Forum: Ruby on Rails Passing parameter from a dropdown.

Hello,

I have a dropdown in the UI. There are many oprions.
How do I send the parameter from the dropdown - the selected value to 
the
controller?

I have tried :-

1. <%= select_tag 'name', options_for_select(@list, :selected) %>
2. <%= select("audit", "value",options_for_select([["User Registration",
"USER_REGISTRATION"], ["Download", "USER_REPORT"]], :selected =>
params[:value]) %>

I am not getting any parameters passed to the controller.

On Thu, Dec 20, 2012 at 12:53 PM, Avi <aavinash.behera@gmail.com> wrote:

> "USER_REGISTRATION"], ["Download", "USER_REPORT"]], :selected =>
> params[:value]) %>
>
> I am not getting any parameters passed to the controller.
>

make sure that the select tag above is part of the form you are 
submitting
and that you
are actually submitting to the right action.  A quick look on your code
raised no issues.


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>
>
>



--

I am not adding any form because there is no model for this page.
Only there is controller and view.

On Thu, Dec 20, 2012 at 1:45 PM, Avi <aavinash.behera@gmail.com> wrote:

> I am not adding any form because there is no model for this page.
> Only there is controller and view.
>

you need to add a form to pass the selected values to the controller. 
It
doesn't
matter whether you're accessing a model or not.


>>> I have a dropdown in the UI. There are many oprions.
>>> I am not getting any parameters passed to the controller.
>>> --
>>> .
>  --
>
>



--

Sorry for late reply...

Can't we pass the param through ajax or js ?

On Fri, Dec 21, 2012 at 2:46 PM, Avi <aavinash.behera@gmail.com> wrote:

> Sorry for late reply...
>
> Can't we pass the param through ajax or js ?
>

yes you can. you have to read on ajax.


>>> Only there is controller and view.
>>>>
>>>>> I have tried :-
>>>> submitting and that you
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>



--

Somehow I did manage to pass the parameter from the dropdown to 
controller.
But the problem is here - I am getting it as string.

In Controller:----

class ReportController < ApplicationController

  REPORT1         = "type =?", "Box"
  REPORT2         = "action = ? and type =?", "create", "Square"


 def report
   param = params[:audit_report] // How to convert this string to an 
object
or static variable ? Or what is the best way to do it ?
   @report_data              =
(Audited::Adapters::ActiveRecord::Audit.where(param))
// If I am passing this param, it comes as a string not as static 
varaible
in this controller.
 end

end

In View :----

<script type="text/javascript">
        function audit_options(selected_audit){
 jQuery("#reports").load("/audit_report/report?audit_report=" +
selected_audit);
        }
</script>

<%= select_tag "reports_name", options_for_select([["User1", "REPORT1"],
["User2", "REPORT2"]]), :onchange =>"audit_options(this.value)" %>

<div id="reports">
 </div>


-------------------

Sent from my iPhone

On 21/12/2012, at 8:32 PM, Avi <aavinash.behera@gmail.com> wrote:

>
> <script type="text/javascript">
>         function audit_options(selected_audit){
>      jQuery("#reports").load("/audit_report/report?audit_report=" + 
selected_audit);
>         }
> </script>
>
> <%= select_tag "reports_name", options_for_select([["User1", "REPORT1"], 
["User2", "REPORT2"]]), :onchange =>"audit_options(this.value)" %>
>
> <div id="reports">
>
>   </div>

You should read on action controller basics. And also on debugging using 
pry or debugger so you can experiment on what you want to achieve. Good 
luck!