ruby on rails - How can set a default value in select tag? -

i have table , want set default value

here table:

|customers|   |id|  |name|     1     abc     2     def     3     ghi     4     jkl 

here controller:

@customers.customer.all @customer_selected =   customer.find(:all,:conditions=>['id=1']) 

here view, showing customers

<%= select_tag "customer_id", options_for_select(@customers.collect {|t| [t.name,t.id]},params[:customer_id].to_i)  %>         

i tried line select customer_id=1 default value (selected)

<%= select_tag "customer_id", options_for_select(@customers.collect {|t| [t.name,t.id]},params[:customer_id].to_i),:selected =>@customer_selected.name  %>    

i'm getting error

undefined method `name' #<array:0x7f31d8098560>     

please can me ?

one thing bear in mind if params[:customer_id] isn't there, equal nil, , nil.to_i gives 0. should fine shouldn't have customer id 0 it's aware of.

i think should work:

<% default_id = params[:customer_id] ? params[:customer_id].to_i : (@customer_selected && @customer_selected.id) %> <%= select_tag "customer_id", options_for_select(@customers.collect {|t| [t.name,t.id]}, default_id)  %>         

this use params[:customer_id] if it's defined, or @customer_selected.id if @customer_selected defined.