问题描述
class AnnoncePage(Page):
date = models.DateField("Date de publication",blank=True,null=True)
description = RichTextField(features=['h2','h3','bold','italic','link','hr','ol','ul'],blank=True)
lieu = models.CharField(blank=True,max_length=200)
surface = models.PositiveSmallIntegerField(blank=True,null=True)
nb_pieces = models.PositiveSmallIntegerField(blank=True,null=True)
prix_affiché_index = models.CharField(blank=True,max_length=200,null=True)
conditions_vente_et_prix = RichTextField(blank=True,features=['h2','ul'])
def main_image(self):
gallery_item = self.gallery_images.first()
if gallery_item:
return gallery_item.image
else:
return None
content_panels = Page.content_panels + [
FieldPanel('date'),InlinePanel('gallery_images',label="gallery images"),FieldPanel('lieu',classname="full"),FieldPanel('surface',FieldPanel('nb_pieces',FieldPanel('description',FieldPanel('prix_affiché_index',FieldPanel('conditions_vente_et_prix',classname="full")
]
promote_panels = []
settings_panels = []
max_count = 20
class AnnoncePagegalleryImage(Orderable):
page = ParentalKey(AnnoncePage,on_delete=models.SET_NULL,related_name='gallery_images',null=True)
image = models.ForeignKey(
'wagtailimages.Image',related_name='+',null=True
)
panels = [
ImageChooserPanel('image')
]
在删除Annonce页面本身之后,如何自动删除Annonce页面的图像?我需要更改模型吗?
解决方法
Watail图像对象可以在其他地方使用。自动删除这些内容可能会对其他内容产生不良影响。
您可以向./gradlew :dependencies
添加delete
方法,也可以使用AnnoncePage
信号。您需要遍历所有相关的图库图像并删除相关的Wagtail图像。 Django将文件保留在磁盘上,因此您可能也想处理该文件。
pre_delete
免责声明:未经测试的代码。
https://docs.djangoproject.com/en/dev/topics/db/models/#overriding-model-methods https://docs.djangoproject.com/en/dev/ref/signals/#pre-delete https://docs.djangoproject.com/en/3.1/ref/models/fields/#django.db.models.fields.files.FieldFile.delete
请注意,批量操作不会调用class AnnoncePage(Page):
...
def delete(self):
for gallery_image in self.gallery_images.all():
# Delete the file on disk here ...
# After,delete the db obj.
gallery_image.image.all().delete()
self.gallery_images.all().delete()
super().delete()
方法和delete
信号。您的里程可能会有所不同。