django - 在管理员中将动态字段添加到 Django 的 export_as_csv 操作

Question

我正在尝试自定义出现在管理菜单中的 export_as_csv 操作，以便我可以将动态字段添加到导出的 CSV 文件中。这是通过使用 django-adminactions它提供了 Export as CSV行动。到目前为止，我有以下内容:

from django.contrib import admin
from adminactions.api import csv_options_default, export_as_csv as _export_as_csv
from myapp.models import MyModel

class MyModelAdmin(admin.ModelAdmin):    
    list_display = ('field1', 'field2', 'field3')

    qs = MyModel.objects.all()
    options = csv_options_default
    fields = ['field4', 'field5']
    header = ['Header4', 'Header5']
    actions = [_export_as_csv(queryset=qs, fields=fields, header=header, options=options)]

admin.site.register(MyModel, MyModelAdmin)

但是上面的代码在页面上产生如下错误:

hasattr(): attribute name must be string
    Request Method: GET
    Request URL:    http://localhost:8000/admin/mymodel/mymodel/
    Django Version: 1.4.14
    Exception Type: TypeError
    Exception Value:    
    hasattr(): attribute name must be string
    Exception Location: /home/me/.virtualenvs/myproj/local/lib/python2.7/site-packages/django/contrib/admin/options.py in get_action, line 648
    Python Executable:  /home/me/.virtualenvs/myproj/bin/python
    Python Version: 2.7.6

我这样做的方式正确吗？如何将动态字段添加到管理员中 Django 的 export_as_csv 函数？

Answer 1

这是我不久前做的:

https://djangosnippets.org/snippets/2995/

可以这样使用:

class ExampleModelAdmin(admin.ModelAdmin):
    raw_id_fields = ('field1',)
    list_display = ('field1', 'field2', 'field3',)
    actions = [download_as_csv("Export Special Report"),]  # custom label for action
    download_as_csv_fields = [
        'field1',  # will use Django field verbose_name as col name
        ('foreign_key1__foreign_key2__name', 'label2'),  # traverse relations with __ syntax
        ('field3', 'label3'),  # custom col name
    ],
    download_as_csv_header = True  # output a header row in the csv