Take the 2-minute tour ×  This is probably pretty simple, but
here:  Say I've got two models, Thing and Tag  class Thing <
ActiveRecord::Base     has_and_belongs_to_many :tags  class Tag
< ActiveRecord::Base     has_and_belongs_to_many :things  And I
have an instance of each. I want to link them. Can I do
something like:  @thing = Thing.find(1) @tag = Tag.find(1)   If
not, what is the best way to do this? Thanks!  share|improve
this question add comment  1 Answer  up vote 1 down vote
accepted  I think the best way is to use find_or_create.  tag =
@thing.tags.find_or_create_by_name('tagname') share|improve this
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