Python Django与field和Manytomy的独特合作关系
我正在尝试用语言和内容创建帖子,并将其关联到同一页面的其他版本上,但我被卡住了Python Django与field和Manytomy的独特合作关系,python,django,postgresql,model,many-to-many,Python,Django,Postgresql,Model,Many To Many,我正在尝试用语言和内容创建帖子,并将其关联到同一页面的其他版本上,但我被卡住了 class Page(models.Model): content = models.TextField() language = models.CharField(max_length=7, choices=settings.LANGUAGES) versions = models.ManyToManyField('self', blank=True) class Meta:
class Page(models.Model):
content = models.TextField()
language = models.CharField(max_length=7, choices=settings.LANGUAGES)
versions = models.ManyToManyField('self', blank=True)
class Meta:
unique_together = ('language', 'versions',)
这将无法正常工作,因为Django不允许生成多个“唯一”字段
然后我尝试通过相关模型建立相同的关系:
class VersionsPage(models.Model):
pass
# ToDo: add unique together here, to foreign key field
class Page(models.Model):
...
versions = models.ManyToManyField('self', blank=True, through="VersionsPage")
有人知道如何在不使用symmetric=False的情况下实现这一点吗?我想您正在寻找这样的东西:
class Page(models.Model):
pass
class PageVersion(models.Model):
page = models.ForeignKey(Page, related_name='versions')
content = models.TextField()
language = models.CharField(max_length=7, choices=settings.LANGUAGES)
class Meta:
unique_together = ('page', 'language',)
#getting all page versions:
page = Page.objects.get(pk=some_id)
versions = page.versions.all()