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我不知道爲什麼這會導致我這樣的問題,但我似乎無法弄清楚。我在我們的Mezzanine/Cartridge產品數據庫中獲得了CSV和PDF導出產品。它連續導出每個ProductVariation。很好的工作,但我需要添加一個過濾器,例如只導出已發佈的產品。 ProductVariations有一個外鍵關係到產品型號:在父類上通過布爾字段過濾queryset
class ProductVariation(Priced):
"""
A combination of selected options from
``SHOP_OPTION_TYPE_CHOICES`` for a ``Product`` instance.
"""
product = models.ForeignKey("Product", related_name="variations")
產品型號子類可顯示:
class Product(Displayable, Priced, RichText, AdminThumbMixin):
"""
Container model for a product that stores information common to
all of its variations such as the product's title and description.
"""
Displayable類是用來判斷產品是否顯示普通用戶或僅工作人員:
CONTENT_STATUS_DRAFT = 1
CONTENT_STATUS_PUBLISHED = 2
CONTENT_STATUS_COMPLETE = 3
CONTENT_STATUS_INACTIVE = 4
CONTENT_STATUS_CHOICES = (
(CONTENT_STATUS_DRAFT, _("Draft")),
(CONTENT_STATUS_PUBLISHED, _("Online")),
(CONTENT_STATUS_COMPLETE, _("Complete")),
(CONTENT_STATUS_INACTIVE, _("Inactive")),
)
class Displayable(Slugged, MetaData, TimeStamped):
"""
Abstract model that provides features of a visible page on the
website such as publishing fields. Basis of Mezzanine pages,
blog posts, and Cartridge products.
"""
status = models.IntegerField(_("Status"),
choices=CONTENT_STATUS_CHOICES, default=CONTENT_STATUS_DRAFT,
help_text=_("The General public can only view content that has ONLINE status."))
在嘗試按狀態過濾結果,但我似乎無法讓它按我期望的方式工作。在我的報告視圖我將添加像這樣:
product_variations = ProductVariation.objects.filter('product__status' == 'CONTENT_STATUS_PUBLISHED')
,但它只是給了我一個錯誤,「‘布爾’對象不是可迭代」。我究竟做錯了什麼?
也就是說完全正確!當我正確訪問它時,它正常工作,它正在查看分配的整數字段,因此一旦我將其更改爲(product__status ='2'),它就會正確過濾。謝謝! – Neum