max length of slug is 255

apps/news/migrations/0023_auto_20191023_0903.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.4 on 2019-10-23 09:03
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('news', '0022_auto_20191021_1306'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='news',
+            name='slug',
+            field=models.SlugField(max_length=255, unique=True, verbose_name='News slug'),
+        ),
+    ]

apps/news/models.py

@@ -139,7 +139,7 @@ class News(BaseAttributes, TranslatedFieldsMixin):
     start = models.DateTimeField(verbose_name=_('Start'))
     end = models.DateTimeField(blank=True, null=True, default=None,
                                verbose_name=_('End'))
-    slug = models.SlugField(unique=True, max_length=50,
+    slug = models.SlugField(unique=True, max_length=255,
                             verbose_name=_('News slug'))
     playlist = models.IntegerField(_('playlist'))
     state = models.PositiveSmallIntegerField(default=WAITING, choices=STATE_CHOICES,