From 4f3da1a88ba6ed2a4cbbd6918d096a401315ad00 Mon Sep 17 00:00:00 2001
From: Benjamin Dauvergne <bdauvergne@entrouvert.com>
Date: Tue, 24 Aug 2021 10:02:54 +0200
Subject: [PATCH] models: prevent too long error on Origin.slug (#54047)

---
 .../migrations/0002_auto_20210824_0957.py     | 25 +++++++++++++++++++
 fargo/fargo/models.py                         | 14 ++++++++---
 2 files changed, 36 insertions(+), 3 deletions(-)
 create mode 100644 fargo/fargo/migrations/0002_auto_20210824_0957.py

diff --git a/fargo/fargo/migrations/0002_auto_20210824_0957.py b/fargo/fargo/migrations/0002_auto_20210824_0957.py
new file mode 100644
index 0000000..a2a830f
--- /dev/null
+++ b/fargo/fargo/migrations/0002_auto_20210824_0957.py
@@ -0,0 +1,25 @@
+# Generated by Django 2.2.19 on 2021-08-24 07:57
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('fargo', '0001_squashed_0017_auto_20180331_1532'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='origin',
+            name='label',
+            field=models.TextField(verbose_name='Label'),
+        ),
+        migrations.AlterField(
+            model_name='origin',
+            name='slug',
+            field=models.SlugField(max_length=256, verbose_name='Slug'),
+        ),
+    ]
diff --git a/fargo/fargo/models.py b/fargo/fargo/models.py
index a871b17..11f052e 100644
--- a/fargo/fargo/models.py
+++ b/fargo/fargo/models.py
@@ -16,6 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
+import hashlib
 import subprocess
 import os
 import re
@@ -42,14 +43,21 @@ from jsonfield import JSONField
 from . import utils, managers
 
 
+def slug_truncate(label, length=256):
+    slug = slugify(label)
+    if len(slug) < length:
+        return slug
+    return slug[:length - 5] + '-%4s' % hashlib.md5(label.encode()).hexdigest()[:4]
+
+
 @python_2_unicode_compatible
 class Origin(models.Model):
-    label = models.CharField(_('Label'), max_length=80)
-    slug = models.SlugField(_('Slug'))
+    label = models.TextField(_('Label'))
+    slug = models.SlugField(_('Slug'), max_length=256)
 
     def save(self, *args, **kwargs):
         if not self.slug:
-            self.slug = slugify(self.label)
+            self.slug = slug_truncate(self.label)
         return super(Origin, self).save(*args, **kwargs)
 
     def __str__(self):
-- 
2.32.0.rc0