how to pre-select a collection_select inside a form_for?

rubyonrails-talk
1

I have a form_for like:

<%= form_for @user, … |f| %>

<%= f.collection_select :friend_type, FriendType.all, :id, :name %>

Now in my new action, I set the friend_type from the querystring, so it already has a value of e.g. 3 (which is the id).

How can I have this pre-selected when it renders?

2

Set the html_options parameter in collection_select to { :selected => params[:friend_type] }

3

http://apidock.com/rails/ActionView/Helpers/FormOptionsHelper/collection_select

might help you on this. It seems to depend on what exact objects you've got set up. I'm not too clear on it myself!

-Dave

4

I'm curious what you have as far as relationships in your FriendType model? Does it belong_to :user?

If so,

<%= f.collection_select(:user_id, FriendType.all, :id, :name, options= {:prompt => false}, {:class => 'yourCustomClass'}) %>

Hope that helps you out.

5

thanks I’ll try that tonight.

6

Ok I added:

page.html

And my select is actually empty, it has no options! But when running rails server I can see the select and options (and the dropdown list in the browser).

Why is it not rendering using capybara?

My controller for new is:

@account = Account.new

My view page has:

<% form_for … %>

<%= f.label :plan_type%>

<%= f.collection_select :friend_type, FriendType.all, :id, :name, { :selected => params[:friend_type] } %>

<%end%>

My test looks like:

describe “User pages” do

subject { page }

describe “new” do

before { visit ‘/user/new’ }

describe “with valid information” do

before do

select ‘XXXX’, :from => “user[friend_type]”

fill_in …

…

end

it “should create a user” do

expect { click_button “Create”}.to change(User, :count).by(1)

end

end

end

end

Is this a timing issue?

7

ok figured it out, I had to run seed on my test db.

thanks!