Merge pull request #28 from xoliqberdiyev/test

fix

core/apps/products/management/commands/import_units.py

@@ -18,5 +18,4 @@ class Command(BaseCommand):
             Unity.objects.get_or_create(
                 value=item['name']['uz']
             )
-
         self.stdout.write("Units added")

core/apps/products/models/unity.py

@@ -5,7 +5,7 @@ from core.apps.shared.models import BaseModel
 
 
 class Unity(BaseModel):
-    value = models.CharField(max_length=50)
+    value = models.CharField(max_length=50, unique=True)
 
     def __str__(self):
         return self.value