reconstruction of the project

app/Models/ReimbursementBatchAdminFile.php

@@ -2,11 +2,18 @@
 
 namespace App\Models;
 
-use Illuminate\Database\Eloquent\Model;
+use App\Models\BaseModel;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
-class ReimbursementBatchAdminFile extends Model
+class ReimbursementBatchAdminFile extends BaseModel
 {
     protected $table = 'reimbursement_batch_admin_files';
+
+    /**
+     * Your table uses uploaded_at (not created_at/updated_at).
+     */
+    public $timestamps = false;
+
     protected $fillable = [
         'batch_id',
         'admin_id',
@@ -15,5 +22,65 @@ class ReimbursementBatchAdminFile extends Model
         'uploaded_at',
         'uploaded_by',
     ];
-    public $timestamps = false;
+
+    protected $casts = [
+        'batch_id'     => 'integer',
+        'admin_id'     => 'integer',
+        'uploaded_by'  => 'integer',
+        'uploaded_at'  => 'datetime',
+    ];
+
+    /* ============================================================
+     * Relationships (optional but recommended)
+     * ============================================================
+     */
+
+    public function batch(): BelongsTo
+    {
+        return $this->belongsTo(ReimbursementBatch::class, 'batch_id');
+    }
+
+    public function admin(): BelongsTo
+    {
+        // Change Admin to your actual user/admin model if different
+        return $this->belongsTo(Admin::class, 'admin_id');
+    }
+
+    public function uploader(): BelongsTo
+    {
+        // If uploaded_by references the same admins/users table
+        return $this->belongsTo(Admin::class, 'uploaded_by');
+    }
+
+    /* ============================================================
+     * Convenience helpers
+     * ============================================================
+     */
+
+    /**
+     * Create an admin file row and auto-set uploaded_at if missing.
+     */
+    public static function createForBatch(array $data): self
+    {
+        if (empty($data['uploaded_at'])) {
+            $data['uploaded_at'] = now();
+        }
+
+        return static::create($data);
+    }
+
+    /**
+     * Optional: validation rules helper (use in FormRequest/controller).
+     */
+    public static function rules(bool $updating = false): array
+    {
+        return [
+            'batch_id'           => [$updating ? 'sometimes' : 'required', 'integer', 'min:1', 'exists:reimbursement_batches,id'],
+            'admin_id'           => [$updating ? 'sometimes' : 'required', 'integer', 'min:1', 'exists:admins,id'], // adjust table
+            'filename'           => [$updating ? 'sometimes' : 'required', 'string', 'max:255'],
+            'original_filename'  => ['nullable', 'string', 'max:255'],
+            'uploaded_at'        => ['nullable', 'date'],
+            'uploaded_by'        => ['nullable', 'integer'],
+        ];
+    }
 }