分类模型和数据

app/Models/Category.php

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+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Category extends Model
+{
+    protected $fillable = [
+        'name', 'description',
+    ];
+}

database/migrations/2019_09_19_191731_create_categories_table.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateCategoriesTable extends Migration
+{
+    public function up()
+    {
+        Schema::create('categories', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('name')->index()->comment('名称');
+            $table->text('description')->nullable()->comment('描述');
+            $table->integer('post_count')->default(0)->comment('帖子数');
+        });
+    }
+
+    public function down()
+    {
+        Schema::dropIfExists('categories');
+    }
+}

database/migrations/2019_09_19_192022_seed_categories_data.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class SeedCategoriesData extends Migration
+{
+    public function up()
+    {
+        $categories = [
+            [
+                'name'        => '分享',
+                'description' => '分享创造，分享发现',
+            ],
+            [
+                'name'        => '教程',
+                'description' => '开发技巧、推荐扩展包等',
+            ],
+            [
+                'name'        => '问答',
+                'description' => '请保持友善，互帮互助',
+            ],
+            [
+                'name'        => '公告',
+                'description' => '站点公告',
+            ],
+        ];
+
+        DB::table('categories')->insert($categories);
+    }
+
+    public function down()
+    {
+        DB::table('categories')->truncate();
+    }
+}