问题描述
我有一个抽象类,其中有一个StreamField。我还有一个CustomPage类继承自BasePage。我希望CustomPage向内容添加一个新的StructBlock。我如何做? class BasePage(页):
content = StreamField([
'ad',...),
('text',...),
('img',...),
])
content_panels = Page .content_panels + [
StreamFieldPanel('content')
]
class Meta:
abstract = True
class CustomPage(BasePage ):
#add('custom_block',...)到内容流域。
StreamField定义不能直接扩展以这种方式,但是有一点重新洗牌,您可以定义一个重新使用相同阻止列表的新StreamField:
COMMON_BLOCKS = [
('ad',...),
('text',...),
('img',...),
]
class BasePage(页):
content = StreamField(COMMON_BLOCKS)
...
class CustomPage(BasePage):
content = StreamField(COMMON_BLOCKS + [
('custom_block',...),
])
或者在StreamBlock上使用继承(你可能认为它比连接列表有点整洁:
class CommonStreamBlock StreamBlock)
ad = ...
text = ...
img = ...
class CustomStreamBlock(CommonStreamBlock):
custom_block = ...
class BasePage(页):
content = St reamField(CommonStreamBlock())
...
class CustomPage(BasePage):
content = StreamField(CustomStreamBlock())
另外请注意,这是 - 旧版本的Django不允许覆盖抽象超类的字段。
I have a abstract class that have ha StreamField in it. I also have a class CustomPage that inherits from BasePage. I want CustomPage to add a new StructBlock to content. How do i do that?
class BasePage(Page):
content = StreamField([
('ad', ...),
('text', ...),
('img', ...),
])
content_panels = Page.content_panels + [
StreamFieldPanel('content'),
]
class Meta:
abstract = True
class CustomPage(BasePage):
# add ('custom_block', ...) to content streamfield.
The StreamField definition can't be 'extended' directly in this way, but with a bit of re-shuffling you can define a new StreamField that re-uses the same block list:
COMMON_BLOCKS = [
('ad', ...),
('text', ...),
('img', ...),
]
class BasePage(Page):
content = StreamField(COMMON_BLOCKS)
...
class CustomPage(BasePage):
content = StreamField(COMMON_BLOCKS + [
('custom_block', ...),
])
Or using inheritance on StreamBlock (which you might consider a bit neater than concatenating lists:
class CommonStreamBlock(StreamBlock):
ad = ...
text = ...
img = ...
class CustomStreamBlock(CommonStreamBlock):
custom_block = ...
class BasePage(Page):
content = StreamField(CommonStreamBlock())
...
class CustomPage(BasePage):
content = StreamField(CustomStreamBlock())
Also, note that this is only possible since Django 1.10 - older versions of Django don't allow overriding fields of an abstract superclass.
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