My problem is that I have, for example, Product, Category and ProductCategory. ProductCategory makes possible for a Product have several Categories
I would like to implement this using Select2 (http://ivaynberg.github.io/select2/) using the select2-rails gem (https://github.com/argerim/select2-rails)
I already know how to relate the models but I can't figure out how to implement the Select2 specific code.
EDIT: Now I see that my problem was not much about select2, so I added this comment and changed the title hoping that it can help somebody else
Now I see that my problems were not about select2 but to do a multi select.
The code in the _form.html.erb that make it work is this one:
<%= f.label :category_id %>
<%= f.collection_select :category_ids, Category.order(:name), :id, :name, {:selected => @product.category_ids, :include_blank => true}, {:class => 'col-xs-12 col-md-7 padding_15', :multiple => true} %>
I also included :category_ids in the attr_accessible on models/product.rb
And the select2 specific, I included in a .js file
$(document).ready(function() {
$('#product_category_ids').select2();
});
I'm including these links as they helped me but pay attention on the differences depending on the Ruby/Rails versions
Just to let you know, unexpectedly, if this collection_select is the last line in my form, some form fields are disabled although there is nothing that states this in the source. Changing the order this problem doesn't exist.
I also don't know why the look is a little different than the other fields (I'm using Bootstrap 3)
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