chore: update document approval workflow and bug fixes

Modules/MaterialLogistics/app/Models/InventoryBatch.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Modules\MaterialLogistics\Models;
+
+use App\Traits\HasPublicIdentifier;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Modules\MasterData\Models\Material;
+
+class InventoryBatch extends Model
+{
+    use HasPublicIdentifier;
+
+    protected $fillable = [
+        'warehouse_id', 'material_id', 'material_requisition_id', 'purchase_order_id',
+        'quantity', 'unit_cost',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'quantity' => 'decimal:2',
+            'unit_cost' => 'decimal:2',
+        ];
+    }
+
+    public function warehouse(): BelongsTo
+    {
+        return $this->belongsTo(Warehouse::class);
+    }
+
+    public function material(): BelongsTo
+    {
+        return $this->belongsTo(Material::class);
+    }
+
+    public function requisition(): BelongsTo
+    {
+        return $this->belongsTo(MaterialRequisition::class, 'material_requisition_id');
+    }
+
+    public function purchaseOrder(): BelongsTo
+    {
+        return $this->belongsTo(PurchaseOrder::class, 'purchase_order_id');
+    }
+}