diff --git a/gawa/blog/migrations/0002_alter_blogpost_slug.py b/gawa/blog/migrations/0002_alter_blogpost_slug.py
new file mode 100644
index 0000000..d9fadbb
--- /dev/null
+++ b/gawa/blog/migrations/0002_alter_blogpost_slug.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.2.5 on 2023-10-02 19:03
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('blog', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='blogpost',
+            name='slug',
+            field=models.SlugField(unique=True),
+        ),
+    ]
diff --git a/gawa/blog/models.py b/gawa/blog/models.py
index 0bc6f2c..89bc886 100644
--- a/gawa/blog/models.py
+++ b/gawa/blog/models.py
@@ -76,7 +76,7 @@ class BlogPost(Searchable):
     body_de = models.TextField(blank=True,
                                default="""This aritcle is not available in english.""")
     category = models.ForeignKey(
-        Category, on_delete=models.SET_DEFAULT, null=False,
+        Category, on_delete=models.SET_DEFAULT, blank=False,
         default=Category.get_or_create_uncategorized)
     thumbnail = models.ImageField(
         blank=True,
@@ -85,7 +85,15 @@ class BlogPost(Searchable):
     featured = models.BooleanField(default=False)
     langs = models.CharField(
         default=DEFAULT_LANGS.__repr__(), max_length=64)
-    slug = models.SlugField()
+    slug = models.SlugField(unique=True, blank=False)
+
+    def save(self):
+        # check if the slug is empty if we remove whitespaces
+        if len(self.slug.strip()) == 0:
+            logger.error(
+                f"trying to save '{self.__class__}' with empty slug: {self}")
+            raise ValueError(f"trying to save '{self.__class__}' with empty slug: {self}")
+        super().save()
 
     def regenerate(self):
         """
@@ -239,7 +247,9 @@ class BlogPost(Searchable):
             try:
                 matches = re.match(regex, file[0])
                 if matches is None:
+                    # file is not a toml / meta file
                     files.remove(file)
+                    continue
                 else:
                     current_lang = matches.group(1)
                     file[1] = matches.group(1)
diff --git a/gawa/start/models.py b/gawa/start/models.py
index 71a8d0e..b81660f 100644
--- a/gawa/start/models.py
+++ b/gawa/start/models.py
@@ -75,7 +75,7 @@ class Searchable(models.Model):
 
 class StaticSite(Searchable):
     """
-    This model represents any static site, such as start:index, 
+    This model represents any static site, such as start:index,
     that should show up in search.
 
     Every searchable view should inherit from start.views.SearchableView.