Fix #1721.

TODO: write test...
2026-09-24 16:30:27 +08:00 · 2016-03-21 13:51:26 +00:00
parent 19bf334c77
commit 2efd9c2687
1 changed files with 1 additions and 1 deletions
@@ -210,7 +210,7 @@ class ToolParameter( object, Dictifiable ):
        return value

    def validate( self, value, history=None, workflow_building_mode=False ):
-        if value == "" and self.optional:
+        if value in ["", None] and self.optional:
            return
        for validator in self.validators:
            validator.validate( value, history )