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Diffstat (limited to 'src/Language/GraphQL/Trans.hs')
| -rw-r--r-- | src/Language/GraphQL/Trans.hs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Language/GraphQL/Trans.hs b/src/Language/GraphQL/Trans.hs index 24752a2..09c012b 100644 --- a/src/Language/GraphQL/Trans.hs +++ b/src/Language/GraphQL/Trans.hs @@ -56,7 +56,7 @@ instance Monad m => MonadPlus (ActionT m) where -- | Retrieves an argument by its name. If the argument with this name couldn't -- be found, returns 'Value.Null' (i.e. the argument is assumed to -- be optional then). -argument :: MonadIO m => Name -> ActionT m Value +argument :: Monad m => Name -> ActionT m Value argument argumentName = do argumentValue <- ActionT $ lift $ asks $ lookup . arguments pure $ fromMaybe Null argumentValue |