ruby on rails - Simple - getting record id instead of desired attribute -

this simple question new. trying create dropdown menu values populated model. however, instead of displaying city names, getting record id's like: 0x007fee0b7442c0 (not sure if these called id's, think there term).

controller:

@cities = city.find(:all, select: "name") 

view:

<%= f.select(:city, @cities) %> 

what doing wrong?

if want name attribute database do:

@cities = city.pluck(:name) # => ["sydney", "melbourne", "canberra"]