init project

app/models/concerns/base_model.rb

@@ -0,0 +1,34 @@
+module BaseModel
+  extend ActiveSupport::Concern
+
+  included do
+    scope :recent,      -> { order(id: :desc) }
+    scope :exclude_ids, -> (ids) { where.not(id: ids.map(&:to_i)) }
+    scope :by_ids,      -> (ids) { where(id: ids) unless ids.blank? }
+    scope :by_week,     -> { where("created_at > ?", 7.days.ago.utc) }
+
+    delegate :url_helpers, to: 'Rails.application.routes'
+  end
+
+  # FIXME: 需要原子化操作
+  def push(hash)
+    hash.each_key do |key|
+      self.send("#{key}_will_change!")
+      old_val = self[key] || []
+      old_val << hash[key].to_i
+      old_val.uniq!
+      update_attributes(key => old_val)
+    end
+  end
+
+  # FIXME: 需要原子化操作
+  def pull(hash)
+    hash.each_key do |key|
+      self.send("#{key}_will_change!")
+      old_val = self[key]
+      return true if old_val.blank?
+      old_val.delete(hash[key].to_i)
+      update_attributes(key => old_val)
+    end
+  end
+end