firstly,thank you for your help! you give the instance that can not explan the the use of the variable_handler! you kown, in practice, we should authorize at each node!and the structure of table have been understood by me in general! but i save a workflow using ezcWorkflowDatabaseDefinitionStorage and execute a instance of the workflow by ezcWorkflowDatabaseExecution! why is the field execution_variablesof the table execution null and what is the use of the execution_variables?
在2009-03-11，"Sebastian Bergmann" <s...@ez.no> 写道： >chenlong85.2004 schrieb: >> I do not know the use of the variable_handler > > A variable handler is an object of a class that implements the > ezcWorkflowVariableHandler interface. > > Using its save() and load() methods, such a variable handler can > be used to store and fetch a workflow variable outside of the > workflow component's own data storage. > > A user id, for instance, may be read from the embedding application's > authentication system and be injected into the workflow using a > variable handler. > >-- >Sebastian Bergmann >System Developer >s...@ez.no | eZ Systems | http://ez.no >
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