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Copy pathfields.py
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103 lines (79 loc) · 3.33 KB
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# ------------------------------------------------------------------------
# ------------------------------------------------------------------------
from django.contrib.admin.widgets import AdminFileWidget, ForeignKeyRawIdWidget
from django.db import models
from django.utils.html import escape, mark_safe
from django.utils.translation import gettext_lazy as _
from feincms.admin.item_editor import FeinCMSInline
from feincms.utils import shorten_string
from .models import MediaFile
from .thumbnail import admin_thumbnail
__all__ = ("MediaFileForeignKey", "ContentWithMediaFile")
# ------------------------------------------------------------------------
class MediaFileForeignKeyRawIdWidget(ForeignKeyRawIdWidget):
def __init__(self, original):
self.__dict__ = original.__dict__
def label_and_url_for_value(self, value):
label, url = super().label_and_url_for_value(value)
key = "pk"
try:
obj = (
self.rel.model._default_manager.using(self.db)
.filter(**{key: value})
.first()
)
label = [" <strong>%s</strong>" % escape(shorten_string(str(obj)))]
image = admin_thumbnail(obj)
if image:
label.append(
'<br /><img src="%s" alt="" style="margin:1em 0 0 170px"'
"/>" % image
)
return mark_safe("".join(label)), url
except (ValueError, self.rel.model.DoesNotExist):
return label, url
class MediaFileForeignKey(models.ForeignKey):
"""
Drop-in replacement for Django's ``models.ForeignKey`` which automatically
adds a thumbnail of media files if the media file foreign key is shown
using ``raw_id_fields``.
"""
def __init__(self, *args, **kwargs):
if not args and "to" not in kwargs:
args = (MediaFile,)
super().__init__(*args, **kwargs)
def formfield(self, **kwargs):
if "widget" in kwargs and isinstance(kwargs["widget"], ForeignKeyRawIdWidget):
kwargs["widget"] = MediaFileForeignKeyRawIdWidget(kwargs["widget"])
return super().formfield(**kwargs)
class ContentWithMediaFile(models.Model):
class feincms_item_editor_inline(FeinCMSInline):
raw_id_fields = ("mediafile",)
mediafile = MediaFileForeignKey(
MediaFile,
verbose_name=_("media file"),
related_name="+",
on_delete=models.PROTECT,
)
class Meta:
abstract = True
# ------------------------------------------------------------------------
class AdminFileWithPreviewWidget(AdminFileWidget):
"""
Simple AdminFileWidget, but detects if the file is an image and
tries to render a small thumbnail besides the input field.
"""
def render(self, name, value, attrs=None, *args, **kwargs):
r = super().render(name, value, attrs=attrs, *args, **kwargs)
if value and getattr(value, "instance", None):
image = admin_thumbnail(value.instance)
if image:
r = mark_safe(
(
'<img src="%s" alt="" style="float: left; padding-right:'
'8px; border-right: 1px solid #ccc; margin-right: 8px"'
">" % image
)
+ r
)
return r