CODEWITHSUNDEEP
djangodjango-modelsdjango-forms
S7H
S7H

Reputation: 1575

Dropdown in Django Model

I want to create a field in Django models.py which will render as a dropdown and user can select the options from there.

If I have 5 choices:

How should I write my code in models.py and Forms.py so that the template renders it like a dropdown element?

Upvotes: 64

Views: 141201

Answers (3)

f43d65
f43d65

Reputation: 2302

Specify CharField or IntegerField with choices option in your model https://docs.djangoproject.com/en/dev/ref/models/fields/#choices and use ModelForm https://docs.djangoproject.com/en/dev/topics/forms/modelforms/.

Upvotes: 27

Boketto
Boketto

Reputation: 885

An even better option in Django version 3.0 and higher:

You can use inner classes which inherit from the new models.TextChoices class. That also provides a convenient way to provide human readable (and translatable) labels, as well as a nice interface for the programmer.

Official Django documentation

from django.utils.translation import gettext_lazy as _

class Student(models.Model):

    class YearInSchool(models.TextChoices):
        FRESHMAN = 'FR', _('Freshman')
        SOPHOMORE = 'SO', _('Sophomore')
        JUNIOR = 'JR', _('Junior')
        SENIOR = 'SR', _('Senior')
        GRADUATE = 'GR', _('Graduate')

    year_in_school = models.CharField(
        max_length=2,
        choices=YearInSchool.choices,
        default=YearInSchool.FRESHMAN,
    )

    def is_upperclass(self):
        return self.year_in_school in {
            self.YearInSchool.JUNIOR,
            self.YearInSchool.SENIOR,
        }

###########
# human readable text can then be called by...
Student.YearInSchool.Junior.label

# or from an instance by <instance>.get_<innerclass name>_display() like...
student_inst.get_yearinschool_display()

Upvotes: 7

Val F.
Val F.

Reputation: 1466

From model to template :

models.py

COLOR_CHOICES = (
    ('green','GREEN'),
    ('blue', 'BLUE'),
    ('red','RED'),
    ('orange','ORANGE'),
    ('black','BLACK'),
)

class MyModel(models.Model):
  color = models.CharField(max_length=6, choices=COLOR_CHOICES, default='green')

forms.py

class MyModelForm(ModelForm):
    class Meta:
        model = MyModel
        fields = ['color']

views.py

class CreateMyModelView(CreateView):
    model = MyModel
    form_class = MyModelForm
    template_name = 'myapp/template.html'
    success_url = 'myapp/success.html'

template.html

<form action="" method="post">{% csrf_token %}
    {{ form.as_p }}
    <input type="submit" value="Create" />
</form>

or to display your select field only :

{{ form.color }}

Upvotes: 117

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