I'm getting this error due to a change necessary for my form.
Initially - I was using formhelper where the form_for looked like this: <%= form_tag :action => 'create_position' %>
Now I've switched to the scaffold_resource in edge rails where the forms are setup as such: <% form_for(:position, :url => positions_path) do |f| %>
So I know that this form_for will also accept the regular formhelpers. However Im running into a problem with a field, where if i don't add the f (i.e. f.select) the page loads fine but the input is never put into the database. If I put the f on it generates the undefined method merge error. Here is the field:
<%= f.select 'pay', 'id', Pay.find(:all).collect {|p| [p.name, p.id]}%>
Hoping someone can help. TIA Stuart