ruby - Can not update ActiveRecord in rails console -
just experiement purpose, typed following commends rails console. queried arbitrary item , assign category_id , call "save". why, in result, nothing has changed (category_id of item still null)?
(some output has omitted clarity)
1.9.3-p327 :004 > = item.first item load (0.2ms) select "items".* "items" limit 1 1.9.3-p327 :005 > i.category_id =1 1.9.3-p327 :006 > i.save (0.1ms) begin transaction (0.1ms) commit transaction => true 1.9.3-p327 :007 > => #<item id: 1, title: "near", price: 1000.0, photos: nil, created_at: "2013-07-31 15:19:24", updated_at: "2013-07-31 15:51:46", user_id: nil, category_id: nil, location_id: 1> also tried update_attributes
1.9.3-p327 :008 > i.update_attributes(:category_id => 1) (0.1ms) begin transaction (0.1ms) commit transaction => true 1.9.3-p327 :009 > => #<item id: 1, title: "near", price: 1000.0, photos: nil, created_at: "2013-07-31 15:19:24", updated_at: "2013-07-31 15:51:46", user_id: nil, category_id: nil, location_id: 1> ------------------------------------------------edit ----------------------------
1.9.3-p327 :007 > i.price=50 => 50 1.9.3-p327 :008 > i.save (0.1ms) begin transaction (0.3ms) update "items" set "price" = 50.0, "updated_at" = '2013-07-31 21:28:33.643283' "items"."id" = 1 (229.6ms) commit transaction => true try attribute "price", works. say, rails prevent manually changes attributes end "_id", presumably protect foreign key?
can confirm this? or reproduce this?
------------------------------------edit again --------------------------------- model attached
class item < activerecord::base attr_accessible :photos, :price, :title, :user_id, :category_id attr_accessor :user_id, :category_id belongs_to :user belongs_to :category belongs_to :location end
didn't see last update. yes, if use
attr_accessor :user_id, :category_id you can't change values in console, tried it
attr_accessor ruby method makes getter , setter, attr_accessible rails method allows pass in values mass assignment: new(attrs) or update_attributes(attrs).
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