如何在 FeathersJs 中设置默认排序顺序 [英] How Can I set the default Sort order in FeathersJs

问题描述

我对 Feathersjs 有问题，与 sequalize 集成.如果我像下面这样设置默认分页，并且没有指定排序，它会因为生成的 SQL 语句无效而产生错误.

I have an issue with Feathersjs , integrating with sequalize. If I set the default pagination like below, and there is no sort specified it will generate an error because the SQL statement generated is invalid.

使用默认值 5 创建的服务:

Service Created with default of 5:

app.use('/manifests', service({
  paginate: {
    default: 5,
    max: 25
  }
}));

SQL 语句生成(设置限制为 20)

SQL Statement Generated ( setting a limit of 20 )

SELECT [id], ...etc
FROM [Manifest] AS [Manifest] OFFSET 0 ROWS FETCH NEXT 20 ROWS ONLY

设置默认订单是有意义的，但我不知道如何在服务中做到这一点.

It Makes sense to set a default order , but I am not sure how to do that in the service.

我想在这种情况下实现的SQL语句是

The SQL Statement I want to achieve in this case is

SELECT [id], ...etc
FROM [Manifest] AS [Manifest] ORDER BY Date desc OFFSET 0 ROWS FETCH NEXT 20 ROWS ONLY

我想以某种方式为此设置默认值..?

I would like to somehow set the default for this..?

app.use('/manifests', service({
  paginate: {
    default: 5,
    max: 25
  }
  sort:{
    default: date -1  ( or something ) 
  }
}));

推荐答案

Feathers hooks 允许您通过添加 $sort 常用查询参数 如果未设置:

Feathers hooks allow you to modify the query to what you need by adding the $sort common query parameter if it is not set:

app.service('/manifests').hooks({
  before(context) {
    const { query = {} } = context.params;

    if(!query.$sort) {
      query.$sort = {
        date: -1
      }
    }

    context.params.query = query;
  }
});

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