Made tag name field unique. Added index to "required" field for tag

boards/migrations/0010_auto_20150208_1451.py

@@ -0,0 +1,44 b''
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    def clean_duplicate_tags(apps, schema_editor):
+        Tag = apps.get_model('boards', 'Tag')
+        for tag in Tag.objects.all():
+            tags_with_same_name = Tag.objects.filter(name=tag.name).all()
+            if len(tags_with_same_name) > 1:
+                for tag_duplicate in tags_with_same_name[1:]:
+                    threads = tag_duplicate.thread_set.all()
+                    for thread in threads:
+                        thread.tags.add(tag)
+                    tag_duplicate.delete()
+
+    dependencies = [
+        ('boards', '0009_post_thread'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='post',
+            name='thread',
+            field=models.ForeignKey(to='boards.Thread', related_name='pt+'),
+            preserve_default=True,
+        ),
+        migrations.RunPython(clean_duplicate_tags),
+        migrations.AlterField(
+            model_name='tag',
+            name='name',
+            field=models.CharField(db_index=True, unique=True, max_length=100),
+            preserve_default=True,
+        ),
+        migrations.AlterField(
+            model_name='tag',
+            name='required',
+            field=models.BooleanField(db_index=True, default=False),
+            preserve_default=True,
+        ),
+    ]

boards/models/tag.py

@@ -34,8 +34,8 b' class Tag(models.Model, Viewable):'
         app_label = 'boards'
         ordering = ('name',)
 
-    name = models.CharField(max_length=100, db_index=True)
-    required = models.BooleanField(default=False)
+    name = models.CharField(max_length=100, db_index=True, unique=True)
+    required = models.BooleanField(default=False, db_index=True)
 
     def __str__(self):
         return self.name