[feature] record testdata last update

Author: szdytom

judger/serializers.py

@@ -46,5 +46,6 @@ class Meta:
             'time_limit',
             'memory_limit',
             'testdata_url',
+            'testdata_last_update',
         ]
 

problem/migrations/0016_problem_testdata_last_update.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.1.6 on 2021-02-10 08:18
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('problem', '0015_auto_20210204_1401'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='problem',
+            name='testdata_last_update',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+    ]

problem/models.py

@@ -26,6 +26,7 @@ class Problem(models.Model):
     memory_limit = models.IntegerField(default=128000)
 
     testdata_url = models.TextField(blank=True, null=True)
+    testdata_last_update = models.DateTimeField(blank=True, null=True)
 
     class Meta:
         permissions = ( # (permission name, promission explanation)

problem/views.py

@@ -2,6 +2,7 @@
 from django.utils.decorators import method_decorator
 from django.contrib.auth.decorators import permission_required
 from django.db.models import Max
+from django.utils import timezone
 
 from rest_framework.response import Response
 from rest_framework.views import APIView
@@ -92,6 +93,7 @@ def patch(self, request, pid):
         new_value = request.data['testdata_url']
         problem = get_object_or_404(Problem, pid=pid)
         problem.testdata_url = new_value
+        problem.testdata_last_update = timezone.now()
         problem.save()
 
         return Response(status=status.HTTP_204_NO_CONTENT)
@@ -101,6 +103,7 @@ def patch(self, request, pid):
     def delete(self, request, pid):
         problem = get_object_or_404(Problem, pid=pid)
         problem.testdata_url = None
+        problem.testdata_last_update = timezone.now()
         problem.save()
 
         return Response(status=status.HTTP_204_NO_CONTENT)