Re: [OS-webwork] parameter passing through ww1 chained actions.

[Hani Suleiman]

Action chaining is NOT for a 'wizard' type user interface. An action 
chain is per request, it is not something that helps the user move 
along a set of pages. So unless I'm misunderstanding your problem, the 
behaviour you describe is correct. The chain 'ends' when you send a 
response to the user ,and any subsequent requests have no knowledge of 
what chains it has been through. So to do what you want, you would have 
to add in the parameters to your pages to inform the actions of what 
they should do.

On Dec 14, 2003, at 11:56 PM, Mittag, Simon wrote:

Hi,

 

I have problems passing attributes through chained ww1 actions. Let’s 
say I have an action chain a->b->c. Action class ‘a’ has an attribute 
“name” that gets passed on using accessors. When debugging this, it 
first looks fine. Action ‘b’ gets instantiated as SUCCESS event for 
‘a’ and b.setName() gets called, where the attribute gets passed over. 
I can see the results of that when halting in b.doValidation().

 

Next thing I do is an addError() in b.doValidation() because of 
additional parameters I want to enter through ‘b’ s input jsp page. 
When I return from that input jsp and enter b.doExecute(), b.name is 
empty as if there was a new ‘b’ instance. The value stack doesn’t seem 
to have the parameters as if it was empty. (I checked that there isn’t 
a same name parameter in ‘b’ so it doesn’t get overwritten with null 
or a new value, that’s not it).

 

Why does this value get wiped if actions are chained? I would like to 
chain actions to use previous actions attributes in follow up actions 
until the whole chain is handled. What am  I missing?

 

Regards,

 

Simon

 

P.S: Please note this is still ww1.

 


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