add protection in the type.

modules/plugin_dbui/filters.py

@@ -11,7 +11,17 @@ def CLEAN_COMMA(value):
     """Remove trailing comma(s).
     Search patterns are: ',' or ', ' or ' ,, ' ...
     
+    @type value: str or unicode
+    @param value:
+    
+    @rtype: str or unicode 
+
+    @note: return the value unchanged when it is not a string.
+    
     """
+    if not isinstance(value, (str, unicode)):
+        return value
+    
     return re.sub(REG_COMMA, '', value)
 
 
@@ -23,6 +33,11 @@ def CLEAN_SPACES(value):
     @param value:
     
     @rtype: str or unicode
+
+    @note: return the value unchanged when it is not a string.
     
     """
+    if not isinstance(value, (str, unicode)):
+        return value
+
     return ' '.join(value.strip().split())
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