add some unique constraints here and there to ensure data integrity

camps/migrations/0018_auto_20170128_1841.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2017-01-28 17:41
+from __future__ import unicode_literals
+
+import django.contrib.postgres.fields.ranges
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('camps', '0017_remove_camp_description'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='camp',
+            name='buildup',
+            field=django.contrib.postgres.fields.ranges.DateTimeRangeField(help_text=b'The camp buildup period.', verbose_name=b'Buildup Period'),
+        ),
+        migrations.AlterField(
+            model_name='camp',
+            name='camp',
+            field=django.contrib.postgres.fields.ranges.DateTimeRangeField(help_text=b'The camp period.', verbose_name=b'Camp Period'),
+        ),
+        migrations.AlterField(
+            model_name='camp',
+            name='teardown',
+            field=django.contrib.postgres.fields.ranges.DateTimeRangeField(help_text=b'The camp teardown period.', verbose_name=b'Teardown period'),
+        ),
+    ]

program/migrations/0015_auto_20170128_1841.py

@@ -0,0 +1,34 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2017-01-28 17:41
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('camps', '0018_auto_20170128_1841'),
+        ('program', '0014_speaker_camp'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='eventtype',
+            name='name',
+            field=models.CharField(max_length=100, unique=True),
+        ),
+        migrations.AlterField(
+            model_name='speaker',
+            name='events',
+            field=models.ManyToManyField(blank=True, to='program.Event'),
+        ),
+        migrations.AlterUniqueTogether(
+            name='event',
+            unique_together=set([('camp', 'title'), ('camp', 'slug')]),
+        ),
+        migrations.AlterUniqueTogether(
+            name='speaker',
+            unique_together=set([('camp', 'name'), ('camp', 'slug')]),
+        ),
+    ]

program/models.py

@@ -10,7 +10,7 @@ from datetime import timedelta
 
 class EventType(CreatedUpdatedModel):
     """ Every event needs to have a type. """
-    name = models.CharField(max_length=100)
+    name = models.CharField(max_length=100, unique=True)
     slug = models.SlugField()
     color = models.CharField(max_length=50)
     light_text = models.BooleanField(default=False)
@@ -29,6 +29,7 @@ class Event(CreatedUpdatedModel):
 
     class Meta:
         ordering = ['title']
+        unique_together = (('camp', 'slug'), ('camp', 'title'))
 
     def __unicode__(self):
         return '%s (%s)' % (self.title, self.camp.title)
@@ -104,6 +105,7 @@ class Speaker(CreatedUpdatedModel):
 
     class Meta:
         ordering = ['name']
+        unique_together = (('camp', 'name'), ('camp', 'slug'))
 
     def __unicode__(self):
         return '%s (%s)' % (self.name, self.camp)

program/views.py

@@ -103,6 +103,8 @@ class EventDetailView(CampViewMixin, DetailView):
     model = models.Event
     template_name = 'program_event_detail.html'
 
+    def get_object(self):
+        return self.camp.events.get(slug=self.kwargs['slug'])
 
 class CallForSpeakersView(CampViewMixin, TemplateView):
     def get_template_names(self):