Question

我有三种通过hasMany关系关联的模型：Course / Lesson / Article-一个Course hasMany Lessons其中hasMany {{1 }}。
我的Articles表中有一个int列，名为articles（位置的缩写），我想以此来订购文章。
我在pos中使用以下查询，但未通过此CoursesController属性对文章进行排序：

公共功能展示（课程$课程，课程$课程，文章$ articles） { $ articles = $ lesson-> articles（）-> orderBy（'pos'，'asc'）-> get（）; 返回视图（'users.courses.show'，紧凑型（'course'，'课程'， “文章”））； }

我正在刀片中使用foreach循环：

pos

任何帮助将不胜感激！

Laravel调试栏显示以下结果：

从@foreach($lesson->articles as $article) {{ $article->title }} @endforeach中选择*，其中articles ='this-is-article-one'limit 1       13.27ms \ vendor \ laravel \ framework \ src \ Illuminate \ Routing \ ImplicitRouteBinding.php：35

从slug中选择*，其中articles = 1并且lesson_id <2由pos排序desc限制1660μs\ app \ Http \ Controllers \ Users \ ArticlesController.php ：55

从pos中选择*，其中articles = 1且lesson_id> 2由pos排序asc限制1520μs\ app \ Http \ Controllers \ Users \ ArticlesController.php ：59

从pos中选择*，其中courses。courses = 2个极限1,610μsview :: users.articles.show：7

从id中选择*，其中lessons。lessons = 1个极限1530μs       view :: users.articles.show：8

从id中选择*，其中articles。articles = 1且lesson_id。articles不为空

Answer 1

在显示视图中再次调用$lesson->articles时，基本上就是进行新的数据库调用。要获取正确的值，请使用变量$articles：

@foreach($articles as $article)
   {{ $article->title }}
@endforeach

Answer 2

如果您想继续使用视图中的lesson对象，请使用sortBy：

@foreach($lesson->articles->sortBy('pos') as $article)
   {{ $article->title }}
@endforeach

Answer 3

我建议您与orderBy（）扩大关系

"dependencies": {
    "@angular/animations": "8.0.0",
    "@angular/common": "8.0.0",
    "@angular/compiler": "8.0.0",
    "@angular/core": "8.0.0",
    "@angular/forms": "8.0.0",
    "@angular/http": "8.0.0-beta.10",
    "@angular/platform-browser": "8.0.0",
    "@angular/platform-browser-dynamic": "8.0.0",
    "@angular/router": "8.0.0",
    "font-awesome": "^4.7.0",
    "nativescript-accordion": "^6.0.0-beta.2",
    "nativescript-angular": "8.0.2",
    "nativescript-checkbox": "^3.0.3",
    "nativescript-drop-down": "^4.0.1",
    "nativescript-feedback": "^1.3.9",
    "nativescript-geolocation": "5.1.0",
    "nativescript-iqkeyboardmanager": "^1.3.0",
    "nativescript-loading-indicator": "^2.4.0",
    "nativescript-ng-ripple": "^2.0.1",
    "nativescript-phone": "^1.4.0",
    "nativescript-plugin-firebase": "9.0.2",
    "nativescript-ratings": "^1.0.1",
    "nativescript-theme-core": "~1.0.4",
    "nativescript-ui-listview": "7.0.0",
    "reflect-metadata": "~0.1.10",
    "rxjs": "~6.4.0",
    "tns-core-modules": "^6.1.1",
    "zone.js": "0.9.1"
  },
  "devDependencies": {
    "@angular/compiler-cli": "8.2.0",
    "@nativescript/schematics": "~0.4.0",
    "@ngtools/webpack": "8.2.0",
    "nativescript-dev-webpack": "^1.2.0",
    "tns-platform-declarations": "6.0.1",
    "typescript": "3.4.5"
  }
```

Laravel 5.7-“ orderBy”未排序结果

3 个答案: