How to use Command Object on Controller (Grails 2.3.11) for update? -


for example, have controller 'addresstestcontroller', , has function update accepts command object.

addresstestcontroller {     def update(addressupdatecommand cmd){} }  class addressupdatecommand {     string firstname     string address }

when 'firstname' not in body request, it's null. when has value null, it's null. how check if user wants value null? thanks

afaik can't differ between empty , not submitted values in command.

the difference be, default values should applied if value not submitted.

class addressupdatecommand {     string firstname = "firstname not submitted"     string address }

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