Question

我正在尝试更改foreignkey-formfield的默认值，以根据登录的用户设置其他模型的值。但我正在绞尽脑汁......

这个：Changing ForeignKey’s defaults in admin site可以选择更改empty_label，但我需要default_value。

#Now I tried the following without errors but it didn't had the desired effect: class EmployeeAdmin(admin.ModelAdmin): ... def formfield_for_foreignkey(self, db_field, request=None, **kwargs): formfields= super(EmployeeAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs) if request.user.is_superuser: return formfields if db_field.name == "company": #This is the RELEVANT LINE kwargs["initial"] = request.user.default_company return db_field.formfield(**kwargs) admin.site.register(Employee, EmployeeAdmin) ################################################################## # REMAINING Setups if someone would like to know it but i think # irrelevant concerning the problem ################################################################## from django.contrib.auth.models import User, UserManager class CompanyUser(User): ... objects = UserManager() company = models.ManyToManyField(Company) default_company= models.ForeignKey(Company, related_name='default_company') #I registered the CompanyUser instead of the standard User, # thats all up and working ... class Employee(models.Model): company = models.ForeignKey(Company) ...

提示：kwargs [“default”] ......不存在。

先谢谢你，尼克

Answer 1

我认为db_field.formfield方法（也由admin btw调用）总是用模型中指定的默认值覆盖你的初始值！因此，您需要自己指定正确的表单字段：

from django import forms

class EmployeeAdmin(admin.ModelAdmin):
    def formfield_for_dbfield(self, db_field, **kwargs):
        user = kwargs['request'].user
        if db_field.name == "company":
            kwargs['initial'] = user.default_company
            qs = Company.objects.all()
            return forms.ModelChoiceField(queryset=qs, **kwargs)
        return super(EmployeeAdmin, self).formfield_for_dbfield(db_field, **kwargs)

您也可以在自定义表单的 init 中进行此自定义，但问题是，您无法正常访问表单类中的request，但您可以在此处查看我的hack { {3}}关于如何将当前用户对象放入表单中！

Answer 2

好吧，kwargs ['initial']的东西在整个过程中起作用，但是如果你给它一个对象（就像我做的那样：kwargs ['initial'] = user.default_company）它只是给了一个该死的。但它正在使用整数。

我解决了这个问题：

def formfield_for_foreignkey(self, db_field, request=None, **kwargs):
    formfields= super(EmployeeAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)

    if request.user.is_superuser:
        return formfields

    if db_field.name == "company":
        qs= request.user.company.all()
        #determine the default pos of configured default_company
        for index, item in enumerate(qs):
            if item==request.user.default_company:
                kwargs["initial"]  = index+1
                break
        #restrict shown entries in the ModelChoiceField
        kwargs["queryset"] = qs


    return db_field.formfield(**kwargs)

对不起有压力，感谢您的帮助！

django-admin formfield_for_ *根据实例更改每个/的默认值

2 个答案: