old_contents: from django.db import models
  from cms.models import CMSPlugin
  from django.utils.translation import ugettext_lazy as _
  
  
  class Update(models.Model):
      """
      Defines a date on which updates were made.
      """
      date = models.DateField(_('Update Date'))
  
      def __str__(self):
          return str(self.date)
  
      class Meta:
          verbose_name = 'update'
          verbose_name_plural = 'updates'
          app_label = 'updates'
  
  
  class UpdateItem(models.Model):
      """
      Defines one or many items that were updated on a single date.
      """
      update = models.ForeignKey(Update)
      item = models.CharField(_('Update Item'), max_length=256)
      description = models.TextField(
          _('Item Description (Optional)'),
          help_text="This field is optional and should only be used when the description is too long for the sidebar plugin.",
          null=True,
          blank=True
      )
  
      def __str__(self):
          return self.item
  
      class Meta:
          verbose_name = 'updateitem'
          verbose_name_plural = 'updateitems'
          app_label = 'updates'
  
  
  class UpdatesPlugin(CMSPlugin):
      NUMBER_CHOICES = (
          (5, 5),
          (10, 10),
          (25, 25),
          (100, 100),
      )
      number_to_show = models.IntegerField(
          max_length=10, choices=NUMBER_CHOICES)
  
new_contents: from django.db import models
  from cms.models import CMSPlugin
  from django.utils.translation import ugettext_lazy as _
  
  
  class Update(models.Model):
      """
      Defines a date on which updates were made.
      """
      date = models.DateField(_('Update Date'))
  
      def __str__(self):
          return str(self.date)
  
      class Meta:
          verbose_name = 'update'
          verbose_name_plural = 'updates'
          app_label = 'updates'
  
  
  class UpdateItem(models.Model):
      """
      Defines one or many items that were updated on a single date.
      """
      update = models.ForeignKey(Update)
      item = models.CharField(_('Update Item'), max_length=256)
      description = models.TextField(
          _('Item Description (Optional)'),
          help_text="This field is optional and should only be used when the description is too long for the sidebar plugin.",
          null=True,
          blank=True
      )
  
      def __str__(self):
          return self.item
  
      class Meta:
          verbose_name = 'updateitem'
          verbose_name_plural = 'updateitems'
          app_label = 'updates'
  
  
  class UpdatesPlugin(CMSPlugin):
      number_to_show = models.IntegerField(
          max_length=10,)
  
  
subject: Remove choices for any number of updates.