55 lines
1.6 KiB
Ruby
55 lines
1.6 KiB
Ruby
#
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# Copyright (C) 2012 Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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class CollectionItemUpvote < ActiveRecord::Base
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belongs_to :collection_item_data
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belongs_to :user
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attr_accessible :collection_item_data, :user
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validates_presence_of :collection_item_data, :user
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attr_readonly :collection_item_data_id, :user_id
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after_create :update_upvote_count
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after_destroy :update_upvote_count
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# upvotes get saved to the user's shard, and then increment the counter
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# stored on the collection_item_data, wherever it may live
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def user_with_sharding=(user)
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self.shard = user.shard
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self.user_without_sharding = user
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end
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alias_method_chain :user=, :sharding
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def update_upvote_count
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increment = 0
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if self.id_changed?
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# was a new record
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increment = 1
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elsif self.destroyed?
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increment = -1
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end
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if increment != 0
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collection_item_data.shard.activate do
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collection_item_data.class.update_all(['upvote_count = upvote_count + ?', increment], :id => collection_item_data.id)
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end
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end
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end
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end
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