How to access attributes of the chosen page via PageChooserBlock() in StreamField template?

[kdli...@gmail.com]

Say I have the following wagtail code:

class HomePage(Page):
    body = StreamField([
        ('heading', blocks.CharBlock(classname="full")),
        ('carousel', ListBlock(
            StructBlock([
                ('image', ImageChooserBlock()),
                ('page', PageChooserBlock()),
                ('quotation', TextBlock()),
            ]), icon='cogs', template='shop/blocks/carousel.html')),
    ])

And in the editing interface I chose a page via `PageChooserBlock()`, Let's say the chosen page is defined as below:

class ItemPage(Page):
    intro = models.CharField(max_length=255)
    body = RichTextField()

So how to access this page's attributes in the `shop/blocks/carousel.html` template?

what I want is like this:

{% for item in self %}
  <a href="{{ item.page.url }}">
      {% image item.image width-400 %}
      {{ item.quotation }}
      {{ item.page.intro }}
      {{ item.page.body }}
  </a>
{% endfor %}

`{{ item.page.url }}`, {{ item.quotation }} and {{ item.image }} work, but `{{ item.page.intro }}` and `{{ item.page.body }}` don't work.

I must be using StreamField in the wrong way, I think.

[Matthew Westcott]

This is failing because the PageChooserBlock only returns a plain Page instance, which doesn't include the additional intro/body fields from ItemPage. You can convert the Page instance to an instance of ItemPage (at the cost of an extra database query) by accessing {{ item.page.specific }}.

(It's on our todo list to support something like PageChooserBlock(page_type=ItemPage), which would return the ItemPage, and also ensure that editors can only choose ItemPages in the page chooser.)

Cheers,
- Matt

[kdli...@gmail.com]

Thank you so much Matt. I'm very looking forward to the PageChooserBlock(page_type=ItemPage) feature! Thank you again.

在 2015年6月5日星期五 UTC+8下午5:00:13，Matthew Westcott写道：