Field for single (Struct)block

[Roel Obdam]

The code below works, but I would like to have a two panels in the wagtail admin on this page for the two block (left and right).

In the docs it says you can only feed StreamBlock to StreamField, but is there a way to to have a field for a single block instance? Or should I use separate fields on the page instead of blocks?

When I try the generic FieldPanel as a panel i get 'StreamValue' object has no attribute 'get' (struct_block.py:line 78)

from wagtail.wagtailcore import blocks
from wagtail.wagtailcore.fields import StreamField
from wagtail.wagtailcore.models import Page
from wagtail.wagtailimages.blocks import ImageChooserBlock

class Block(blocks.StructBlock):
    heading = blocks.CharBlock(required=True)
    content = blocks.RichTextBlock()


class SimplePage(Page):
    left = StreamField(Block)
    right = StreamField(Block)

Cheers,

Roel

[Matthew Westcott]

Hi Roel,
No, this isn't supported - the top-level block of a StreamField must be a StreamBlock, and there is no way to use blocks outside of StreamField.

In this situation, your best option is to define the page content as separate fields:

class SimplePage(Page):
left_heading = fields.CharField(max_length=255)
left_content = RichTextField()
right_heading = fields.CharField(max_length=255)
right_content = RichTextField()

Cheers,
- Matt

[Roel Obdam]

Thanks for the answer Matthew.

Do you think that a field that can hold a single block would be a common use-case? The solution you propose does not use the nice reusable Block structures.

Or the stream field could have a cardinality option...

Thanks again for all your work!

Op donderdag 22 december 2016 17:52:48 UTC+1 schreef Matthew Westcott:

[Matthew Westcott]

Yes, I think it would be a worthwhile addition to have alternatives to StreamField that accept different block types at the top level. There's a ticket for that here: https://github.com/wagtail/wagtail/issues/2048

Cheers,
- Matt

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