validates :z, :presence => true, :numericality => {:greater_than => 0}
validates :t, :presence => true, :numericality => {:greater_than_or_equal_to => 0}
+ scope :with_sheet, -> do
+ includes(:sheet)
+ end
+
+ scope :find_index, -> do
+ with_sheet.where(Sheet.arel_table[:visible].gt 0).references(:sheet)
+ end
+
+ scope :find_private, -> (operators) do
+ with_sheet.where(Sheet.arel_table[:author_id].eq operators.author.id).references(:sheet)
+ end
+
+ scope :by_sheet, -> (sheet_id) do
+ where(sheet_id: sheet_id)
+ end
+
+ scope :find_by_sheet, -> (sheet_id) do
+ find_index.by_sheet(sheet_id).references(:sheet)
+ end
+
+ scope :find_by_panel, -> (panel_id) do
+ find_index.where(panel_id: panel_id).references(:sheet)
+ end
+
+ scope :find_by_author, -> (author_id) do
+ find_index.where(Sheet.arel_table[:author_id].eq author_id).references(:sheet)
+ end
+
+ scope :find_play, -> (sheet_id) do
+ find_by_sheet(sheet_id)
+ end
+
+ scope :find_private_play, -> (sheet_id, operators) do
+ find_private(operators).by_sheet(sheet_id)
+ end
+
def y
self.attributes['y']
end