Modifies the Category model to allow for ITEM_QUANTITY forms

registrasion/migrations/0002_auto_20160822_0034.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-08-22 00:34
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('registrasion', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='category',
+            name='render_type',
+            field=models.IntegerField(choices=[(1, 'Radio button'), (2, 'Quantity boxes'), (3, 'Product selector and quantity box')], help_text='The registration form will render this category in this style.', verbose_name='Render type'),
+        ),
+    ]

registrasion/models/inventory.py

@@ -36,6 +36,12 @@ class Category(models.Model):
             where the user can specify a quantity of each Product type. This is
             useful for additional extras, like Dinner Tickets.
 
+            ``RENDER_TYPE_ITEM_QUANTITY`` shows a select menu to select a
+            Product type, and an input field, where the user can specify the
+            quantity for that Product type. This is useful for categories that
+            have a lot of options, from which the user is not going to select
+            all of the options.
+
         limit_per_user (Optional[int]): This restricts the number of items
             from this Category that each attendee may claim. This extends
             across multiple Invoices.
@@ -56,10 +62,12 @@ class Category(models.Model):
 
     RENDER_TYPE_RADIO = 1
     RENDER_TYPE_QUANTITY = 2
+    RENDER_TYPE_ITEM_QUANTITY = 3
 
     CATEGORY_RENDER_TYPES = [
         (RENDER_TYPE_RADIO, _("Radio button")),
         (RENDER_TYPE_QUANTITY, _("Quantity boxes")),
+        (RENDER_TYPE_ITEM_QUANTITY, _("Product selector and quantity box")),
     ]
 
     name = models.CharField(