ここには、いいね、コメント、コンテンツ、ビューに関する統計を収集する必要があるクラスがあります
class UsersActivityTable
def initialize(user_ids, content_ids, start_date, end_date)
@user_ids, @content_ids, @start_date, @end_date = user_ids, content_ids, start_date, end_date
end
def rows
@rows ||= @user_ids.map do |user_id|
OpenStruct.new( :full_name => sum_users(user_id),
:contributed => sum_contributed(user_id),
:interacted => sum_interacted(user_id)
)
end
end
private
def sum_users(user_id)
@sum_users ||= Hash[ User.value_of(:id, :first_name, :last_name).map{|usr| [usr[0], "#{usr[1]} #{usr[2]}"] } ]
@sum_users[user_id]
end
def sum_contributed(user_id)
@sum_contributed ||= Content.where(:user_id => @user_ids, :id => @content_ids)
.where('date(created_at) between ? and ? ', @start_date, @end_date)
.group(:user_id)
.count
@sum_contributed[user_id].to_i
end
def sum_interacted(user_id)
sum_comments(user_id).to_i + sum_views(user_id).to_i + sum_likes(user_id).to_i
end
def sum_comments(user_id)
@sum_comments ||= Comment.where(:user_id => @user_ids, :content_id => @content_ids)
.where('date(created_at) between ? and ? ', @start_date, @end_date)
.group(:user_id)
.count
@sum_comments[user_id]
end
def sum_likes(user_id)
@sum_likes ||= Like.where(:user_id => @user_ids, :content_id => @content_ids)
.where('date(created_at) between ? and ? ', @start_date, @end_date)
.group(:user_id)
.count
@sum_likes[user_id]
end
def sum_views(user_id)
@sum_views ||= View.where(:viewable_type => 'Content', :user_id => @user_ids, :viewable_id => @content_ids)
.where('date(created_at) between ? and ? ', @start_date, @end_date)
.group(:user_id)
.count
@sum_views[user_id]
end
end
ご覧のとおり、いくつかの重複があります。
.where('date(created_at) between ? and ? ', @start_date, @end_date)
.group(:user_id)
.count
エンティティごとに実行します。条件ラムダなどを適用する方法はありますか?
私が可能だと思うのは、コレクションインスタンスでメソッドを定義して呼び出すことです:
# pseudo code
group_results = lambda{|el| el.where('date(created_at) between ? and ? ', @start_date, @end_date)
.group(:user_id)
.count }
Content.where(...).tap{|collection| collection.defune_method .... }.group_results