move validators to central place since multiple models will start using it

core/validators.py

@@ -0,0 +1,14 @@
+from django.core.exceptions import ValidationError
+from django.utils.translation import gettext_lazy as _
+from monero.address import address
+
+
+def address_is_valid_monero(value):
+    try:
+        address(value)
+        return True
+    except ValueError:
+        raise ValidationError(
+            _('%(value)s is an invalid Monero address'),
+            params={'value': value},
+        )

items/migrations/0001_initial.py

@@ -4,6 +4,7 @@ from django.conf import settings
 from django.db import migrations, models
 import django.db.models.deletion
 import items.models
+import core.validators
 
 class Migration(migrations.Migration):
 
@@ -24,7 +25,7 @@ class Migration(migrations.Migration):
                 ('description', models.TextField(max_length=500)),
                 ('ask_price_xmr', models.FloatField()),
                 ('available', models.BooleanField(default=True)),
-                ('payout_address', models.CharField(max_length=100, validators=[items.models.address_is_valid_monero])),
+                ('payout_address', models.CharField(max_length=100, validators=[core.validators.address_is_valid_monero])),
                 ('owner', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='owner', to=settings.AUTH_USER_MODEL)),
             ],
         ),

items/models.py

@@ -1,26 +1,15 @@
 from os import path as os_path
 from secrets import token_urlsafe
 from django.db import models
-from django.core.exceptions import ValidationError
 from django.core.files.uploadedfile import InMemoryUploadedFile
-from django.utils.translation import gettext_lazy as _
 from django.contrib.auth.models import User
 from monero.address import address
 from PIL import Image, ExifTags
 from io import BytesIO
 from core.monero import AuctionDaemon
+from core.validators import address_is_valid_monero
 
 
-def address_is_valid_monero(value):
-    try:
-        address(value)
-        return True
-    except ValueError:
-        raise ValidationError(
-            _('%(value)s is an invalid Monero address'),
-            params={'value': value},
-        )
-
 class Item(models.Model):
     owner = models.ForeignKey(User, related_name='owner', on_delete=models.CASCADE)
     name = models.CharField(max_length=100)