32 lines
1.4 KiB
Ruby
32 lines
1.4 KiB
Ruby
class Favorite < ActiveRecord::Base
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belongs_to :post
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scope :for_user, lambda {|user_id| where("user_id % 100 = #{user_id.to_i % 100} and user_id = #{user_id.to_i}")}
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# this is necessary because there's no trigger for deleting favorites
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def self.destroy_all(hash)
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connection.execute("delete from favorites_#{hash[:user_id] % 100} where user_id = #{hash[:user_id]} and post_id = #{hash[:post_id]}")
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end
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def self.add(post, user)
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return if Favorite.for_user(user.id).exists?(:user_id => user.id, :post_id => post.id)
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Favorite.create(:user_id => user.id, :post_id => post.id)
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Post.update_all("fav_count = fav_count + 1", "id = #{post.id}")
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Post.update_all("score = score + 1", "id = #{post.id}") if user.is_privileged?
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post.append_user_to_fav_string(user.id)
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user.add_favorite!(post)
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user.increment!(:favorite_count)
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post.add_favorite!(user)
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end
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def self.remove(post, user)
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return unless Favorite.for_user(user.id).exists?(:user_id => user.id, :post_id => post.id)
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Favorite.destroy_all(:user_id => user.id, :post_id => post.id)
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Post.update_all("fav_count = fav_count - 1", "id = #{post.id}")
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Post.update_all("score = score - 1", "id = #{post.id}") if user.is_privileged?
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post.delete_user_from_fav_string(user.id)
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user.remove_favorite!(post)
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user.decrement!(:favorite_count)
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post.remove_favorite!(user)
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end
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end
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