Django 计算字段上的自定义ModelAdmin筛选器
我试图模仿的示例: 位于/admin/gallery/galleryitem的字段错误/ 无法将关键字“on_sale”解析为字段 选项包括:内容类型、内容类型、id、深度、描述、直销、直销、额外描述、直销价格、草稿标题、过期、外部链接、首次发布的位置、表单提交、图库图像、上线的位置、组权限、有无未发布的更改、id、索引条目、最后发布的位置、,最新版本创建、实时、实时、实时版本、实时版本id、锁定、锁定、锁定、锁定、锁定id、numchild、所有者、所有者id、页面ptr、页面ptr、页面ptr id、路径、重定向、修订、搜索描述、搜索引擎优化标题、在菜单中显示、网站根目录、slug、股票、标题、url路径、视图限制、工作流状态、工作流页面 models.pyDjango 计算字段上的自定义ModelAdmin筛选器,django,wagtail,modeladmin,Django,Wagtail,Modeladmin,我试图模仿的示例: 位于/admin/gallery/galleryitem的字段错误/ 无法将关键字“on_sale”解析为字段 选项包括:内容类型、内容类型、id、深度、描述、直销、直销、额外描述、直销价格、草稿标题、过期、外部链接、首次发布的位置、表单提交、图库图像、上线的位置、组权限、有无未发布的更改、id、索引条目、最后发布的位置、,最新版本创建、实时、实时、实时版本、实时版本id、锁定、锁定、锁定、锁定、锁定id、numchild、所有者、所有者id、页面ptr、页面ptr、页面p
class GalleryItem(Page):
parent_page_types = ['InstallationPage']
description = models.CharField(blank=True, max_length=250)
direct_sale = models.BooleanField("On Sale", default=False, help_text="Check this box to list this item for sale directly on your website.")
direct_sale_price = models.DecimalField("Sale price, $", blank=True, null=True, max_digits=6, decimal_places=2, help_text="Add more info about this item for the store page only.")
direct_sale_extra_description = models.CharField("Addtional sale description (optional)", blank=True, max_length=250, )
stock = models.IntegerField("Number in stock", blank=True, null=True,)
def external_sale(self):
return bool(self.external_links.count())
def on_sale(self, obj):
return obj.external_sale or obj.direct_sale
class ExternalLink(Orderable):
gallery_item = ParentalKey(GalleryItem, on_delete=models.CASCADE, related_name='external_links', help_text="Add details about the listing, ex. dimensions, framing.")
description = models.CharField(blank=True, max_length=250)
external_sale_url = models.URLField(blank=True, help_text="Add an external link to sell this.")
摇尾钩
class OnSaleFilter(SimpleListFilter):
title = 'On Sale'
parameter_name = 'on_sale'
def lookups(self, request, model_admin):
return (
('Yes', 'Yes'),
('No', 'No'),
)
def queryset(self, request, queryset):
value = self.value()
if value == 'Yes':
return queryset.filter(on_sale=True)
elif value == 'No':
return queryset.filter(on_sale=False)
return queryset
class GalleryItemAdmin(ThumbnailMixin, ModelAdmin):
model = GalleryItem
menu_label = 'All Gallery Items' # ditch this to use verbose_name_plural from model
menu_icon = 'pick' # 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 = ('title', 'admin_thumb', 'description', 'direct_sale', 'external_sale')
list_filter = (OnSaleFilter, InstallationFilter,)
list_per_page = 50
search_fields = ('title', 'description')
thumb_image_field_name = 'main_image'
thumb_image_width = 100
只需将计算添加到查询集中。 例如新闻>状态:
#_____________________________________________________________________________
class NewsItem(models.Model):
objects = NewsItemQuerySet.as_manager()
#_____________________________________________________________________________
class NewsItemQuerySet(models.query.QuerySet):
def with_status_key(self):
now = timezone.now()
queryset = self.select_related('parent')
queryset = queryset.annotate(
status_key = Case(
When(go_live_at__gt=now, then=Value(0)), # pending
When(go_live_at__lte=now, expire_at__gte=now, then=Value(1)), # running
default=Value(2), # archived
output_field=IntegerField(),
)
).order_by('status_key', 'go_live_at', 'expire_at')
return queryset
或者可能:
from wagtail.core.models import PageManager
#_____________________________________________________________________________
class MyManager(PageManager):
def get_queryset(self):
return super().get_queryset()
def with_status_key(self):
queryset = self. get_queryset().select_related('parent')
etc