def insert_row(calendar, current_user, date):
row = CalendarRow(parent=calendar.key)
row.put()
cell_keys = []
for i in range(len(calendar.column_names)):
cell = Cell(parent=row.key)
cell.put()
cell_keys.append(cell.key)
date_cell = DateCell(parent=row.key, date=date)
date_cell.put()
row.cell_keys = cell_keys
row.date_cell = date_cell.key
row.put()
calendar.row_keys.append(row.key)
calendar.put()
