumentValue (In.InputObjectBaseType inputType) (Transform.Object object)
-        | In.InputObjectType _ _ inputFields <- inputType = 
-            let go = forEachField object
-                resultMap = HashMap.foldrWithKey go (pure mempty) inputFields
-             in Type.Object <$> resultMap
-    coerceArgumentValue _ (Transform.Variable variable) = pure variable
-    coerceArgumentValue _ _ = Nothing
-    forEachField object variableName (In.InputField _ variableType defaultValue) =
-        matchFieldValues coerceArgumentValue object variableName variableType defaultValue
+
+    coerceArgumentValue inputType transform =
+      coerceInputLiteral inputType $ extractArgumentValue transform
+
+    extractArgumentValue (Transform.Int integer) = Type.Int integer
+    extractArgumentValue (Transform.Boolean boolean) = Type.Boolean boolean
+    extractArgumentValue (Transform.String string) = Type.String string
+    extractArgumentValue (Transform.Float float) = Type.Float float
+    extractArgumentValue (Transform.Enum enum) = Type.Enum enum
+    extractArgumentValue Transform.Null = Type.Null
+    extractArgumentValue (Transform.List list) =
+      Type.List $ extractArgumentValue <$> list
+    extractArgumentValue (Transform.Object object) =
+      Type.Object $ extractArgumentValue <$> object
+    extractArgumentValue (Transform.Variable variable) = variable
 
 collectFields :: Monad m
     => Out.ObjectType m

src/Language/GraphQL/TH.hs

@@ -21,7 +21,7 @@ stripIndentation code = reverse
     indent count (' ' : xs) = indent (count - 1) xs
     indent _ xs = xs
     withoutLeadingNewlines = dropNewlines code
-    dropNewlines = dropWhile (== '\n')
+    dropNewlines = dropWhile $ flip any ['\n', '\r'] . (==)
     spaces = length $ takeWhile (== ' ') withoutLeadingNewlines
 
 -- | Removes leading and trailing newlines. Indentation of the first line is

src/Language/GraphQL/Type/Definition.hs

@@ -18,6 +18,8 @@ module Language.GraphQL.Type.Definition
     , float
     , id
     , int
+    , showNonNullType
+    , showNonNullListType
     , selection
     , string
     ) where
@@ -207,3 +209,11 @@ include = handle include'
             (Just (Boolean True)) -> Include directive'
             _ -> Skip
     include' directive' = Continue directive'
+
+showNonNullType :: Show a => a -> String
+showNonNullType = (++ "!") . show
+
+showNonNullListType :: Show a => a -> String
+showNonNullListType listType =
+    let representation = show listType
+     in concat ["[", representation, "]!"]

src/Language/GraphQL/Type/In.hs

@@ -66,10 +66,11 @@ instance Show Type where
     show (NamedEnumType enumType) = show enumType
     show (NamedInputObjectType inputObjectType) = show inputObjectType
     show (ListType baseType) = concat ["[", show baseType, "]"]
-    show (NonNullScalarType scalarType) = '!' : show scalarType
-    show (NonNullEnumType enumType) = '!' : show enumType
-    show (NonNullInputObjectType inputObjectType) = '!' : show inputObjectType
-    show (NonNullListType baseType) = concat ["![", show baseType, "]"]
+    show (NonNullScalarType scalarType) = Definition.showNonNullType scalarType
+    show (NonNullEnumType enumType) = Definition.showNonNullType enumType
+    show (NonNullInputObjectType inputObjectType) =
+        Definition.showNonNullType inputObjectType
+    show (NonNullListType baseType) = Definition.showNonNullListType baseType
 
 -- | Field argument definition.
 data Argument = Argument (Maybe Text) Type (Maybe Definition.Value)

src/Language/GraphQL/Type/Out.hs

@@ -115,12 +115,12 @@ instance forall a. Show (Type a) where
     show (NamedInterfaceType interfaceType) = show interfaceType
     show (NamedUnionType unionType) = show unionType
     show (ListType baseType) = concat ["[", show baseType, "]"]
-    show (NonNullScalarType scalarType) = '!' : show scalarType
-    show (NonNullEnumType enumType) = '!' : show enumType
-    show (NonNullObjectType inputObjectType) = '!' : show inputObjectType
-    show (NonNullInterfaceType interfaceType) = '!' : show interfaceType
-    show (NonNullUnionType unionType) = '!' : show unionType
-    show (NonNullListType baseType) = concat ["![", show baseType, "]"]
+    show (NonNullScalarType scalarType) = showNonNullType scalarType
+    show (NonNullEnumType enumType) = showNonNullType enumType
+    show (NonNullObjectType inputObjectType) = showNonNullType inputObjectType
+    show (NonNullInterfaceType interfaceType) = showNonNullType interfaceType
+    show (NonNullUnionType unionType) = showNonNullType unionType
+    show (NonNullListType baseType) = showNonNullListType baseType
 
