Example of setting a choices value for django ArrayField

example.py

# Here's your list of choices that would be displayed in a drop-down 
# element on the web.  It needs to be a tuple, and we define this
# as a variable just for readability/convenience. 
#
# This example has 3 choices, each of which consists of two parts:
# 1. the thing that get strored in your database
# 2. the thing that you see in a dropdown list
LABEL_CHOICES = (
    ('this gets stored in your database', 'This item is what you see in the drop-down'),
    ('django', 'Django'),
    ('python', 'Python'),
)

class Post(models.Model):

    # Now, when you define your ArrayField's base field (in this case a CharField),
    # you can specify the list of choices that will be precented to the user.
    # Use:  choices=LABEL_CHOICES
    labels = ArrayField(
        models.CharField(max_length=32, blank=True, choices=LABEL_CHOICES),
        default=list,
        blank=True,
    )

Great. Thanks man. This saved a ton of searches.

Could be other model objects the choices inside arrayfield?
Or maybe you filling up all the Authors.objects.all() in authors = ArrayField()?

Thank you for your sharing.

Could be other model objects the choices inside arrayfield?
Or maybe you filling up all the Authors.objects.all() in authors = ArrayField()?

@Ruslan-Skira If you wanted values from another model to be a list of choices, then it sounds like you want a relationship (e.g. a ForiegnKey or a ManyToManyField: https://docs.djangoproject.com/en/3.1/topics/db/examples/).

That'd be something like this instead:

class Post(models.Model):
    author = models.ForeignKey(Author)
    ...

I will try. Thank you.

How do you use get_foo_display() for labels field as choices is nested inside an array?
Thanks

How do you use get_foo_display() for labels field as choices is nested inside an array?

That's a great question @sauravkhakurel, and I haven't implemented this, but I think you'd need to override get_foo_display() for your model so that it returned a list of the "display" values. Continuing with the Post example from above, it might look something like this:

class Post(models.Model):

    # Now, when you define your ArrayField's base field (in this case a CharField),
    # you can specify the list of choices that will be precented to the user.
    # Use:  choices=LABEL_CHOICES
    labels = ArrayField(
        models.CharField(max_length=32, blank=True, choices=LABEL_CHOICES),
        default=list,
        blank=True,
    )

    def get_labels_display(self):
        lookup = {v: k for k, v in LABEL_CHOICES}
        return [lookup.get(v, "unknown") for v in self.labels]

How do you use get_foo_display() for labels field as choices is nested inside an array?

That's a great question @sauravkhakurel, and I haven't implemented this, but I think you'd need to override get_foo_display() for your model so that it returned a list of the "display" values. Continuing with the Post example from above, it might look something like this:

class Post(models.Model):

    # Now, when you define your ArrayField's base field (in this case a CharField),
    # you can specify the list of choices that will be precented to the user.
    # Use:  choices=LABEL_CHOICES
    labels = ArrayField(
        models.CharField(max_length=32, blank=True, choices=LABEL_CHOICES),
        default=list,
        blank=True,
    )

    def get_labels_display(self):
        lookup = {v: k for k, v in LABEL_CHOICES}
        return [lookup.get(v, "unknown") for v in self.labels]

Thanks for the answer. I got help from a colleague and did something similar to this to solve the problem that I had at hand.