title: Template code shows no results
body: <p>I want to show the values of my database in my detail template. Because of my model: </p>
  
  <pre><code>class RiskFactor(models.Model):
      patient = models.ForeignKey(Patient, on_delete=models.CASCADE)
      examination = models.CharField(max_length=100, 
                                     choices=Examination_Choice,
                                     default='notchosenyet')
      hypertension = models.BooleanField(default=False)
      diabetes = models.BooleanField(default=False)
  </code></pre>
  
  <p>I want to filter the values of the first examination and so I've design my template like this:</p>
  
  <pre><code>&lt;ul&gt;
  {% for rfac in patient.riskfactor_set.all %}
    {% if rfac.examination == 'FIRST' %}
     &lt;li&gt;Hypertension: {{ rfac.hypertension }}&lt;br/&gt;
        Diabetes: {{ rfac.diabetes }}&lt;br/&gt;
    &lt;/li&gt;
    {% endif %}
  {% endfor %}
  &lt;/ul&gt;
  </code></pre>
  
  <p>But I got no values shown in my detail page. Any ideas? </p>
  
  <p>Update: Just a dump fault of mine. Had to write 'first' instead of 'FIRST' because of my defined choices.. </p>