This question gets asked frequently here, there should be a FAQ somewhere 
and this should be in it...

Is this what you want?
http://www.web2pyslices.com/slice/show/1467/cascading-drop-down-lists-with-ajax

On Friday, October 4, 2013 2:04:41 PM UTC-7, Avi A wrote:
>
> I was exactly pasting it actually :).
>
> def echo():
>     value = request.post_vars.f_item_category
>     filtered_sub=db(db.t_sub_categories.f_category_id == 
> value).select(db.t_sub_categories.ALL,orderby=db.t_sub_categories.f_sub_category_name,
>  
> cache=(cache.ram,10),cacheable=True)
>
>    return dict(filtered_sub=filtered_sub)
>
>
>
>  <select id="t_items_f_item_subcategory" class="generic-widget" 
> name="f_item_subcategory">
>             <option value=""></option>
>             {{for f in filtered_sub:}}
>             <option value="{{f.id}}">{{=f.f_item_subcategory}}</option>
>             {{pass}}
>         </select>
>
>
>
>
>
>
>
>
>
>
> On Friday, October 4, 2013 11:26:24 PM UTC+3, Avi A wrote:
>>
>> One more question please,
>> so now I have to build the filtered (with the value) sub categories 
>> select object's html in the controller and return into the target div?
>> On Friday, October 4, 2013 11:08:30 PM UTC+3, Avi A wrote:
>>>
>>> That works...Awesome thanks. 
>>>
>>> On Friday, October 4, 2013 10:14:37 PM UTC+3, Niphlod wrote:
>>>>
>>>> you where trying the exact same thing on the onselect, and I left it 
>>>> there as it was.
>>>> If you want to send the value of the selected item as a post variable, 
>>>> use 
>>>>
>>>> ajax('echo', '#t_items_f_item_category', 'target')
>>>>
>>>> you'll get request.post_vars.f_item_category filled in the echo 
>>>> function.
>>>>
>>>> On Friday, October 4, 2013 9:52:42 AM UTC+2, Avi A wrote:
>>>>>
>>>>> This test returns none:
>>>>> def echo():
>>>>>     return request.vars.value if request.vars else 'None'
>>>>>
>>>>> On Thursday, October 3, 2013 8:18:15 PM UTC+3, Avi A wrote:
>>>>>>
>>>>>>
>>>>>> Hi,
>>>>>> I'm trying to use the ajax function on a list , with no success so 
>>>>>> far.
>>>>>>
>>>>>> def echo():
>>>>>>     return request.vars.value
>>>>>>
>>>>>> <select class="generic-widget" id="t_items_f_item_category" 
>>>>>> name="f_item_category">
>>>>>>     <option value=""></option>
>>>>>>     {{for c in category:}}
>>>>>>     <option value='{{=c.id}}' onselect="ajax('echo', 
>>>>>> ['{{=c.id}}'],'target')" 
>>>>>> >{{=c.f_category_name}}</option>
>>>>>>     {{pass}}
>>>>>> </select>
>>>>>>
>>>>>> <div id='target'></div>
>>>>>>
>>>>>> Thanks.
>>>>>>
>>>>>
> On Friday, October 4, 2013 11:59:54 PM UTC+3, Niphlod wrote:
>>
>> are you asking to me to read your mind ? :D
>>
>> On Friday, October 4, 2013 10:26:24 PM UTC+2, Avi A wrote:
>>>
>>> One more question please,
>>> so now I have to build the filtered (with the value) sub categories 
>>> select object's html in the controller and return into the target div?
>>> On Friday, October 4, 2013 11:08:30 PM UTC+3, Avi A wrote:
>>>>
>>>> That works...Awesome thanks. 
>>>>
>>>> On Friday, October 4, 2013 10:14:37 PM UTC+3, Niphlod wrote:
>>>>>
>>>>> you where trying the exact same thing on the onselect, and I left it 
>>>>> there as it was.
>>>>> If you want to send the value of the selected item as a post variable, 
>>>>> use 
>>>>>
>>>>> ajax('echo', '#t_items_f_item_category', 'target')
>>>>>
>>>>> you'll get request.post_vars.f_item_category filled in the echo 
>>>>> function.
>>>>>
>>>>> On Friday, October 4, 2013 9:52:42 AM UTC+2, Avi A wrote:
>>>>>>
>>>>>> This test returns none:
>>>>>> def echo():
>>>>>>     return request.vars.value if request.vars else 'None'
>>>>>>
>>>>>> On Thursday, October 3, 2013 8:18:15 PM UTC+3, Avi A wrote:
>>>>>>>
>>>>>>>
>>>>>>> Hi,
>>>>>>> I'm trying to use the ajax function on a list , with no success so 
>>>>>>> far.
>>>>>>>
>>>>>>> def echo():
>>>>>>>     return request.vars.value
>>>>>>>
>>>>>>> <select class="generic-widget" id="t_items_f_item_category" 
>>>>>>> name="f_item_category">
>>>>>>>     <option value=""></option>
>>>>>>>     {{for c in category:}}
>>>>>>>     <option value='{{=c.id}}' onselect="ajax('echo', 
>>>>>>> ['{{=c.id}}'],'target')" 
>>>>>>> >{{=c.f_category_name}}</option>
>>>>>>>     {{pass}}
>>>>>>> </select>
>>>>>>>
>>>>>>> <div id='target'></div>
>>>>>>>
>>>>>>> Thanks.
>>>>>>>
>>>>>>

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