How to get params from checkbox in rails3 controllers

Question

Here is my codes:

<%=form_tag('/user_group_follows/follow',:id=>'follow_select_form',:remote=>true,:method=>:get) do %>
    <p>You want to add this user to?</p>
    <%=hidden_field_tag 'user_id',@user.id%>
    <%@user.user_groups.each do |ug|%>
        <%=check_box_tag 'user_group_id',ug.id,false,{:id=>'user_group_id_'+ug.id.to_s}%><%=ug.name%><br/>
    <%end%>
<%end%>
//using jquery-ui, so there is no submit button....

I wanna the user to make a multiple choice to decide which groups that he/she would like to add into the following list.

So I made several checkboxes with the same name as 'user_group_id' and different ids. I could successfully get the params throught params[:user_group_id], if the user only checked one box. But if he truly checked several of them, how to get this value set in controller? In this circumstance, params[:user_group_id] could only get one of them. And I quite believe codes like: params[:user_group_id_+XXX.id] is not going to work....

jefflunt · Accepted Answer · 2012-03-14 14:08:22Z

5

If you name them with id's like user_group_id['+ug.id+'], I think you should get params like params[:user_group_id] which should contain an array of all the id's of groups that were checked.

Something like this, not sure exactly, but basically you want to name your fields such that they are grouped into an array naturally, by virtue of how they are named:

<%=check_box_tag 'user_group_id['+ug.id']',ug.id,false,{:id=>'user_group_id_'+ug.id.to_s}%><%=ug.name%>

So, params[:user_group_id].first would contain the id of the first checkbox that was selected.

answered Mar 14, 2012 at 14:08

jefflunt

34k7 gold badges91 silver badges127 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Yitong Zhou Over a year ago

em...I think it is not working, params[:user_group_id].first only returns 1, but actually the expected user_group_id should be 28 and 29...

Yitong Zhou Over a year ago

Well, I have got it, the codes should be: <%=check_box_tag 'user_group_id[]'%> so that the Rails will recognize params[:user_group_id]as an array! Thanks anyway, your answer really did a great hint!

yozzz · Accepted Answer · 2014-10-08 10:48:40Z

0

if you go in this way <%=check_box_tag 'user_group_id[]'%> it's returning array of selected ids,

<%=check_box_tag 'user_group_id',ug.id, params[:user_group_id].try(:include?,ug.id.to_s),{:id=>'user_group_id_'+ug.id.to_s}%>

edited Oct 8, 2014 at 10:48

answered Oct 8, 2014 at 10:13

yozzz

1,2871 gold badge22 silver badges31 bronze badges

Collectives™ on Stack Overflow

How to get params from checkbox in rails3 controllers

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related