SQL alchemy Unique validator allows multiple None values

711b84be · Greg Kempe · 029cefeb · 711b84be
Commit 711b84be authored Mar 31, 2014 by Greg Kempe
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validators.py flask_admin/contrib/sqla/validators.py +4 -0

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--- a/flask_admin/contrib/sqla/validators.py
+++ b/flask_admin/contrib/sqla/validators.py
@@ -24,6 +24,10 @@ class Unique(object):
        self.message = message

    def __call__(self, form, field):
+        # databases allow multiple NULL values for unique columns
+        if field.data is None:
+            return
+
        try:
            obj = (self.db_session.query(self.model)
                   .filter(self.column == field.data)