如何在django admin更改另一个值时动态更改条目的值

这里，当管理员更改“is_valid”时，我想将另一个整数字段的值减1

，因为您只想从

ModelAdmin

添加一些预保存操作，您应该重写

save_model

方法，减小所述值，并触发

model.save（）

方法：

from django.contrib import admin
from .models import Order

class OrderAdmin(admin.ModelAdmin):
    list_display = ('id', 'name', 'product', 'email','is_valid','is_delivered', 'order_date')
    list_display_links = ('id', 'name',)
    list_editable = ('is_valid','is_delivered')
    search_fields = ('name', 'email', 'product')
    list_per_page = 25

admin.site.register(Order, OrderAdmin)

---

仅从管理界面？或者由

is_superuser

user从任何界面？仅由任何员工从管理界面

from django.contrib import admin

class OrderAdmin(admin.ModelAdmin):
    list_display = ('id', 'name', 'product', 'email','is_valid','is_delivered', 'order_date')
    list_display_links = ('id', 'name',)
    list_editable = ('is_valid','is_delivered')
    search_fields = ('name', 'email', 'product')
    list_per_page = 25

    def save_model(self, request, obj, form, change):
        # decrement logic here and then trigger save as below
        # you have access to the model through obj and form data through form
        # e.g.: obj.is_valid and form.changed_data are here
        super().save_model(request, obj, form, change)

admin.site.register(Order, OrderAdmin)