66 lines
1.9 KiB
Ruby
66 lines
1.9 KiB
Ruby
class WatchersOfUser < ActiveRecord::Base
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attr_accessible :user_id, :watcher_id
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belongs_to :user
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validates_uniqueness_of :watcher_id, :scope => :user_id
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validate :validate_user
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validate :validate_watcher
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validates_presence_of :watcher_id, :user_id
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def self.watch_user(watcher_id, user_id)
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unless user_id == watcher_id
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@watchers_of_user = WatchersOfUser.new
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@watchers_of_user.watcher_id = watcher_id
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@watchers_of_user.user_id = user_id
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@watchers_of_user.save
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true
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else
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false
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end
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end
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def cancel_watching_user
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self.class.cancel_watching_user(self.watcher_id, self.user_id)
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end
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def self.cancel_watching_user(watcher_id, user_id)
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self.delete_all(["user_id = ? and watcher_id = ?", user_id, watcher_id])
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true
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end
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def self.find_users(watcher_id)
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@user = WatchersOfUser.find_by_sql("select * from users where id in (select user_id from #{WatchersOfUser.table_name} where watcher_id = #{watcher_id})")
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@user
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# @watch_table_for_user=WatchersOfUser.where(:watcher_id => watcher_id)
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# @user = []
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# @watch_table_for_user.each do |watch|
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# @user.push(watch.user)
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# end
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# @user
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end
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def self.find_watchers(user_id)
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@watcher = WatchersOfUser.find_by_sql("select * from users where id in (select watcher_id from #{WatchersOfUser.table_name} where user_id = #{user_id})")
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@watcher
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# user = User.find(user_id)
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# @watch_table_for_watcher = user.watchers_of_users
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# @watcher = []
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# @watch_table_for_watcher.each do |watch|
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# user_temp = User.find(watch.watcher_id)
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# @watcher.push(user_temp)
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# end
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# @watcher
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end
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#验证user是否存在
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def validate_user
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errors.add :user_id, :invalid if user.nil? || !user.active?
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end
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#验证watcher是否存在
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def validate_watcher
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user = User.where("id = ?", watcher_id).to_a.first
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errors.add :watcher_id, :invalid if user.nil? || !user.active?
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end
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end
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