Method: ActiveRecord::QueryMethods#or

Defined in:
lib/active_record/relation/query_methods.rb

#or(other) ⇒ Object

Returns a new relation, which is the logical union of this relation and the one passed as an argument.

The two relations must be structurally compatible: they must be scoping the same model, and they must differ only by #where (if no #group has been defined) or #having (if a #group is present). Neither relation may have a #limit, #offset, or #distinct set.

Post.where("id = 1").or(Post.where("author_id = 3"))
# SELECT `posts`.* FROM `posts` WHERE ((id = 1) OR (author_id = 3))



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# File 'lib/active_record/relation/query_methods.rb', line 643

def or(other)
  unless other.is_a? Relation
    raise ArgumentError, "You have passed #{other.class.name} object to #or. Pass an ActiveRecord::Relation object instead."
  end

  spawn.or!(other)
end