Thanks Anthony !!
It worked.
On Sunday, April 26, 2015 at 8:33:55 PM UTC+5:30, Anthony wrote:
>
> Maybe try triggering the onchange event when dropdown2_a is changed. You
> could do that by changing the dropdown1 Ajax call from:
>
> ajax('{{=URL('default', 'getoptionsfordropdown2'})}}', [''], 'dropdown2')
>
> to:
>
> ajax('{{=URL('default', 'getoptionsfordropdown2'})}}', [''], ':eval')
>
> Then in the getoptionsfordropdown2 function, instead of just returning the
> select HTML, you can return Javascript code that changes the select HTML
> and then triggers the onchange event. This is not tested, by something
> along these lines:
>
> def getoptionsfordropdown2():
> html = [code to generate the select]
> return 'jQuery("#dropdown2").html("%s");
> jQuery("#dropdown2_a").change();' % html
>
> Anthony
>
> On Sunday, April 26, 2015 at 9:24:13 AM UTC-4, Sarbjit wrote:
>>
>> Hi,
>>
>> I have used AJAX based cascading drop down menu based on slice "
>> http://www.web2pyslices.com/slice/show/1526/cascading-drop-down-lists-with-ajax-2
>> "
>>
>> I have introduced a third drop down whose value is populated based on the
>> selection of second drop down.
>>
>> I am using the following code : (Not the exact code, but it'll be enough
>> to explain the flow)
>>
>> *VIEWS:*
>>
>> <select> <!-- DROPDOWN1-->
>> onchange="jQuery('#dropdown2_a').empty();
>> ajax('{{=URL('default','getoptionsfordropdown2'})}}', [''],
>> 'dropdown2');">
>> ..
>> </select>
>> <span id='dropdown2'>
>> <select id='dropdown2_a'> <!-- DROPDOWN2-->
>> onchange="jQuery('#dropdown3_a').empty();
>> ajax('{{=URL('default','getoptionsfordropdown3'})}}', [''],
>> 'dropdown3');">
>> </select>
>> </span>
>> <span id='dropdown3'>
>> <select id='dropdown3_a'> <!-- DROPDOWN3-->
>> </select>
>> </span>
>>
>> *CONTROLLER:*
>>
>> getoptionsfordropdown2/getoptionsfordropdown3:
>>
>> def ...
>> .... query the db and build SELECT ....
>> return SELECT(...)
>>
>>
>> *Problem:*
>>
>> So, at any point of time, if the option in the drop down1 is not changed,
>> then everything works fine i.e. changes in dropdown2 updates the options in
>> dropdown3.
>>
>> However, once the dropdown1 option is changed, dropdown3 contents are not
>> RESET (No code for it, and I need some guidance for it). So, I have to
>> change the option in dropdown2 and come-back in order to change the options
>> in dropdown3. Basically, once an option is changed in drop down1, user has
>> to change the option in dropdown2 once in order to update the dropdown3.
>>
>> Can someone please suggest me on how to handle this situation such that
>> changing the dropdown1 should update dropdown3 as well (based on the value
>> of dropdown2).
>>
>> Is it possible to call multiple forcefully trigger the onchange event for
>> dropdown2 once it is re-populated based on the changes in dropdown1.
>>
>>
>>
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