Adds db indices

registrasion/migrations/0012_auto_20160406_1212.py

@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-04-06 12:12
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('registrasion', '0011_auto_20160401_0943'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='cart',
+            name='active',
+            field=models.BooleanField(db_index=True, default=True),
+        ),
+        migrations.AlterField(
+            model_name='cart',
+            name='released',
+            field=models.BooleanField(db_index=True, default=False),
+        ),
+        migrations.AlterField(
+            model_name='cart',
+            name='time_last_updated',
+            field=models.DateTimeField(db_index=True),
+        ),
+        migrations.AlterField(
+            model_name='category',
+            name='order',
+            field=models.PositiveIntegerField(db_index=True, verbose_name='Display order'),
+        ),
+        migrations.AlterField(
+            model_name='product',
+            name='order',
+            field=models.PositiveIntegerField(db_index=True, verbose_name='Display order'),
+        ),
+        migrations.AlterField(
+            model_name='productitem',
+            name='quantity',
+            field=models.PositiveIntegerField(db_index=True),
+        ),
+        migrations.AlterIndexTogether(
+            name='cart',
+            index_together=set([('active', 'released'), ('released', 'user'), ('active', 'user'), ('active', 'time_last_updated')]),
+        ),
+    ]

registrasion/models.py

@@ -99,6 +99,7 @@ class Category(models.Model):
     )
     order = models.PositiveIntegerField(
         verbose_name=("Display order"),
+        db_index=True,
     )
     render_type = models.IntegerField(
         choices=CATEGORY_RENDER_TYPES,
@@ -147,6 +148,7 @@ class Product(models.Model):
     )
     order = models.PositiveIntegerField(
         verbose_name=("Display order"),
+        db_index=True,
     )
 
 
@@ -313,6 +315,7 @@ class VoucherDiscount(DiscountBase):
         Voucher,
         on_delete=models.CASCADE,
         verbose_name=_("Voucher"),
+        db_index=True,
     )
 
 
@@ -458,17 +461,33 @@ class Cart(models.Model):
     ''' Represents a set of product items that have been purchased, or are
     pending purchase. '''
 
+    class Meta:
+        index_together = [
+            ("active", "time_last_updated"),
+            ("active", "released"),
+            ("active", "user"),
+            ("released", "user"),
+        ]
+
     def __str__(self):
         return "%d rev #%d" % (self.id, self.revision)
 
     user = models.ForeignKey(User)
     # ProductItems (foreign key)
     vouchers = models.ManyToManyField(Voucher, blank=True)
-    time_last_updated = models.DateTimeField()
+    time_last_updated = models.DateTimeField(
+        db_index=True,
+    )
     reservation_duration = models.DurationField()
     revision = models.PositiveIntegerField(default=1)
-    active = models.BooleanField(default=True)
+    active = models.BooleanField(
-    released = models.BooleanField(default=False)  # Refunds etc
+        default=True,
+        db_index=True,
+    )
+    released = models.BooleanField(
+        default=False,
+        db_index=True
+    )  # Refunds etc
 
     @classmethod
     def reserved_carts(cls):
@@ -492,7 +511,7 @@ class ProductItem(models.Model):
 
     cart = models.ForeignKey(Cart)
     product = models.ForeignKey(Product)
-    quantity = models.PositiveIntegerField()
+    quantity = models.PositiveIntegerField(db_index=True)
 
 
 @python_2_unicode_compatible