title: How to return string from model method
body: <p>Using the following model, how would I return a string 'Baked fresh every day' if the BreadSchedule object had days_available equal to every day of the week?</p>
  
  <p>I want to be able to call this in my template (i.e. <code>item.is_available_daily</code>).</p>
  
  <pre><code>class Item(models.Model):
     name = models.CharField(max_length='250', help_text='Limited to 250 characters.')
  
  class BreadSchedule(models.Model):
      bread = models.ForeignKey(Item)
      days_available = models.ManyToManyField('Day')
  
      class Meta:
          verbose_name_plural = 'Bread schedules'
  
      def __unicode__(self):
          return unicode(self.bread)
  
      def is_available_daily(self):
          "Returns whether a bread is available every day of the week."
          full_week = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday']
          if self.days_available.all() == full_week:
              return 'Baked fresh every day'
  
  class Day(models.Model):
      day = models.CharField(max_length=50, help_text='Limited to 50 characters.')
  
      def __unicode__(self):
          return unicode(self.day)
  </code></pre>