reconstruction of the project

app/Models/ClassPrepAdjustment.php

@@ -2,11 +2,15 @@
 
 namespace App\Models;
 
-use Illuminate\Database\Eloquent\Model;
+use App\Models\BaseModel;
 
-class ClassPrepAdjustment extends Model
+class ClassPrepAdjustment extends BaseModel
 {
     protected $table = 'class_prep_adjustments';
+
+    // CI model didn't use timestamps; keep off unless your table has updated_at/created_at auto-managed.
+    public $timestamps = false;
+
     protected $fillable = [
         'class_section_id',
         'item_name',
@@ -15,5 +19,15 @@ class ClassPrepAdjustment extends Model
         'school_year',
         'created_at',
     ];
-    public $timestamps = false;
+
+    protected $casts = [
+        'class_section_id' => 'integer',
+        'adjustment'       => 'integer',  // change to 'decimal:2' if it's not an int
+    ];
+
+    // Optional relationship
+    public function classSection()
+    {
+        return $this->belongsTo(ClassSection::class, 'class_section_id');
+    }
 }