CODEWITHSUNDEEP
djangoenumsdjango-adminmodels
vvoody
vvoody

Reputation: 166

Django admin panel can not set valid choice when choices are enum.Enum

I use enum.Enum as choices for field language.

I can create a book by b = Book(title="Some Title", language=LanguageChoice.EN).

And query by books = Book.objects.filter(languge=LanguageChoice.EN).

However, when I want to create new books at admin panel, it says Select a valid choice. LanguageChoice.EN is not one of the available choices..

Django has ability to serialize enum.Enum since 1.10. So how should admin panel work? Thanks. 

from enum import Enum
from django.db import models


class LanguageChoice(Enum):
    DE = "German"
    EN = "English"
    CN = "Chinese"
    ES = "Spanish"


class Book(models.Model):
    title = models.CharField(max_length=255)
    language = models.CharField(
        max_length=5,
        choices=[(tag, tag.value) for tag in LanguageChoice]  
    )

Upvotes: 6

Views: 2599

Answers (3)

Dalvtor
Dalvtor

Reputation: 3286

I just had this problem. Rewrite your Book model as the following, and notice the change in the choices line.

class Book(models.Model):
    title = models.CharField(max_length=255)
    language = models.CharField(
        max_length=5,
        choices=[(tag.name, tag.value) for tag in LanguageChoice]  
    )

Upvotes: 4

Ilhame Qaflanova
Ilhame Qaflanova

Reputation: 9

I changed (tag,tag.value) to (tag.value,tag) and it worked.

Upvotes: -4

jrief
jrief

Reputation: 1695

You should rewrite your Django model as

class LanguageChoice(Enum):
    DE = "German"
    EN = "English"
    CN = "Chinese"
    ES = "Spanish"

    @classmethod
    def all(self):
        return [LanguageChoice.DE, LanguageChoice.EN, LanguageChoice.CN, LanguageChoice.ES]


class Book(models.Model):
    title = models.CharField(max_length=255)
    language = models.CharField(
        max_length=5,
        choices=[(tag.value, tag.name) for tag in LanguageChoice.all()]  
    )

Upvotes: 2

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