diff --git a/app/Collection.php b/app/Collection.php
index 2e46078c2..0905f2717 100644
--- a/app/Collection.php
+++ b/app/Collection.php
@@ -2,6 +2,7 @@
 
 namespace App;
 
+use Illuminate\Support\Str;
 use Illuminate\Database\Eloquent\Model;
 use Pixelfed\Snowflake\HasSnowflakePrimary;
 
@@ -16,8 +17,32 @@ class Collection extends Model
      */
     public $incrementing = false;
 
+    public $fillable = ['profile_id', 'published_at'];
+
 	public function profile()
 	{
 		return $this->belongsTo(Profile::class);
 	}
+
+    public function items()
+    {
+        return $this->hasMany(CollectionItem::class);
+    }
+
+    public function posts()
+    {
+        return $this->hasManyThrough(
+            Status::class,
+            CollectionItem::class,
+            'collection_id',
+            'id',
+            'id',
+            'object_id',
+        );
+    }
+
+    public function url()
+    {
+        return url("/c/{$this->id}");
+    }
 }
diff --git a/app/CollectionItem.php b/app/CollectionItem.php
index 0a3f72cb8..d272e68a4 100644
--- a/app/CollectionItem.php
+++ b/app/CollectionItem.php
@@ -9,6 +9,13 @@ class CollectionItem extends Model
 {
 	use HasSnowflakePrimary;
 
+    public $fillable = [
+        'collection_id',
+        'object_type',
+        'object_id',
+        'order'
+    ];
+    
     /**
      * Indicates if the IDs are auto-incrementing.
      *