1 files changed, 39 insertions, 0 deletions
diff --git a/vendor/github.com/vektah/gqlparser/validator/rules/fragments_on_composite_types.go b/vendor/github.com/vektah/gqlparser/validator/rules/fragments_on_composite_types.go
new file mode 100644
index 00000000..a4a48246
--- /dev/null
+++ b/vendor/github.com/vektah/gqlparser/validator/rules/fragments_on_composite_types.go
@@ -0,0 +1,39 @@
+package validator
+
+import (
+	"fmt"
+
+	"github.com/vektah/gqlparser/ast"
+	. "github.com/vektah/gqlparser/validator"
+)
+
+func init() {
+	AddRule("FragmentsOnCompositeTypes", func(observers *Events, addError AddErrFunc) {
+		observers.OnInlineFragment(func(walker *Walker, inlineFragment *ast.InlineFragment) {
+			fragmentType := walker.Schema.Types[inlineFragment.TypeCondition]
+			if fragmentType == nil || fragmentType.IsCompositeType() {
+				return
+			}
+
+			message := fmt.Sprintf(`Fragment cannot condition on non composite type "%s".`, inlineFragment.TypeCondition)
+
+			addError(
+				Message(message),
+				At(inlineFragment.Position),
+			)
+		})
+
+		observers.OnFragment(func(walker *Walker, fragment *ast.FragmentDefinition) {
+			if fragment.Definition == nil || fragment.TypeCondition == "" || fragment.Definition.IsCompositeType() {
+				return
+			}
+
+			message := fmt.Sprintf(`Fragment "%s" cannot condition on non composite type "%s".`, fragment.Name, fragment.TypeCondition)
+
+			addError(
+				Message(message),
+				At(fragment.Position),
+			)
+		})
+	})
+}