 -- | Matches either 'NamedScalarType' or 'NonNullScalarType'.
 pattern ScalarBaseType :: forall m. ScalarType -> Type m

src/Language/GraphQL/Validate/Rules.hs

@@ -2,11 +2,13 @@
    v. 2.0. If a copy of the MPL was not distributed with this file, You can
    obtain one at https://mozilla.org/MPL/2.0/. -}
 
+{-# LANGUAGE DataKinds #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TypeApplications #-}
 {-# LANGUAGE ViewPatterns #-}
 
 -- | This module contains default rules defined in the GraphQL specification.
@@ -61,6 +63,7 @@ import Data.Sequence (Seq(..), (|>))
 import qualified Data.Sequence as Seq
 import Data.Text (Text)
 import qualified Data.Text as Text
+import GHC.Records (HasField(..))
 import qualified Language.GraphQL.AST.Document as Full
 import qualified Language.GraphQL.Type.Definition as Definition
 import qualified Language.GraphQL.Type.Internal as Type
@@ -618,6 +621,10 @@ noUndefinedVariablesRule =
         , "\"."
         ]
 
+-- Used to find the difference between defined and used variables. The first
+-- argument are variables defined in the operation, the second argument are
+-- variables used in the query. It should return the difference between these
+-- 2 sets.
 type UsageDifference
     = HashMap Full.Name [Full.Location]
     -> HashMap Full.Name [Full.Location]
@@ -664,11 +671,17 @@ variableUsageDifference difference errorMessage = OperationDefinitionRule $ \cas
         = filterSelections' selections
         >>= lift . mapReaderT (<> mapDirectives directives') . pure
     findDirectiveVariables (Full.Directive _ arguments _) = mapArguments arguments
-    mapArguments = Seq.fromList . mapMaybe findArgumentVariables
+    mapArguments = Seq.fromList . (>>= findArgumentVariables)
     mapDirectives = foldMap findDirectiveVariables
-    findArgumentVariables (Full.Argument _ Full.Node{ node = Full.Variable value', ..} _) =
-        Just (value', [location])
-    findArgumentVariables _ = Nothing
+
+    findArgumentVariables (Full.Argument _ value _) = findNodeVariables value
+    findNodeVariables Full.Node{ node = value, ..} = findValueVariables location value
+
+    findValueVariables location (Full.Variable value') = [(value', [location])]
+    findValueVariables _ (Full.List values) = values >>= findNodeVariables
+    findValueVariables _ (Full.Object fields) = fields
+        >>= findNodeVariables . getField @"value"
+    findValueVariables _ _ = []
     makeError operationName (variableName, locations') = Error
         { message = errorMessage operationName variableName
         , locations = locations'

tests/Language/GraphQL/AST/Arbitrary.hs

@@ -7,6 +7,7 @@ import Test.QuickCheck.Arbitrary (Arbitrary (arbitrary))
 import Test.QuickCheck (oneof, elements, listOf, resize, NonEmptyList (..))
 import Test.QuickCheck.Gen (Gen (..))
 import Data.Text (Text, pack)
+import Data.Functor ((<&>))
 
 newtype AnyPrintableChar = AnyPrintableChar { getAnyPrintableChar :: Char } deriving (Eq, Show)
 
@@ -59,34 +60,36 @@ instance Arbitrary a => Arbitrary (AnyObjectField a) where
         location' <- getAnyLocation <$> arbitrary
         pure $ AnyObjectField $ Doc.ObjectField name' value' location'
 
-newtype AnyValue = AnyValue { getAnyValue :: Doc.Value } deriving (Eq, Show)
+newtype AnyValue = AnyValue { getAnyValue :: Doc.Value }
+    deriving (Eq, Show)
 
