开始官网模板

app/model/PostCategory.php

@@ -1,5 +1,6 @@
 <?php
-declare (strict_types = 1);
+
+declare(strict_types=1);
 
 namespace app\model;
 
@@ -10,5 +11,14 @@ use think\Model;
  */
 class PostCategory extends Model
 {
-    //
+  //
+  public function post()
+  {
+    return $this->belongsTo(Post::class, 'post_id');
+  }
+
+  public function category()
+  {
+    return $this->belongsTo(Category::class,'category_id');
+  }
 }