test: doctest for addNullEmbedFilters

src/PostgREST/ApiRequest/QueryParams.hs

@@ -60,12 +60,6 @@ import PostgREST.ApiRequest.Types (EmbedParam (..), EmbedPath, Field,
 
 import Protolude hiding (try)
 
-
--- $setup
--- Setup for doctests
--- >>> import Text.Pretty.Simple (pPrint)
--- >>> deriving instance Show QPError
-
 data QueryParams =
   QueryParams
     { qsCanonical      :: ByteString

src/PostgREST/ApiRequest/Types.hs

@@ -86,12 +86,15 @@ data ApiRequestError
   | UnacceptableSchema [Text]
   | UnsupportedMethod ByteString
   | ColumnNotFound Text Text
+  deriving Show
 
 data QPError = QPError Text Text
+  deriving Show
 data RangeError
   = NegativeLimit
   | LowerGTUpper
   | OutOfBounds Text Text
+  deriving Show
 
 type NodeName = Text
 type Depth = Integer