[Answered ]-How to populate django admin form from model property?

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See ModelAdmin.readonly_fields (Django 1.10 docs link).

A read-only field can not only display data from a model’s field, it can also display the output of a model’s method or a method of the ModelAdmin class itself.

This means that you can do:

class ShipmentAdmin(admin.ModelAdmin):
    readonly_fields = ('price', 'something_else')

    def something_else(self, instance):
        # calculate something else here

Where price is a model method, and something_else is a ModelAdmin method.

👤nimasmi

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