React on select_tag (onchange)

Rails
1

Hi,

I’m new in developint rails (but I love rails).
I would like to react on changing a field in the view (no model field)
from a selection box to show the number of rows (which I used in the
controller).

In the controller I read the params-hash:
…
@rowsperpage = params[‘rowsperpage’].to_i
…

In the view I have the field, where I like to react directly.
…
<%= select_tag(“rowsperpage”, options_for_select( [[5, 5], [10,10],
[25,25], [50,50], [100,100],[200, 200],[500, 500],[1000, 1000]],
@rowsperpage ),
:onchange=>“alert(this.form.rowsperpage.options[this.form.rowsperpage.selectedIndex].value)”
) %>
…

The alert was only an example (I test it also with render, but without a
solution).
But I could change the values with no reaction.
What must I do, that the controller react direcly on my changes.

Thanks in advance.
Mike

2

mx wrote:

Hi,

I’m new in developint rails (but I love rails).
I would like to react on changing a field in the view (no model field)
from a selection box to show the number of rows (which I used in the
controller).

In the controller I read the params-hash:
…
@rowsperpage = params[‘rowsperpage’].to_i
…

In the view I have the field, where I like to react directly.
…
<%= select_tag(“rowsperpage”, options_for_select( [[5, 5], [10,10],
[25,25], [50,50], [100,100],[200, 200],[500, 500],[1000, 1000]],
@rowsperpage ),
:onchange=>“alert(this.form.rowsperpage.options[this.form.rowsperpage.selectedIndex].value)”
) %>
…

The alert was only an example (I test it also with render, but without a
solution).
But I could change the values with no reaction.
What must I do, that the controller react direcly on my changes.

Thanks in advance.
Mike

Try searching the web for keywords remote_function and select_tag

For example, this is close to what you want.

<%= select_tag( :sort_by, options_for_select([[“Sort
by:”,0],[“Name”,‘name’],[“Price”,‘price’], [“Date Listed”,‘id’]],0),
:onchange => remote_function( :with =>
“‘sort_by=’+$(“sort_by”).value”,
:loading => “false;”,
:url => { :controller => ‘products’, :action => :change_order } )
) %>

Stephan