collection_select not selecting default value

rubyonrails-talk
1

Hi,

I'm trying to create a dropdown using collection_select. However, I cant seem to get it to select the right option by default.

In my controller I have a setup like this:

@content = Content.new @content.selection_id = 3 @selections = Selection.find(:all)

In my view I have:

<% form_for :content, @content, :url => { :action => 'create' } do |f| %>     <%= f.collection_select :selection, @selections, :id, :name %>     <%= submit_tag 'Create' %> <% end %>

Despite me specifying the default value in the controller, collection_select doesnt seem to pick that up when rendering the html, which defaults to the first option in the dropdown.

What idiot-simple thing am I missing? :wink:

Thanks!

g.

2

Hi,

I'm trying to create a dropdown using collection_select. However, I cant seem to get it to select the right option by default.

In my controller I have a setup like this:

@content = Content.new @content.selection_id = 3 @selections = Selection.find(:all)

In my view I have:

<% form_for :content, @content, :url => { :action => 'create' } do |f| %>    <%= f.collection_select :selection, @selections, :id, :name %>    <%= submit_tag 'Create' %> <% end %>

The first thing that sticks out is it should be :selection_id instead of :selection.

Despite me specifying the default value in the controller, collection_select doesnt seem to pick that up when rendering the html, which defaults to the first option in the dropdown.

What idiot-simple thing am I missing? :wink:

And if that doesn't fix it, then my only other suggestion would be to make sure you have selection_id set as an integer in the database. I've accidentally created a foreign key as a string before, which works fine mostly, except when trying to do a select box and it's comparing integers to strings.

Hope that helps.

-- Brandon

3

The first thing that sticks out is it should be :selection_id instead of :selection.

that fixes it. thanks a million!