Category: Python Answers

Sometimes, we want to make email field unique in model User from contrib.auth in Python Django.

In this article, we’ll look at how to make email field unique in model User from contrib.auth in Python Django.

How to make email field unique in model User from contrib.auth in Python Django?

To make email field unique in model User from contrib.auth in Python Django, we can use the get_field method.

For instance, in models.py, we write

from django.contrib.auth.models import User

User._meta.get_field('email')._unique = True

to get the email field with User._meta.get_field('email').

And then we set its _unique property to True.

Conclusion

To make email field unique in model User from contrib.auth in Python Django, we can use the get_field method.

Sometimes, we want to convert a Python Django QuerySet to a list.

In this article, we’ll look at how to convert a Python Django QuerySet to a list.

How to convert a Python Django QuerySet to a list?

To convert a Python Django QuerySet to a list, we call list with the queryset.

For instance, we write

answers_list = list(answers)

to call list with the answers queryset to convert the results to a list.

Conclusion

To convert a Python Django QuerySet to a list, we call list with the queryset.

Sometimes, we want to get the static files URL in view with Python Django.

In this article, we’ll look at how to get the static files URL in view with Python Django.

How to get the static files URL in view with Python Django?

To get the static files URL in view with Python Django, we can use the static function.

For instance, we write

from django.templatetags.static import static

url = static('x.jpg')

to call static with the file path of the file to return the full URL of the file.

Conclusion

To get the static files URL in view with Python Django, we can use the static function.

Sometimes, we want to allow only one radio button to be checked with Python Django.

In this article, we’ll look at how to allow only one radio button to be checked with Python Django.

How to allow only one radio button to be checked with Python Django?

To allow only one radio button to be checked with Python Django, we set the radio buttons in the group to the same name.

For instance, we write

{% for each in AnswerQuery %}
    <form action={{address}}>
        <span>{{each.answer}}</span><input type='radio' name="radAnswer" >
        <span>Votes:{{each.answercount}}</span>
        <br>
    </form>
{% endfor %}

to set the name attribute of all radio buttons to radAnswer.

Then we can only select one button from the group.

Conclusion

To allow only one radio button to be checked with Python Django, we set the radio buttons in the group to the same name.

Sometimes, we want to pass additional parameters to the as_view method in a Python Django class-based view.

In this article, we’ll look at how to pass additional parameters to the as_view method in a Python Django class-based view.

How to pass additional parameters to the as_view method in a Python Django class-based view?

To pass additional parameters to the as_view method in a Python Django class-based view, we can use the slug property.

For instance, we write

from django.views.generic import DetailView

class MyView(DetailView):
    template_name = 'detail.html'
    model = MyModel
    slug = None

    def get_object(self, queryset=None):
        return queryset.get(slug=self.slug)

to create the MyView view class.

In the get_object view method, we get the slug value from self.slug.

Conclusion

To pass additional parameters to the as_view method in a Python Django class-based view, we can use the slug property.