81 lines
2.8 KiB
Python
81 lines
2.8 KiB
Python
from django.db import models
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from django.utils.html import mark_safe
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from django.utils.translation import gettext_lazy as _
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from grapple.models import (
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GraphQLString,
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)
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from grapple.utils import get_media_item_url
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from wagtail.images.models import AbstractImage, AbstractRendition, Image
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from wagtail.search import index
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class CustomImage(AbstractImage):
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alt = models.CharField(
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max_length=512,
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blank=True,
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verbose_name="Alternativ tekst",
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help_text=(
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"Er ikke synlig på nettsiden, men leses opp for de som bruker skjermlesere. "
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"Viktig for SEO og tilgjengelighet. "
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"Beskriv det du ser i bildet som til en blind person. "
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'F.eks. "Portrettbilde av Jahn Teigen" eller '
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'"To personer på en scene som skyter på hverandre med luftpistoler"'
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),
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)
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attribution = models.CharField(
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max_length=255,
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blank=True,
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verbose_name="Kreditering",
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help_text=mark_safe(
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"<em>Foto:</em> eller <em>Illustrasjon: </em> etterfulgt av "
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"navn på fotograf, illustratør, organisasjon, eller liknende."
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),
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)
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admin_form_fields = Image.admin_form_fields + ("alt", "attribution")
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@property
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def default_alt_text(self):
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return self.alt or self.title
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class Meta(AbstractImage.Meta):
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verbose_name = _("image")
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verbose_name_plural = _("images")
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permissions = [
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("choose_image", "Can choose image"),
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]
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@property
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def versioned_url(self):
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# Original files keep their upload name, so deleting an image and
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# uploading another with the same name reuses the URL. The content hash
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# makes the URL change with the file, which lets the media proxy and
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# Next's image optimizer cache it as immutable.
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url = get_media_item_url(self)
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if not self.file_hash:
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return url
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return f"{url}?v={self.file_hash[:8]}"
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graphql_fields = [
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# Replaces Grapple's own `url` field and resolver
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GraphQLString("url", source="versioned_url", required=True),
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GraphQLString("alt"),
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GraphQLString("attribution"),
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]
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# Wagtail indexes title, description and tags. Editors describe the picture
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# in `alt` rather than in `description`, so it is boosted alongside title.
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search_fields = AbstractImage.search_fields + [
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index.SearchField("alt", boost=10),
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index.AutocompleteField("alt"),
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index.SearchField("attribution"),
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index.AutocompleteField("attribution"),
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]
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class Rendition(AbstractRendition):
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image = models.ForeignKey(CustomImage, on_delete=models.CASCADE, related_name="renditions")
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class Meta:
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unique_together = (("image", "filter_spec", "focal_point_key"),)
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