Multiple select listboxes in Rails
Since I think the documentation is lacking and I always have to rely on Stackoverflow every time I want to use it, I keep this a remind-me-note:
<%= f.select :user,
options_from_collection_for_select(
User.all, # The object list
"id", # get this attribute as key
"email", # SHow this in listbox
@store.store_admins.ids
),
{}, #html attributes, empty here
{
:size => 5,
:multiple=>true
} # "select" options
%>
Now we can all wonder why this simple example isnt in the documentation…….