Update logic of creating and updating links and do not allow any special characters

.gitignore

@@ -63,6 +63,7 @@ coverage.xml
 .python-version
 
 3.12/lib/python3.12/site-packages/
+3.12/include
 
 # Tailwind CSS
 /static/css/dist/

links/views.py

@@ -72,6 +72,17 @@ class LinkCreateView(CreateView):
             initial['alias'] = alias
         return initial
 
+    def form_valid(self, form):
+        alias = form.cleaned_data.get('alias')
+        if not self.is_valid_alias(alias):
+            form.add_error('alias', _("Alias cannot contain special characters."))
+            return self.form_invalid(form)
+        return super().form_valid(form)
+
+    def is_valid_alias(self, alias):
+        # 检查别名是否包含特殊字符
+        return alias.isalnum()  # 只允许字母和数字
+
 class LinkUpdateView(UpdateView):
     model = Link
     form_class = LinkForm
@@ -79,13 +90,15 @@ class LinkUpdateView(UpdateView):
     success_url = reverse_lazy('link_list')
 
     def form_valid(self, form):
-        try:
-            return super().form_valid(form)
-        except ValidationError as e:
-            for field, errors in e.message_dict.items():
-                for error in errors:
-                    messages.error(self.request, f"{error}")
+        alias = form.cleaned_data.get('alias')
+        if not self.is_valid_alias(alias):
+            form.add_error('alias', _("Alias cannot contain special characters."))
             return self.form_invalid(form)
+        return super().form_valid(form)
+
+    def is_valid_alias(self, alias):
+        # 检查别名是否包含特殊字符
+        return alias.isalnum()  # 只允许字母和数字
 
     def form_invalid(self, form):
         for field, errors in form.errors.items():