I have three Select components and a TextField component on my form
(customerSelect, locationSelect, deviceSelect, problemTextField). What
is supposed to happen is when the user selects a customer the
locationSelect component should be filled with the locations associated
with the selected customer. I attempted this using the onEvent mixin
and a javascript function, but Tapestry kept telling me my javascript
function was undefined.
I decided to simplify and eliminate the OnEvent mixin and use onchange
instead. The problem is onchange doesn't seem to allow Tapestry to
persist any of the form fields.
Now I am using a combination of both OnEvent and onchange. Using this
approach the customerSelect component persists I think because of the
OnEvent mixin, but the other components reset every time a new customer
is selected.
Here is the customerSelect definition from my tml file.
<select t:type="select" t:id="customerSelect"
t:model="selectModelCustomers" t:encoder="selectModelCustomers"
t:value="selectedCustomer" t:mixins="commons/OnEvent" event="change"
onchange="document.forms[0].submit()">
I am hoping someone can point me in the right direction if there is a
more conventional way of updating a form based on a user's actions.
Otherwise maybe help me find the reason my current approach isn't
working. I can include more code if that will help to better understand
what I am requesting.
The only other thing is if I initialize the customerSelect in onActivate
the select is always one selection behind (ie. I choose a customer and
when the page refreshes the select component is not updated, I then
choose a different customer and the select is updated with my first
selection... ) -- probably because of my use of onchange. So instead I
am initializing it in the java page's constructor and that fixed the
delay problem. If anyone has any insight regarding this I would love to
hear it.
I would love for this to work with AJAX using the OnEvent mixin and an
onCompleteCallback javascript event, but it doesn't have to. Submitting
the entire form to update the necessary components is acceptable for
this project.
Thank you,
Jayson Pierringer
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