[FIXED] How to get display value from Django Choices directly from the declared choice constant?

Issue

Lets say I defined a model class

from model_utils import Choices

class SomeModel(TimeStampedModel):

    food_choices = Choices(
        (1, "WATER", "Water"),
        (2, "BURGER", "Burger"),
        (3, "BIRYANI", "Biryani")
    )
    food = models.IntegerField(choices=food_choices, default=food_choices.WATER)

How do I get the display part while using the choices as a variable?

eg. SomeModel.food_choices.WATER gives me 1, how do I get the value/string "Water"?

I know if I create an instance, then I can fetch the display value using .get_food_display() for that instance, but I don’t want that I just want to use it directly from the constant created for Choices, ie food_choices.

Solution

Got it after some tinkering.

In the Choices variable, we have tuples where the respective first value is the key, eg. 1,2,3.

food_choices = Choices(
    (1, "WATER", "Water"),
    (2, "BURGER", "Burger"),
    (3, "SALAD", "Salad")
)

We know SomeModel.food_choices.WATER gives 1, ie the key.

Now to get 'Water' directly from the declared Choices constant we can get it using the declared key for that tuple:

eg. 
SomeModel.food_choices[2] # returns 'Burger'
SomeModel.food_choices[0] # throws KeyError: 0

If we don’t want to figure out what index(or magic numbers) 0 or 2 is, then use:

SomeModel.food_choices[SomeModel.food_choices.WATER] # returns 'Water'

Answered By - faruk13