Use index vs existence of parseLiteral fn to check if field is a leaf

Author: schwma

lib/resolvers/parse/ast/literal.js

@@ -12,8 +12,8 @@ const _getTypeFrom_fields = (_fields, path, index = 0) => {
   const _field = _fields[name]
   const type = _getTypeFrom_fieldOr_arg(_field)
 
-  // If type has the parseLiteral function it is a scalar type -> leaf -> end of path
-  if (type.parseLiteral) return type
+  // If we are at the end of the path, it is a leaf -> scalar type with parseLiteral function
+  if (index === path.length) return type
 
   const next = path[index]
   // Is the next path element an argument? If yes, follow the argument