Laravel 获取所有类别的帖子数

Question

Hi, I'm trying to get Array contain all Categories with Number of Posts in each category: Ex:

[
{id: 1, name: "category1", posts: 15 },
{id: 2, name: "category2", posts: 33 },
{id: 3, name: "category3", posts: 27 }
]

详情：

帖子Table

public function up()
{
    Schema::create('posts', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->bigInteger('user_id')->unsigned();
        $table->foreign('user_id')->references('id')->on('users');
        $table->string('slug')->unique();
        $table->string('title');
        $table->string('image');
        $table->text('description');
        $table->integer('category_id')->unsigned();;
        $table->longText('content');
        $table->boolean('published')->default(0);
        $table->timestamps();
    });
}

类别Table

public function up()
{
    Schema::create('categories', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name')->unique();
        $table->timestamps();
    });
}

帖子模型

public function category()
{
  return $this->belongsTo('App\Models\Category');
}

类别模型

public function posts()
{
  return $this->hasMany('App\Models\Post');
}

类别控制器

public function index()
{
  $Categories  = Category::with('posts')->get();
  return response()->json($Categories);
}

但是这个函数 return 发布所有文件，是计算它们并将数字作为参数添加到数组中的方法吗？

Answer 1

您可以使用withCount

$categories = Category::withCount('posts')->get();

然后您可以遍历 $categories 并访问

$category->posts_count

每个类别。

Laravel 获取所有类别的帖子数

Laravel get all categories with posts count

php

sql

laravel

laravel-6