Doing this will get the same results:
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  filtered_sub ###dict(filtered_sub = filtered_sub)

On Thursday, October 10, 2013 9:51:14 PM UTC+3, Avi A wrote:
>
> I have replaced echo.html with echo.load and now it only renders the table 
> without the layout.html.
>
> On Thursday, October 10, 2013 9:22:58 PM UTC+3, Avi A wrote:
>>
>>
>> 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)
>>
>>
>> echo.html
>>
>> <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}}'>test</option>
>>          {{pass}}
>> </select>
>>
>>
>> It injects into the target div a whole page (layout.html) and inside, it 
>> renders "ECHO" then  the filtered_sub results as a table, + design, 
>> reqwest, response, session, db tables and db stats buttons under it.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On Thursday, October 10, 2013 9:03:10 PM UTC+3, Avi A wrote:
>>>
>>> Exactly Starting now...
>>>
>>> On Thursday, October 10, 2013 8:02:40 PM UTC+3, Derek wrote:
>>>>
>>>> Any luck?
>>>>
>>>> On Tuesday, October 8, 2013 6:29:03 AM UTC-7, Avi A wrote:
>>>>>
>>>>> Still stuck with that...
>>>>> Thanks.
>>>>>
>>>>> On Saturday, October 5, 2013 5:29:37 PM UTC+3, Avi A wrote:
>>>>>>
>>>>>> 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)
>>>>>>     filtered_sub = dict(filtered_sub = filtered_sub)
>>>>>>     select_header = "<select id='t_items_f_item_subcategory' 
>>>>>> class='generic-widget' name='f_item_subcategory'> \
>>>>>>          <option value=''></option>"
>>>>>>     select_footer = '</select>'
>>>>>>     def select_body():
>>>>>>         for f in filtered_sub:
>>>>>>             #return "<option value='f.id'>" + f.f_item_subcategory + 
>>>>>> "</option>"
>>>>>>             return 'test'
>>>>>>     return select_footer + select_body() + select_footer
>>>>>>
>>>>>> This will render 'test' just once(where expected more).
>>>>>> I think the problem is that the filtered_sub = dict() from some 
>>>>>> reason.
>>>>>> If I replace the return 'test' with:
>>>>>> return "<option value='f.id'>" + f.f_item_subcategory + "</option>"
>>>>>> It flashes an error.
>>>>>> Thanks. 
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Saturday, October 5, 2013 10:32:43 AM UTC+3, Avi A wrote:
>>>>>>>
>>>>>>> Thanks. Yes, I will look carefully, but it looks like the html is in 
>>>>>>> the controller.
>>>>>>>
>>>>>>> On Saturday, October 5, 2013 2:31:10 AM UTC+3, Derek wrote:
>>>>>>>>
>>>>>>>> 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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