instancecache trait

app/Models/Concerns/InstanceCache.php

@@ -0,0 +1,37 @@
+<?php
+
+
+namespace App\Models\Concerns;
+
+
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * Instance cache, used to avoid multiple retrieval of related models.
+ * Repeated calls to getCached() all return the same instance, without
+ * additional DB access.
+ */
+trait InstanceCache
+{
+    private static $instanceCache = [];
+
+    public static function bootInstanceCache()
+    {
+        self::retrieved(function (Model $instance) {
+            self::$instanceCache[$instance->getKey()] = $instance;
+        });
+    }
+
+    /**
+     * Find entity by ID, either in DB, or in the internal cache.
+     *
+     * @param int $id
+     * @return Model|null
+     */
+    public static function getCached($id)
+    {
+        return isset(self::$instanceCache[$id]) ?
+            self::$instanceCache[$id] :
+            (self::$instanceCache[$id] = self::find($id));
+    }
+}

app/Models/Table.php

@@ -37,6 +37,12 @@ class Table extends Model
     use Reportable;
     protected $guarded = [];
 
+    /** Get owner from the instance cache (use when building table lists) */
+    public function cachedOwner()
+    {
+        return User::getCached($this->owner_id);
+    }
+
     /** Owning user */
     public function owner()
     {

app/Models/User.php

@@ -3,6 +3,7 @@
 namespace App\Models;
 
 use AdamWathan\EloquentOAuth\OAuthIdentity;
+use App\Models\Concerns\InstanceCache;
 use App\Models\Concerns\Reportable;
 use Illuminate\Database\Eloquent\Collection;
 use Illuminate\Notifications\Notifiable;
@@ -38,6 +39,7 @@ class User extends Authenticatable
 {
     use Reportable;
     use Notifiable;
+    use InstanceCache;
 
     /**
      * The attributes that are mass assignable.