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Biju
Biju

Reputation: 988

How to return multiple parameters using select_tag in ruby on rails

<% select_tag(:report_id, options_for_select(
  [["Detail1", 1], ["Detail2", 2], ["Detail3", 3], ["Detail4", 4], ["Detail5", 5], ["Detail6", 6], ["Detail7", 7]]))%>
<% submit_tag("Generate Report") %>

I have the above select menu. This would return report_id parameter based on the value selected by the user. Now, I need another parameter named format to be set as :xlsx if report_id is 1 or 2 and format should be set to :pdf if report_id > 2. How can I achieve this? Please help!

I tried something like this but this does not work:

<% select_tag(:report_id, options_for_select(
  [["Detail1", 1], ["Detail2", 2], ["Detail3", 3], ["Detail4", 4], ["Detail5", 5], ["Detail6", 6], ["Detail7", 7]]))%>


<% if report_id < 3 %>
  <%= hidden_field_tag :format, :xlsx %>
<% elsif report_id >=3 %>
  <%= hidden_field_tag :format, :pdf %>
<% end %>


<% submit_tag("Generate Report") %>

I get this error with the above code:

format parameter error

Please help!

Upvotes: 0

Views: 1071

Answers (2)

Talha Junaid
Talha Junaid

Reputation: 944

You can't access value of report_id untill unless you submit it to server. You can use JS/jquery to update format parameter value whenever the select_tag value changes

<% select_tag(:report_id, options_for_select(
  [["Detail1", 1], ["Detail2", 2], ["Detail3", 3], ["Detail4", 4], ["Detail5", 5], ["Detail6", 6], ["Detail7", 7]]), id: "report_id")%>
<%= hidden_field_tag :format, :xlsx, id: "format_param" %>
<% submit_tag("Generate Report") %>

JS to assign format params value whenever select_tag value changes

$("#report_id").change(function(){
  var report_val = $("#report_id").val();
  if(report_val < 3)
    $('#format_param').val("xlsx")
  else
     $('#format_param').val("pdf")
})

Upvotes: 1

kishore cheruku
kishore cheruku

Reputation: 521

Here you can do two things.

  • You can write if condition in your controller once the action is trigger

    if params[:report_id] >= 3 format = 'pdf' else format = 'xlsx' end

  • OR if you want send from form itself then you need to write jquery onchange event

    <% select_tag(:report_id, options_for_select( [["Detail1", 1], ["Detail2", 2], ["Detail3", 3], ["Detail4", 4], ["Detail5", 5], ["Detail6", 6], ["Detail7", 7]])) id: "something"%>

  • Jquery

    $('#something').on('change', function() { if(this.value >= 3) { $('#hidden_value').val('pdf') } else { $('#hidden_value').val('xlsx'); } })

  • hidden field <% hidden_field_tag :format , id: "hidden_value" %>

Upvotes: 1

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