How to display all values checked in a checkbox using Rails?

Question

<form action="/decide_start_session" method="get">
    <input type="checkbox" name = "subject" value = "NetPresentValue" checked> Net Present Value
    <input type="checkbox" name = "subject" value = "FamaFrench" checked> Fama French
    <%= submit_tag("Start session", class: "btn btn-success") %>
</form>


puts params[:subject]

I have the first part in my view and the second line in my controller in my Rails app. If a user selects both checkboxes, the Rails console only returns the last item checked instead of all of them together. Any idea on how I can fix this (show all the checkboxes in the console)?

San · Accepted Answer · 2014-06-25 23:04:23Z

2

If you change the name attribute of checkboxes to subject[] and remove spaces around = in your html, then checked values will be passed to the controller as array.

<form action="/decide_start_session" method="get">
    <input type="checkbox" name="subject[]" value="NetPresentValue" checked> Net Present Value
    <input type="checkbox" name="subject[]" value="FamaFrench" checked> Fama French   
</form>

Then you can do this in your controller:

puts params[:subject].inspect

answered Jun 25, 2014 at 23:04

San

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infused · Accepted Answer · 2014-06-25 23:03:42Z

0

Use name="subject[]" and then you will get an array of selected values in params[:subject]

answered Jun 25, 2014 at 23:03

infused

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