如何在sequelize中对嵌套模型中的列进行排序？

Posted 2023-03-08

【中文标题】如何在sequelize中对嵌套模型中的列进行排序？

【英文标题】：How to order columns in nested models in sequelize?

【发布时间】：2018-10-22 17:37:07

【问题描述】：

我正在尝试使用列startAt 以asc 顺序检索scheduled_class 模型。 模型的关联如下。

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

我首先在数据库中查询 schedule_class，然后包括与模型关联的类，然后包括与类模型关联的所有计划类，它们属于给定范围。我能够在不订购数据的情况下检索数据。当我添加 order 属性以进行续集时，它会出现以下错误。如何按照列startsAt 的asc 顺序检索预定的课程？ `

"message":"'order clause' 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;
        
      ;
    ;

【参考方案1】：

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;
    
  ;
;

在这里包含 class=> scheduled_class 模型后，我通过 schedule_class.startsAt ASC 将订单推送到订单数组。