Add GrMaster model with fillable attributes and relationships to Plant and Item

app/Models/GrMaster.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class GrMaster extends Model
+{
+     use SoftDeletes;
+
+    protected $fillable = [
+        "plant_id",
+        "item_id",
+        "serial_number",
+        "gr_number",
+        "created_at",
+        "created_by",
+        "updated_by",
+        "updated_at"
+    ];
+
+    public function plant(): BelongsTo
+    {
+        return $this->belongsTo(Plant::class);
+    }
+
+    public function item(): BelongsTo
+    {
+        return $this->belongsTo(Item::class);
+    }
+
+}