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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'>How do I specify an attribute as optional without having to specify a default value? <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>For example, how do I specify “delay” attribute is optional in the request without having to specify a default value of “5”? <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Is this because I also have a “validate” constraint?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Snippet from loadbalancer.py in quantum/extensions.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>'delay': {'allow_post': True, 'allow_put': True,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'> 'default': '5',<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'> 'validate': {'type:range': [1, 120]},<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'> 'convert_to': attr.convert_to_int,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'> 'is_visible': True}<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Pattabi<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>