ruby - displaying updated_at gives error in rails -

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i´m trying display time when user updated post 

<%= current_user.hwaters(:updated_at).to_s  %>

user has_many :hwaters

and hwaters belongs_to :user

why not working?

if understood right want do, think try:

<%= current_user.hwaters.map(&:updated_at).join(', ') %>

by way, read more rails active record associations here understand how works.


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