1 files changed, 22 insertions, 0 deletions
diff --git a/tagging/forms.py b/tagging/forms.py
new file mode 100644
index 0000000..875c598
--- /dev/null
+++ b/tagging/forms.py
@@ -0,0 +1,22 @@
+from django import newforms as forms
+
+from tagging.utils import get_tag_name_list
+from tagging.validators import tag_list_re
+
+class TagField(forms.CharField):
+    def clean(self, value):
+        """
+        Validates that the input is a valid list of tag names,
+        separated by a single comma, a single space or a comma
+        followed by a space.
+        """
+        value = super(TagField, self).clean(value)
+        if value == u'':
+            return value
+        if not tag_list_re.search(value):
+            raise forms.ValidationError(u'Tag names must contain only unicode alphanumeric characters, numbers, underscores or hyphens, with a comma, space or comma followed by space used to separate each tag name.')
+        tag_names = get_tag_name_list(value)
+        for tag_name in tag_names:
+            if len(tag_name) > 50:
+                raise forms.ValidationError(u'Tag names must be no longer than 50 characters.')
+        return value