use picklefield

Pipfile

@@ -36,6 +36,7 @@ psycopg2-binary = "*"
 hiredis = "*"
 twisted = {extras = ["http2", "tls"], version = "*"}
 whitenoise = "*"
+django-picklefield = "*"
 
 [dev-packages]
 

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "af0051ce4cbe3965f9d19d33c2b4ce64f6fa9d4732a9e254979bade34c27664f"
+            "sha256": "97d73a69d57a13005810833cb3d8c3d066ab7a1c934731069061a622f0e3880a"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -278,6 +278,14 @@
             "index": "pypi",
             "version": "==0.1.6"
         },
+        "django-picklefield": {
+            "hashes": [
+                "sha256:15ccba592ca953b9edf9532e64640329cd47b136b7f8f10f2939caa5f9ce4287",
+                "sha256:3c702a54fde2d322fe5b2f39b8f78d9f655b8f77944ab26f703be6c0ed335a35"
+            ],
+            "index": "pypi",
+            "version": "==3.0.1"
+        },
         "django-redis-cache": {
             "hashes": [
                 "sha256:9a2eebef421d996a82098a19d17ff6b321265cd73178fa398913019764e8394a"
@@ -773,7 +781,7 @@
                 "sha256:407fa1e8eb3458d1b5614df51d9651a1180ea5fedf07feb46e45d7e25e6d6cdd",
                 "sha256:d3a5ea5b350423f47d07639f74475afedad48cf41c0ad7a82ca13a3928af34f6"
             ],
-            "markers": "python_version >= '3.0'",
+            "markers": "python_version >= '3'",
             "version": "==2.2"
         },
         "sqlparse": {

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()