If you want to use a select_tag and include a blank option it can be achieved using the following snippet:
<%= select_tag “district”, options_for_select(Customer.all.collect { |k| ["#{k.district} #{k.store}", k.id] }.insert(0, ["", 0]), params[:number].to_i) %>
- it also handles setting the selected option if one is passed – in this case in the query string. I have been blogging about this previously but noticed that I had forgotten to show how to pass the chosen option if one exists.
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