discourse/app/models/group_user.rb

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class GroupUser < ActiveRecord::Base
belongs_to :group, counter_cache: "user_count"
belongs_to :user
after_save :update_title
after_destroy :remove_title
after_save :set_primary_group
after_destroy :remove_primary_group
protected
def set_primary_group
if group.primary_group
self.class.exec_sql("UPDATE users
SET primary_group_id = :id
WHERE id = :user_id",
id: group.id, user_id: user_id)
end
end
def remove_primary_group
self.class.exec_sql("UPDATE users
SET primary_group_id = NULL
WHERE id = :user_id AND primary_group_id = :id",
id: group.id, user_id: user_id)
end
def remove_title
if group.title.present?
self.class.exec_sql("UPDATE users SET title = NULL
WHERE title = :title AND id = :id",
id: user_id,
title: group.title)
end
end
def update_title
if group.title.present?
self.class.exec_sql("UPDATE users SET title = :title
WHERE (title IS NULL OR title = '') AND id = :id",
id: user_id,
title: group.title)
end
end
end
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# == Schema Information
#
# Table name: group_users
#
# id :integer not null, primary key
# group_id :integer not null
# user_id :integer not null
# created_at :datetime not null
# updated_at :datetime not null
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#
# Indexes
#
# index_group_users_on_group_id_and_user_id (group_id,user_id) UNIQUE
#