[fix] reorder posts

db/main/admin.py

@@ -0,0 +1,13 @@
+from django.contrib import admin
+from admin_ordering.admin import OrderableAdmin
+from .models import *
+
+# Register your models here.
+
+
+@admin.register(Post)
+class PostModelAdmin(OrderableAdmin, admin.ModelAdmin):
+    list_display = ['title', 'ordering']
+    list_editable = ['ordering']
+    ordering_field_hide_input = True
+    exclude = ['ordering']

db/main/migrations/0002_alter_post_options_post_ordering.py

@@ -0,0 +1,22 @@
+# Generated by Django 4.0.5 on 2022-07-25 13:45
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='post',
+            options={'ordering': ['ordering'], 'verbose_name': 'Ogłoszenie', 'verbose_name_plural': 'Ogłoszenia'},
+        ),
+        migrations.AddField(
+            model_name='post',
+            name='ordering',
+            field=models.IntegerField(default=0, verbose_name='Kolejność'),
+        ),
+    ]

db/main/models.py

@@ -1,11 +1,12 @@
 from django.db import models
 from tinymce.models import HTMLField
+from admin_ordering.models import OrderableModel
 from core.utils import SingletonModel
 
 # Create your models here.
 
 
-class Post(models.Model):
+class Post(OrderableModel):
     title = models.CharField('Tytuł', max_length=250)
     content = HTMLField('Treść')
     created_at = models.DateTimeField(auto_now_add=True)
@@ -13,10 +14,9 @@ class Post(models.Model):
     def __str__(self):
         return self.title
 
-    class Meta:
+    class Meta(OrderableModel.Meta):
         verbose_name = 'Ogłoszenie'
         verbose_name_plural = 'Ogłoszenia'
-        ordering = ['-created_at']
 
 
 class GrandPrixW(SingletonModel):