Added regex to exempt abugidas from standard slugify. Added a unique_together constraint for CustomTag name and slug. Aaltered slug field to not be unique.

Author: BethanyG

project/tagging/models.py

@@ -1,4 +1,5 @@
 import uuid
+import regex
 from taggit.models import TagBase, GenericTaggedItemBase, TaggedItemBase
 from django.db import models
 from django.utils.text import slugify
@@ -8,34 +9,52 @@
 
 class CustomTag(TagBase):
     guid = models.UUIDField(default=uuid.uuid1, editable=False)
-    slug = models.SlugField(
-        verbose_name=_("Slug"),
-        unique=True,
-        max_length=100,
-        allow_unicode=True
-    )
+    slug = models.SlugField(verbose_name=_("Slug"),  max_length=100, allow_unicode=True)
     name = models.CharField(verbose_name=_("Name"), unique=True, max_length=100)
 
     class Meta:
         db_table = "tagging_custom_tag"
         verbose_name = _("Tag")
         verbose_name_plural = _("Tags")
         app_label = 'tagging'
-
-    def save(self, *args, **kwargs):
-        self.slug = self.slugify(self.name)
-        self.full_clean()
-        return super().save(*args, **kwargs)
+        unique_together = ('name', 'slug',)
 
     def slugify(self, tag, i=None):
-        return slugify(tag, allow_unicode=True)
+        abugidas = regex.compile(
+        u"[\p{Bengali}"
+        u"\p{Buhid}"
+        u"\p{Devanagari}"
+        u"\p{Gujarati}"
+        u"\p{Gurmukhi}"
+        u"\p{Hanunoo}"
+        u"\p{Kannada}"
+        u"\p{Khmer}"
+        u"\p{Lao}"
+        u"\p{Limbu}"
+        u"\p{Malayalam}"
+        u"\p{Mongolian}"
+        u"\p{Myanmar}"
+        u"\p{Phags-pa}"
+        u"\p{Sinhala}"
+        u"\p{Tagalog}"
+        u"\p{Tamil}"
+        u"\p{Telugu}"
+        u"\p{Thaana}"
+        u"\p{Thai}"
+        u"\p{Tibetan}"
+        u"\p{Yi}]+", regex.VERBOSE)
+
+        whitespace = regex.compile(u"\p{Z}+")
+
+        if regex.search(abugidas, tag):
+            return regex.sub(whitespace, '-', tag.strip().lower())
+        else:
+            return slugify(tag, allow_unicode=True)
+
 
 class TaggedItems(GenericTaggedItemBase, TaggedItemBase):
     tag = models.ForeignKey(
         CustomTag,
         on_delete=models.CASCADE,
         related_name="%(app_label)s_%(class)s_items",
     )
-
-    class Meta:
-        unique_together = ("content_type", "object_id", "tag")