django-admin formfield_for_ *根据实例更改默认值 [英] django-admin formfield_for_* change default value per/depending on instance

问题描述

我试图更改外键表单字段的默认值，以根据登录的用户设置其他模型的值。 em>。
但是我正在为此绞尽脑汁...

I'm trying to change the default value of a foreignkey-formfield to set a Value of an other model depending on the logged in user. But I'm racking my brain on it...

这是：在管理站点中更改ForeignKey的默认值将是更改empty_label的选项，但我需要default_value。

This: Changing ForeignKey’s defaults in admin site would an option to change the empty_label, but I need the 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。

Hint: kwargs["default"] ... doesn't exist.

谢谢，尼克

推荐答案

好吧，kwargs ['initial']东西一直都起作用，但是如果给它一个对象，它只会给人一种诅咒（里ke我做了以下操作：kwargs ['initial'] = user.default_company）。

ok, the kwargs['initial'] thing worked the whole time but it just give a damn if you give it an object (like I did with: kwargs['initial'] = user.default_company). But it's working with an Integer.

我是这样解决的：

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)

抱歉，压力很大，感谢您的帮助！

Sorry for the stress and thanks for helping!

这篇关于django-admin formfield_for_ *根据实例更改默认值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！