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authorEugen Wissner <belka@caraus.de>2019-12-01 20:43:19 +0100
committerEugen Wissner <belka@caraus.de>2019-12-02 07:43:19 +0100
commitfc9ad9c4a1e2e79a6b93d2599ca8fa6770caf631 (patch)
tree344aa5eeddaf2429c8919e42fdd48ef4840adefc /src/Language/GraphQL/Schema.hs
parentdef52ddc202dc43f75ce5aebee3e448b263bde12 (diff)
downloadgraphql-fc9ad9c4a1e2e79a6b93d2599ca8fa6770caf631.tar.gz
Consider __typename when evaluating fragments
Fixes #30.
Diffstat (limited to 'src/Language/GraphQL/Schema.hs')
-rw-r--r--src/Language/GraphQL/Schema.hs4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/Language/GraphQL/Schema.hs b/src/Language/GraphQL/Schema.hs
index afe068f..fa8bf78 100644
--- a/src/Language/GraphQL/Schema.hs
+++ b/src/Language/GraphQL/Schema.hs
@@ -131,8 +131,8 @@ resolve resolvers = fmap (Aeson.toJSON . fold) . traverse tryResolvers
tryResolvers (SelectionField fld@(Field _ name _ _))
= maybe (errmsg fld) (tryResolver fld) $ find (compareResolvers name) resolvers
tryResolvers (SelectionFragment (Fragment typeCondition selections')) = do
- that <- maybe (return "") resolveTypeName (find (compareResolvers "__typename") resolvers)
- if Aeson.String typeCondition == that
+ that <- traverse resolveTypeName (find (compareResolvers "__typename") resolvers)
+ if maybe True (Aeson.String typeCondition ==) that
then fmap fold . traverse tryResolvers $ selections'
else return mempty
compareResolvers name (Resolver name' _) = name == name'