Problem saving page with an extra orderable and snippet

Question

I have some problems saving an Article page in wagtail, I have 3 classes: ArticlePageModule, ArticlePageModulePlacement and ArticlePage

The error says:

File "/opt/miniconda3/envs/nefodev/lib/python3.7/site-packages/django/db/models/base.py", line 1222, in full_clean
    raise ValidationError(errors)
django.core.exceptions.ValidationError: {'title': ['This field cannot be blank.']}

My intention is to have a section of dynamic articles that you can add using the snippet like this:

Page with several articles (preview only).
By clicking on the article send to your own article page
In the wagtail admin you can manage the articles by publication dates

My code (supported by this code: this)

from django.db import models
from wagtail.core.fields import StreamField
from wagtail.admin.edit_handlers import FieldPanel, StreamFieldPanel, InlinePanel
from wagtail.images.edit_handlers import ImageChooserPanel
from wagtail.core.models import Page, Orderable
from modelcluster.fields import ParentalKey
from wagtail.snippets.models import register_snippet
from wagtail.snippets.edit_handlers import SnippetChooserPanel
from wagtail.images.blocks import ImageChooserBlock
from wagtail.core import blocks
from wagtail.contrib.routable_page.models import RoutablePageMixin, route


# Create your models here.
@register_snippet
class ArticlePageModule(models.Model):

    title = models.CharField(max_length=80)
    subtitle = models.CharField(max_length=50)
    thumbImage =  models.ForeignKey(
        'wagtailimages.Image',
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name='+'
    )

    panels = [
        FieldPanel('title'),
        FieldPanel('subtitle'),
        ImageChooserPanel('thumbImage')
    ]

    def __str__(self):
        return self.title

class ArticlePageModulePlacement(Orderable, models.Model):
    page = ParentalKey('blog.ArticlePage', on_delete=models.CASCADE, related_name='article_module_placements')

    article_module = models.ForeignKey(ArticlePageModule, on_delete=models.CASCADE, related_name='+')

    slug = models.SlugField()

    panels = [
        FieldPanel('slug'),
        SnippetChooserPanel('article_module'),
    ]

class ArticlePage(Page, RoutablePageMixin):

    content = StreamField([
        ('heading', blocks.CharBlock()),
        ('content', blocks.RichTextBlock()),
        ('image', ImageChooserBlock()),
    ])

    content_panels = [
        InlinePanel('article_module_placements', label="Modules"),
        StreamFieldPanel('content')
    ]

    @route(r'^module/(?P<slug>[\w\-]+)/$')
    def page_with_module(self, request, slug=None):
        self.article_module_slug = slug
        return self.serve(request)


    def get_context(self, request):
        context = super().get_context(request)

        if hasattr(self, 'article_module_slug'):
            context['ArticlePageModule'] = self.article_module_placements.filter(slug = self.article_module).first().article_module

        return context

score 0 · Accepted Answer · answered May 12 '20 at 01:07

You've left out the page title field from content_panels - as the error message says, this is a required field on page models. Normally, you'd pull this in from Page.content_panels:

class ArticlePage(Page, RoutablePageMixin):
    # ...

    content_panels = Page.content_panels + [
        InlinePanel('article_module_placements', label="Modules"),
        StreamFieldPanel('content')
    ]

Problem saving page with an extra orderable and snippet

1 Answers1