如何在sequelize中对嵌套模型中的列进行排序？-Java 学习之路

我试图使用列startsAt以asc顺序检索scheduled_class模型 . 模型的关联如下 .

scheduled_class：class => m：1
class：老师=> 1：1
class：scheduled_class => 1：m

我首先查询schedule_class的数据库，然后包括与模型关联的类，然后包括与类模型关联的所有调度类，它们落在给定范围内 . 我能够在不订购数据的情况下检索数据 . 当我将order属性添加到sequelize时，它会产生以下错误 . 如何在asc命令中检索预定的类，以启动列启动？ `

“message”：“订单子句中的未知列'class.name'”，“code”：500，“className”：“general-error”，“data”：{}

module.exports = function () {
      return function (context) {
        const sequelize = context.app.get('sequelizeClient');
        context.params.sequelize = {
          raw: false,
          include: [ {model: sequelize.models.attendance, paranoid: true} ],
          order: []
        };
        if(context.params.query && context.params.query.includeClasses) {
          let startDate = new Date();
          startDate.setMonth(startDate.getMonth() -1);
          startDate.setDate(1);
          let endDate = new Date();
          endDate.setMonth(endDate.getMonth() + 2);
          endDate.setDate(0);
          context.params.sequelize.include.push(
            {
              model: sequelize.models.classes,
              paranoid: true,
              include:[
                {
                  model:sequelize.models.teacher,
                  paranoid: true
                },
                {
                  model:sequelize.models.scheduled_class,
                  paranoid: true,
                  where: {
                    startsAt: {
                      $gte: startDate
                    },
                    endsAt: {
                      $lte: endDate
                    }
                  },
                },
                ],
              order: [[sequelize.models.teacher, 'id', 'DESC']]
            });
          context.params.sequelize.order.push([sequelize.models.classes, 'name', 'DESC']);
          //context.params.sequelize.order.push([sequelize.models.teacher, 'id', 'DESC']);
          //context.params.sequelize.order.push([sequelize.models.scheduled_class, 'startsAt', 'DESC']);
          delete context.params.query.includeClasses;
        }
      };
    };

1 回答

我能够通过将父模型添加到order子句来解决问题 .

module.exports = function () {
  return function (context) {
    const sequelize = context.app.get('sequelizeClient');
    context.params.sequelize = {
      raw: false,
      include: [ {model: sequelize.models.attendance, paranoid: true} ],
      order: []
    };
    if(context.params.query && context.params.query.includeClasses) {
      let startDate = new Date();
      startDate.setMonth(startDate.getMonth() -1);
      startDate.setDate(1);
      let endDate = new Date();
      endDate.setMonth(endDate.getMonth() + 2);
      endDate.setDate(0);
      context.params.sequelize.include.push(
        {
          model: sequelize.models.classes,
          paranoid: true,
          include:[
            {
              model:sequelize.models.teacher,
              paranoid: true
            },
            {
              model:sequelize.models.scheduled_class,
              paranoid: true,
              where: {
                startsAt: {
                  $gte: startDate
                },
                endsAt: {
                  $lte: endDate
                }
              },
            },
            ],
        });
      context.params.sequelize.order.push([sequelize.models.classes, sequelize.models.scheduled_class, 'startsAt', 'ASC']);
      delete context.params.query.includeClasses;
    }
  };
};

在包含class => scheduled_class模型之后，我通过scheduled_class.startsAt ASC将订单推送到订单数组 .

回复于 2024-05-02T05:44:46+08:00

如何在sequelize中对嵌套模型中的列进行排序？

1 回答

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