-instance Arbitrary AnyValue where
-    arbitrary = AnyValue <$> oneof
-        [ variableGen
-        , Doc.Int <$> arbitrary
-        , Doc.Float <$> arbitrary
-        , Doc.String <$> (getAnyPrintableText <$> arbitrary)
-        , Doc.Boolean <$> arbitrary
-        , MkGen $ \_ _ -> Doc.Null
-        , Doc.Enum <$> (getAnyName <$> arbitrary)
-        , Doc.List <$> listGen
-        , Doc.Object <$> objectGen
-        ]
-            where
-                variableGen :: Gen Doc.Value
-                variableGen = Doc.Variable <$> (getAnyName <$> arbitrary)
-                listGen :: Gen [Doc.Node Doc.Value]
-                listGen = (resize 5 . listOf) nodeGen
-                nodeGen = do
-                    node' <- getAnyNode <$> (arbitrary :: Gen (AnyNode AnyValue))
-                    pure (getAnyValue <$> node')
-                objectGen :: Gen [Doc.ObjectField Doc.Value]
-                objectGen = resize 1 $ do
-                    list <- getNonEmpty <$> (arbitrary :: Gen (NonEmptyList (AnyObjectField AnyValue)))
-                    pure $ map (fmap getAnyValue . getAnyObjectField) list
+instance Arbitrary AnyValue
+  where
+    arbitrary =
+        let variableGen :: Gen Doc.Value
+            variableGen = Doc.Variable . getAnyName <$> arbitrary
+            listGen :: Gen [Doc.Node Doc.Value]
+            listGen = (resize 5 . listOf) nodeGen
+            nodeGen :: Gen (Doc.Node Doc.Value)
+            nodeGen = fmap getAnyNode arbitrary <&> fmap getAnyValue
+            objectGen :: Gen [Doc.ObjectField Doc.Value]
+            objectGen = resize 1
+                $ fmap getNonEmpty arbitrary
+                <&> map (fmap getAnyValue . getAnyObjectField)
+         in AnyValue <$> oneof
+            [ variableGen
+            , Doc.Int <$> arbitrary
+            , Doc.Float <$> arbitrary
+            , Doc.String . getAnyPrintableText <$> arbitrary
+            , Doc.Boolean <$> arbitrary
+            , MkGen $ \_ _ -> Doc.Null
+            , Doc.Enum . getAnyName <$> arbitrary
+            , Doc.List <$> listGen
+            , Doc.Object <$> objectGen
+            ]
 
-newtype AnyArgument a = AnyArgument { getAnyArgument :: Doc.Argument } deriving (Eq, Show)
+newtype AnyArgument a = AnyArgument { getAnyArgument :: Doc.Argument }
+    deriving (Eq, Show)
 
 instance Arbitrary a => Arbitrary (AnyArgument a) where
     arbitrary = do

tests/Language/GraphQL/ExecuteSpec.hs

@@ -69,6 +69,7 @@ queryType = Out.ObjectType "Query" Nothing []
     , ("throwing", ValueResolver throwingField throwingResolver)
     , ("count", ValueResolver countField countResolver)
     , ("sequence", ValueResolver sequenceField sequenceResolver)
+    , ("withInputObject", ValueResolver withInputObjectField withInputObjectResolver)
     ]
   where
     philosopherField =
@@ -89,6 +90,17 @@ queryType = Out.ObjectType "Query" Nothing []
         let fieldType = Out.ListType $ Out.NonNullScalarType int
          in Out.Field Nothing fieldType HashMap.empty
     sequenceResolver = pure intSequence
+    withInputObjectResolver = pure $ Type.Int 0
+    withInputObjectField =
+        Out.Field Nothing (Out.NonNullScalarType int) $ HashMap.fromList
+            [("values", In.Argument Nothing withInputObjectArgumentType Nothing)]
+    withInputObjectArgumentType = In.NonNullListType
+        $ In.NonNullInputObjectType inputObjectType
+
+inputObjectType :: In.InputObjectType
+inputObjectType = In.InputObjectType "InputObject" Nothing $
+    HashMap.singleton "name" $
+        In.InputField Nothing (In.NonNullScalarType int) Nothing
 
