update code

app/Entities/Document.php

@@ -0,0 +1,100 @@
+<?php
+
+namespace App\Entities;
+
+use Illuminate\Database\Eloquent\Model;
+use Prettus\Repository\Contracts\Transformable;
+use Prettus\Repository\Traits\TransformableTrait;
+
+/**
+ * Class Document.
+ *
+ * @package namespace App\Entities;
+ */
+class Document extends Model implements Transformable
+{
+    use TransformableTrait;
+    use \App\Traits\ActionCallable;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'id',
+        'symbol',
+        'abstract',
+        'book_id',
+        'type_id',
+        'signer_id',
+        'sign_at',
+        'creator_id',
+        'writer_id',
+        'effective_at',
+        'publisher_id',
+        'link_id',
+    ];
+
+    public $appends = [
+        'seen',
+    ];
+
+    protected $casts = [
+        'effective_at' => 'date:Y-m-d',
+        'sign_at' => 'date:Y-m-d',
+    ];
+
+    public function receivers(){
+        return $this->belongsToMany(User::class, 'document_receivers')->withPivot(['seen']);;
+    }
+
+    public function organizes(){
+        return $this->belongsToMany(Organize::class, 'document_organizes');
+    }
+
+    public function type(){
+        return $this->belongsTo(DocumentType::class, 'type_id');
+    }
+
+    public function attachments(){
+        return $this->hasMany(Attachment::class);
+    }
+
+    public function book(){
+        return $this->belongsTo(Book::class);
+    }
+
+    public function publisher(){
+        return $this->belongsTo(Organize::class, 'publisher_id');
+    }
+
+    public function signer(){
+        return $this->belongsTo(Signer::class);
+    }
+
+    public function creator(){
+        return $this->belongsTo(User::class, 'creator_id');
+    }
+
+    public function writer(){
+        return $this->belongsTo(User::class, 'writer_id');
+    }
+
+    public function linkTo(){
+        return $this->belongsTo(Document::class, 'link_id');
+    }
+
+    public function linked(){
+        return $this->hasMany(Document::class, 'link_id');
+    }
+
+    public function getSeenAttribute(){
+        $receiver = $this->receivers()->where('id', auth()->id())->first();
+        if($receiver){
+            return $receiver->pivot->seen;
+        }
+        return true;
+    }
+
+}