Php groupedFor-根据日期对对象进行分组

下面的代码不会根据约会日期对我的约会进行分组。属性date是DateTime对象（时间戳）

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您的模型中需要一个额外的getter。重命名该字段

/**
 * Get day of datetime
 *
 * @return int
 */
public function getDayOfDatetime()
{
    return (int)$this->date->format('d');
}

然后可将其用于分组

{appoints.dayOfDatetime}

<f:groupedFor each="{appointments}" as="appointmentofdate" groupBy="{f:format.date(date: date, format: 'd.m')}" groupKey="groupdate">

  {groupdate}:
  <br>
        <f:for each="{appointmentofdate}" as="appointment">

           {appointment.name} <br>
           {appointment.contact}

        </f:for>
        <hr>

</f:groupedFor>

02.09:
appointmentname1
Jerry Maier

appointmentname2
Esther Tannbaum

appointmentname3
Johnny Free
_____________________________________________
06.09:

appointmentname4
Otto Kringel

/**
 * Get day of datetime
 *
 * @return int
 */
public function getDayOfDatetime()
{
    return (int)$this->date->format('d');
}