title: Django field error messages
body: <p>I have fields in a django form that require an integer.
  the default value in the field is '-'.
  This means that when a user ignores the field, an form field error is returned.
  Annoyingly the message has an annoying 'u' in it. </p>
  
  <p>How do I get rid of the U?</p>
  
  <p>the html</p>
  
  <pre><code>&lt;div class="col-sm-1"&gt;
     {% with childForm.age as field %}
        &lt;div class="form-group{% if field.errors %} has-error{% endif %}" id="children-age"&gt;
            {{ field }}
            {% if field.errors %}&lt;p class="help-block"&gt;{% for error in field.errors %}{{ error }}{% endfor %}&lt;/p&gt;{% endif %}
         &lt;/div&gt;
      {% endwith %}
   &lt;/div&gt;
  </code></pre>
  
  <p>the error</p>
  
  <p><img src="https://i.stack.imgur.com/AtTg7.png" alt="screenshot of the error"></p>
  
  <p>forms.py</p>
  
  <pre><code>class TravelGeneralEnquiryForm(forms.ModelForm):
  children = forms.ChoiceField(choices=(('','-'),) + tuple(((str(x), x) for x in range(0, 11))), required=True)
  adults = forms.ChoiceField(choices=(('','-'),) + tuple(((str(x), x) for x in range(1, 11))), required=True)
  pets = forms.ChoiceField(choices=((str(x), x) for x in range(0, 11)), required=True, initial=1)
  budget = forms.ChoiceField(choices=BUDGET,required=False)
  interest_destination = forms.MultipleChoiceField(required=False,
                                              widget=forms.CheckboxSelectMultiple,
                                              choices=INTEREST_DESTINATION_CHOICES)
  interest_accommodation = forms.MultipleChoiceField(required=False,
                                              widget=forms.CheckboxSelectMultiple,
                                              choices=INTEREST_ACCOMMODATION_CHOICES)
  contact_preference = forms.ChoiceField(required=False,
                                              widget=forms.RadioSelect,
                                              choices=CONTACT_PREFERENCE)
  inspire_hours = forms.ChoiceField(choices=INSPIRE_HOURS, required=False)
  
  def __init__(self, *args, **kwargs):
      super(TravelGeneralEnquiryForm, self).__init__(*args, **kwargs)
      self.fields['name_title'].widget.attrs = {'class': 'form-control',}
      self.fields['name_title'].label = 'Title*'
      self.fields['first_name'].widget.attrs = {'class': 'form-control',}
      self.fields['first_name'].label = 'First name*'
      self.fields['last_name'].widget.attrs = {'class': 'form-control',}
      self.fields['last_name'].label = 'Last name*'
      self.fields['email'].widget.attrs = {'class': 'form-control',}
      self.fields['email'].label = 'Email address*'
      self.fields['telephone'].widget.attrs = {'class': 'form-control',}
      self.fields['telephone'].label = 'Telephone number*'
      self.fields['check_in_date'].widget.attrs = {'class': 'form-control datepicker', 'data-date-format': 'dd/mm/yyyy', 'placeholder': 'dd/mm/yyyy', 'autocomplete': 'off',}
      self.fields['check_in_date'].widget.format = '%d/%m/%Y'
      self.fields['check_in_date'].input_formats = ['%d/%m/%Y']
      self.fields['check_in_date'].label = 'Check in date*'
      self.fields['check_out_date'].widget.attrs = {'class': 'form-control datepicker', 'data-date-format': 'dd/mm/yyyy', 'placeholder': 'dd/mm/yyyy', 'autocomplete': 'off',}
      self.fields['check_out_date'].widget.format = '%d/%m/%Y'
      self.fields['check_out_date'].input_formats = ['%d/%m/%Y']
      self.fields['check_out_date'].label = 'Check out date*'
      self.fields['budget'].widget.attrs = {'class': 'form-control'}
      self.fields['info'].widget.attrs = {'class': 'form-control', 'rows': '3', 'placeholder': 'Pet breed/size/temperament/food allergies/disabled access'}
      self.fields['adults'].widget.attrs = {'class': 'form-control'}
      self.fields['adults'].label = 'Number of adults*'
      self.fields['children'].widget.attrs = {'class': 'form-control', 'initial': '---'}
      self.fields['children'].label = 'Number of children*'
      self.fields['pets'].widget.attrs = {'class': 'form-control'}
      self.fields['pets'].label = 'Number of pets*'
      self.fields['rooms'].widget.attrs = {'class': 'form-control'}
      self.fields['rooms'].label = 'Number of rooms*'
      self.fields['contact_preference'].label = 'Prefered method of contact'
      self.fields['inspire_postcode'].label = 'Your Postcode'
      self.fields['inspire_postcode'].widget.attrs = {'class': 'form-control', 'placeholder': 'N1 4SZ'}
      self.fields['inspire_hours'].label = 'How far would you like to travel?'
      self.fields['inspire_hours'].widget.attrs = {'class': 'form-control'}
      self.fields['inspire_details'].widget.attrs = {'class': 'form-control', 'rows': '2', 'cols':50 , 'placeholder': 'The more information you give us, the better we are able to help you!'}
      self.fields['inspire_details'].label = 'Additional Information'
  
  
  class Meta:
      model =  TravelGeneralEnquiry
      exclude = ('enquiry_source',)
  
  class TravelGeneralEnquiryChildForm(forms.ModelForm):
      age = forms.ChoiceField(choices=(('-','-'),) + tuple(((str(x), x) for x in range(0, 18))))
  
  def __init__(self, *args, **kwargs):
      super(TravelGeneralEnquiryChildForm, self).__init__(*args, **kwargs)
      self.fields['age'].widget.attrs = {'class': 'form-control'}
  
  class Meta:
      model =  TravelGeneralEnquiryChild
      fields = ('age',)
  
  
  class TravelGeneralEnquiryChild(models.Model):
      general_enquiry = models.ForeignKey(TravelGeneralEnquiry, blank=False, null=False, related_name="general_enquiry_children")
      age = models.CharField(max_length=2, default=0, null=False, blank=False, choices=((str(x), x) for x in range(0, 18)))
  </code></pre>