 intSequence :: Value
 intSequence = Type.List [Type.Int 1, Type.Int 2, Type.Int 3]
@@ -295,7 +307,7 @@ spec =
                 let data'' = Object $ HashMap.singleton "philosopher" Null
                     executionErrors = pure $ Error
                         { message =
-                            "Value completion error. Expected type !School, found: EXISTENTIALISM."
+                            "Value completion error. Expected type School!, found: EXISTENTIALISM."
                         , locations = [Location 1 17]
                         , path = [Segment "philosopher", Segment "school"]
                         }
@@ -307,7 +319,7 @@ spec =
                 let data'' = Object $ HashMap.singleton "philosopher" Null
                     executionErrors = pure $ Error
                         { message =
-                            "Value completion error. Expected type !Interest, found: { instrument: \"piano\" }."
+                            "Value completion error. Expected type Interest!, found: { instrument: \"piano\" }."
                         , locations = [Location 1 17]
                         , path = [Segment "philosopher", Segment "interest"]
                         }
@@ -319,7 +331,7 @@ spec =
                 let data'' = Object $ HashMap.singleton "philosopher" Null
                     executionErrors = pure $ Error
                         { message
-                            = "Value completion error. Expected type !Work, found:\
+                            = "Value completion error. Expected type Work!, found:\
                             \ { title: \"Also sprach Zarathustra: Ein Buch f\252r Alle und Keinen\" }."
                         , locations = [Location 1 17]
                         , path = [Segment "philosopher", Segment "majorWork"]
@@ -328,22 +340,10 @@ spec =
                     sourceQuery = "{ philosopher { majorWork { title } } }"
                  in sourceQuery `shouldResolveTo` expected
 
-            it "gives location information for invalid scalar arguments" $
-                let data'' = Object $ HashMap.singleton "philosopher" Null
-                    executionErrors = pure $ Error
-                        { message =
-                            "Argument \"id\" has invalid type. Expected type ID, found: True."
-                        , locations = [Location 1 15]
-                        , path = [Segment "philosopher"]
-                        }
-                    expected = Response data'' executionErrors
-                    sourceQuery = "{ philosopher(id: true) { lastName } }"
-                 in sourceQuery `shouldResolveTo` expected
-
             it "gives location information for failed result coercion" $
                 let data'' = Object $ HashMap.singleton "philosopher" Null
                     executionErrors = pure $ Error
-                        { message = "Unable to coerce result to !Int."
+                        { message = "Unable to coerce result to Int!."
                         , locations = [Location 1 26]
                         , path = [Segment "philosopher", Segment "century"]
                         }
@@ -364,7 +364,7 @@ spec =
 
             it "sets data to null if a root field isn't nullable" $
                 let executionErrors = pure $ Error
-                        { message = "Unable to coerce result to !Int."
+                        { message = "Unable to coerce result to Int!."
                         , locations = [Location 1 3]
                         , path = [Segment "count"]
                         }
@@ -375,7 +375,7 @@ spec =
             it "detects nullability errors" $
                 let data'' = Object $ HashMap.singleton "philosopher" Null
                     executionErrors = pure $ Error
-                        { message = "Value completion error. Expected type !String, found: null."
+                        { message = "Value completion error. Expected type String!, found: null."
                         , locations = [Location 1 26]
                         , path = [Segment "philosopher", Segment "firstLanguage"]
                         }
@@ -389,6 +389,25 @@ spec =
                     sourceQuery = "{ sequence }"
                 in sourceQuery `shouldResolveTo` expected
 
+            context "Arguments" $ do
+                it "gives location information for invalid scalar arguments" $
+                    let data'' = Object $ HashMap.singleton "philosopher" Null
+                        executionErrors = pure $ Error
+                            { message =
+                                "Argument \"id\" has invalid type. Expected type ID, found: True."
+                            , locations = [Location 1 15]
+                            , path = [Segment "philosopher"]
+                            }
+                        expected = Response data'' executionErrors
+                        sourceQuery = "{ philosopher(id: true) { lastName } }"
+                    in sourceQuery `shouldResolveTo` expected
+
+                it "puts an object in a list if needed" $
+                    let data'' = Object $ HashMap.singleton "withInputObject" $ Type.Int 0
+                        expected = Response data'' mempty
+                        sourceQuery = "{ withInputObject(values: { name: 0 }) }"
+                    in sourceQuery `shouldResolveTo` expected
+
             context "queryError" $ do
                 let namedQuery name = "query " <> name <> " { philosopher(id: \"1\") { interest } }"
                     twoQueries = namedQuery "A" <> " " <> namedQuery "B"

