如何集成 Django Import Export 和 Wagtail？

Question

我正在尝试将 django-import-export 中的模型资源添加到 Wagtail 的管理员中。我能找到的唯一文档说你会通过钩子来做。问题是，我不断收到错误消息：

missing 2 required positional arguments: 'model' and 'admin_site'

整个resource 和ModelAdmin 是：

class AccountResource(resources.ModelResource):

    class Meta:
        model = Account
        fields = ('first_name', 'last_name', 'email', 'created', 'archived')

class AccountsAdmin(ImportExportModelAdmin, ModelAdmin):
    resource_class = AccountResource
    model = Account
    menu_label = 'Accounts'  # ditch this to use verbose_name_plural from model
    menu_icon = 'group'  # change as required
    menu_order = 200  # will put in 3rd place (000 being 1st, 100 2nd)
    add_to_settings_menu = False  # or True to add your model to the Settings sub-menu
    exclude_from_explorer = False # or True to exclude pages of this type from Wagtail's explorer view
    list_display = ('first_name', 'last_name', 'email', 'created', 'archived')
    search_fields = ('first_name', 'last_name', 'email', 'created')

# Now you just need to register your customised ModelAdmin class with Wagtail
modeladmin_register(AccountsAdmin)

有什么建议吗？

Answer 1

Wagtail ModelAdmin 不共享 Django ModelAdmin 的 API。

来自 django-import-export 的 mixin 预计将与 Django ModelAdmin 一起使用，并且不会与 Wagtail ModelAdmin 一起使用，因为您已经亲身体验过。

对于导出功能，我通过将 Django ModelAdmin 的 export_action 与 ExportMixin 挂钩到 Wagtail ModelAdmin 的 URL 中解决了这个问题。

这可能不太漂亮，但允许重用 ExportMixin 中的视图和逻辑。

我已经发布了一个example Project on GitHub，它利用了这种设计。

here 可以找到的实际胶水代码并没有那么多：

from django.conf.urls import url
from django.contrib.admin import ModelAdmin as DjangoModelAdmin
from django.core.exceptions import ImproperlyConfigured
from django.utils.http import urlencode
from django.utils.translation import gettext_lazy as _
from import_export.admin import ExportMixin
from wagtail.contrib.modeladmin.helpers import ButtonHelper


class ExporterDummySite:
    name = None

    def each_context(self, request):
        return {}


class WMAExporter(ExportMixin, DjangoModelAdmin):
    export_template_name = 'wma_export/export.html'

    def __init__(self, wagtail_model_admin):
        self.wagtail_model_admin = wagtail_model_admin
        super().__init__(wagtail_model_admin.model, ExporterDummySite())

    def get_export_queryset(self, request):
        index_view = self.wagtail_model_admin.index_view_class(
            model_admin=self.wagtail_model_admin
        )
        index_view.dispatch(request)
        return index_view.get_queryset(request)


class ExportButtonHelper(ButtonHelper):
    export_button_classnames = ['bicolor', 'icon', 'icon-download']

    def export_button(self, classnames_add=None, classnames_exclude=None):
        if classnames_add is None:
            classnames_add = []
        if classnames_exclude is None:
            classnames_exclude = []
        classnames = self.export_button_classnames + classnames_add
        cn = self.finalise_classname(classnames, classnames_exclude)
        return {
            'url': self.url_helper.get_action_url("export") + '?' + urlencode(self.view.params),
            'label': _('Export'),
            'classname': cn,
            'title': _('Export these %s') % self.verbose_name_plural,
        }


class WMAExportMixin:
    button_helper_class = ExportButtonHelper
    exporter_class = None

    def get_admin_urls_for_registration(self):
        return super().get_admin_urls_for_registration() + (
            url(self.url_helper._get_action_url_pattern("export"),
                self.export_view,
                name=self.url_helper.get_action_url_name("export")),
        )

    def export_view(self, request):
        if self.exporter_class is None:
            raise ImproperlyConfigured(f"{self.__class__.__name__}.exporter_class not set!")
        exporter = self.exporter_class(self)
        return exporter.export_action(request)

我认为可以做类似的事情来实现导入部分。