title: How to override the default value in dropdown list
body: <p>In my web application, i have a drop-down list created using ModelForm which is rendering well, however, i can't set default text like "Choose One Option" or "Select One", rather its showing the default "----" which I would love to override</p>
  
  <p>I have tried using forms.ChoiceField in my widgets but its still not making any difference</p>
  
  <pre><code>from django import forms
  from . import models
  from .models import FacultyData
  </code></pre>
  
  <p>class DepartmentCreationForm(forms.ModelForm):</p>
  
  <pre><code>class Meta:
      model = models.DepartmentData
      fields = ['fid', 'dept_name']
  
      data = []
      #data.append((None, 'select one'))
      data.append(('20', "---Choose One---"))
      CHOICES = FacultyData.objects.all()
  
      for v in CHOICES:
          # fname = "%s -- $%d each" % (v.faculty_name, v.created_on)
          data.append((v.id, v.faculty_name))
  widgets = {
          'fid': forms.Select(attrs={'class': 'form-control'}),
          'dept_name': forms.TextInput(attrs={'class': 'form-control', 'placeholder': 'Enter Department Name'})
     }
  </code></pre>
  
  <p>I expect the default output to be "Select One" but the actual output is "-----"</p>