use picklefield

feeds/migrations/0010_auto_20210312_0214.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.1.7 on 2021-03-11 23:14
+
+from django.db import migrations
+import picklefield.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('feeds', '0009_auto_20210312_0211'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='feed',
+            name='last_id',
+            field=picklefield.fields.PickledObjectField(blank=True, editable=False, null=True),
+        ),
+    ]

feeds/models.py

@@ -4,6 +4,7 @@ from django.contrib.contenttypes.models import ContentType
 from django.core.cache import cache
 from django.db import models
 from django.utils import timezone
+from picklefield import PickledObjectField
 from telebot import TeleBot
 from yamlfield.fields import YAMLField
 
@@ -16,7 +17,7 @@ class Feed(models.Model):
     chat_id = models.CharField(max_length=33)
     check_interval = models.DurationField(help_text='in seconds')
     last_check = models.DateTimeField(null=True, blank=True)
-    last_id = models.JSONField(null=True, blank=True)
+    last_id = PickledObjectField(null=True, blank=True)
 
     config_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
     config_id = models.PositiveIntegerField()