ruby on rails - Undefined method pluck for array? -
so have data stucture:
+[#<folder id: 1, name: "mollitia", parent_id: nil, user_id: 1, created_at: "2014-06-27 16:00:59", updated_at: "2014-06-27 16:00:59">, + #<folder id: 2, name: "porro", parent_id: 1, user_id: 1, created_at: "2014-06-27 16:00:59", updated_at: "2014-06-27 16:00:59">, + #<folder id: 3, name: "omnis", parent_id: 2, user_id: 1, created_at: "2014-06-27 16:00:59", updated_at: "2014-06-27 16:00:59">] which returned self.ancestors can pluck names?
def pwd self.ancestors.pluck(:name) end the above results in
undefined method `pluck' #<array:0x007ff4da780290> update
awesome print of structure:
[ [0] #<folder:0x007fd2946a5f18> { :id => 3, :name => "blanditiis", :parent_id => 2, :user_id => 1, :created_at => fri, 27 jun 2014 18:04:02 utc +00:00, :updated_at => fri, 27 jun 2014 18:04:02 utc +00:00 }, [1] #<folder:0x007fd2946ad1c8> { :id => 2, :name => "neque", :parent_id => 1, :user_id => 1, :created_at => fri, 27 jun 2014 18:04:02 utc +00:00, :updated_at => fri, 27 jun 2014 18:04:02 utc +00:00 }, [2] #<folder:0x007fd2946b80c8> { :id => 1, :name => "ut", :parent_id => nil, :user_id => 1, :created_at => fri, 27 jun 2014 18:04:02 utc +00:00, :updated_at => fri, 27 jun 2014 18:04:02 utc +00:00 } ]
pluck used rails change association query against database. change select * select [attr] [attr] argument pluck. since it's array, can't use it. should instead use regular old map ruby. in case, like:
def pwd self.ancestors.map(&:name) end
Comments
Post a Comment