Added sale order master model file

app/Models/SaleOrderMaster.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class SaleOrderMaster extends Model
+{
+    use SoftDeletes;
+
+    protected $fillable = [
+        'plant_id',
+        'item_id',
+        'sale_order_number',
+        'supplier_name',
+        'quantity',
+        'created_by',
+        'updated_by'
+    ];
+
+    public function plant(): BelongsTo
+    {
+        return $this->belongsTo(Plant::class);
+    }
+
+    public function item(): BelongsTo
+    {
+        return $this->belongsTo(Item::class);
+    }
+}