Showing custom error messages in django model form with bootstrap - django

Question

I want to show custom error messages, if some field is not valid. I have following model:
class Test(models.Model):
name = models.IntegerField(max_length=10)
class TestForm(forms.ModelForm):
class Meta:
model = Test
fields = '__all__'
error_messages = {
'name': {
'max_length': ("This user's name is too long."),
},
}
The view is:
def test(request):
if request.method == 'POST':
print "The form is submitted successfully."
form = TestForm(request.POST)
if form.is_valid():
print request.POST.get("name")
return render(request, 'test.html',{'form' : TestForm()})
else:
print "Something wrong with inputs."
return render(request, 'test.html',{'form' : form})
else:
return render(request,'test.html',{'form' : TestForm()})
and template is:
{% extends "base.html" %}
{% block title %}
Test Form
{% endblock title %}
{% load widget_tweaks %}
{% block body_block %}
<h1>hello from test</h1>
<form class='form-horizontal' role='form' action="." method="POST">
<div class='form-group'>
<label class='control-label col-md-2 col-md-offset-2' for='id_name'>Name</label>
<div class='col-md-6'>
{% render_field form.name class="form-control" placeholder="Full Name" type="text" %}
{{ form.name.error_messages }}
{# I want to add here classes for alert-error etc #}
</div>
</div>
{% csrf_token %}
<div class='form-group'>
<div class='col-md-offset-4 col-md-6'>
<button type="submit" class="btn btn-success">Submit</button>
</div>
</div>
</form>
{% endblock body_block %}
But, I am not getting any messages in the template. Please help me to solve this.

Answer 1

Change form.name.error_messages to form.name.errors in your template.
It seems you render fields/errors one by one manually, explained here:
You may want to consider a more automatic approach using a {% for %} template tag.
EDIT: To change the default error message, you need to update your error_messages in the form Meta and overwrite the key used by django, in this case it is key invalid, based on IntegerField source:
class Meta:
model = Test
fields = '__all__'
error_messages = {
'some_integer_field': {
'invalid': 'some custom invalid message',
},
}