can we use collection_select with :selected option if yes ,plz let me know.if not than plz tell me how to use select instead of collection_select and where to write query in select if i dont want to find all records.
thnx in advance.
You need to give more information. What do you want to be selected and when?
If you want a default value put
t.column :favourite_colour_id, :integer, :default => 1
in your migration.
If you are loading an existing record (for editing) the correct value should already be selected in the select box.
If you are still stuck please paste your controller and view code.