title: Django - how to set blank = False, required = False
body: <p>I've a model like this:</p>
  
  <pre><code>class Message(models.Model):
      msg = models.CharField(max_length = 150)
  </code></pre>
  
  <p>and I have a form for insert the field. Actually django allows empty spaces, for examples if I inset in the field one space it works. But now I want to fix this: the field is not required, but if a user insert a spaces, the validation should fail.</p>
  
  <p>I've added:</p>
  
  <pre><code>class Message(models.Model):
      msg = models.CharField(max_length = 150, blank = False)
  </code></pre>
  
  <p>but it doesn't work.
  What's the mistake?</p>