Added columns in model files of Item and line and production plan and production quantity

app/Models/Item.php

@@ -12,6 +12,7 @@ class Item extends Model
 
     protected $fillable = [
         'plant_id',
+        'line_id',
         'category',
         'code',
         'description',
@@ -19,11 +20,16 @@ class Item extends Model
         'uom',
     ];
 
-    public function plant(): BelongsTo
+    public function plant()
     {
         return $this->belongsTo(Plant::class);
     }
 
+    public function item()
+    {
+        return $this->belongsTo(Item::class, 'item_id', 'id');
+    }
+
     public function stickerMasters()
     {
         return $this->hasMany(StickerMaster::class, 'item_id', 'id');