tests/Language/GraphQL/Validate/RulesSpec.hs

@@ -29,6 +29,7 @@ queryType = ObjectType "Query" Nothing [] $ HashMap.fromList
     [ ("dog", dogResolver)
     , ("cat", catResolver)
     , ("findDog", findDogResolver)
+    , ("findCats", findCatsResolver)
     ]
   where
     dogField = Field Nothing (Out.NamedObjectType dogType) mempty
@@ -39,6 +40,11 @@ queryType = ObjectType "Query" Nothing [] $ HashMap.fromList
     findDogResolver = ValueResolver findDogField $ pure Null
     catField = Field Nothing (Out.NamedObjectType catType) mempty
     catResolver = ValueResolver catField $ pure Null
+    findCatsArguments = HashMap.singleton "commands"
+        $ In.Argument Nothing (In.NonNullListType $ In.NonNullEnumType catCommandType)
+        $ Just $ List []
+    findCatsField = Field Nothing (Out.NonNullListType $ Out.NonNullObjectType catType) findCatsArguments
+    findCatsResolver = ValueResolver findCatsField $ pure $ List []
 
 catCommandType :: EnumType
 catCommandType = EnumType "CatCommand" Nothing $ HashMap.fromList
@@ -538,7 +544,7 @@ spec =
                         }
                  in validate queryString `shouldContain` [expected]
 
-        context "noUndefinedVariablesRule" $
+        context "noUndefinedVariablesRule" $ do
             it "rejects undefined variables" $
                 let queryString = [gql|
                   query variableIsNotDefinedUsedInSingleFragment {
@@ -560,7 +566,35 @@ spec =
                         }
                  in validate queryString `shouldBe` [expected]
 
-        context "noUnusedVariablesRule" $
+            it "gets variable location inside an input object" $
+                let queryString = [gql|
+                  query {
+                    findDog (complex: { name: $name }) {
+                      name
+                    }
+                  }
+                |]
+                    expected = Error
+                        { message = "Variable \"$name\" is not defined."
+                        , locations = [AST.Location 2 29]
+                        }
+                 in validate queryString `shouldBe` [expected]
+
+            it "gets variable location inside an array" $
+                let queryString = [gql|
+                  query {
+                    findCats (commands: [JUMP, $command]) {
+                      name
+                    }
+                  }
+                |]
+                    expected = Error
+                        { message = "Variable \"$command\" is not defined."
+                        , locations = [AST.Location 2 30]
+                        }
+                 in validate queryString `shouldBe` [expected]
+
+        context "noUnusedVariablesRule" $ do
             it "rejects unused variables" $
                 let queryString = [gql|
                   query variableUnused($atOtherHomes: Boolean) {
@@ -577,6 +611,16 @@ spec =
                         }
                  in validate queryString `shouldBe` [expected]
 
+            it "detects variables in properties of input objects" $
+                let queryString = [gql|
+                  query withVar ($name: String!) {
+                    findDog (complex: { name: $name }) {
+                      name
+                    }
+                  }
+                |]
+                 in validate queryString `shouldBe` []
+
         context "uniqueInputFieldNamesRule" $
             it "rejects duplicate fields in input objects" $
                 let queryString = [gql|
@@ -878,7 +922,7 @@ spec =
                         { message =
                             "Variable \"$dogCommandArg\" of type \
                             \\"DogCommand\" used in position expecting type \
-                            \\"!DogCommand\"."
+                            \\"DogCommand!\"."
                         , locations = [AST.Location 1 26]
                         }
                  in validate queryString `shouldBe` [expected]
@@ -925,7 +969,7 @@ spec =
                 |]
                     expected = Error
                         { message =
-                            "Value 3 cannot be coerced to type \"!CatCommand\"."
+                            "Value 3 cannot be coerced to type \"CatCommand!\"."
                         , locations = [AST.Location 3 36]
                         }
                  in validate queryString `shouldBe` [expected]
@@ -940,7 +984,7 @@ spec =
                 |]
                     expected = Error
                         { message =
-                            "Value 3 cannot be coerced to type \"!String\"."
+                            "Value 3 cannot be coerced to type \"String!\"."
                         , locations = [AST.Location 2 28]
                         }
                  in validate queryString `shouldBe` [expected]