I have the following models, with publication needing a m2m with authors via the join table specified, I have done this but keep getting the error:
我有以下模型,发布需要一个m2m与作者通过指定的连接表,我已经做到这一点,但不断得到错误:
Error: One or more models did not validate:
publications.workshop: 'staff' is a manually-defined m2m relation through model AuthorsJoinTable, which does not have foreign keys to Staff and Workshop
publications.technicalreport: 'staff' is a manually-defined m2m relation through model AuthorsJoinTable, which does not have foreign keys to Staff and TechnicalReport
publications.authorsjointable: 'publication' has a relation with model Publication, which has either not been installed or is abstract.
publications.authorsjointable: "unique_together" refers to staff, a field that doesn't exist. Check your syntax.
My models look like:
我的模型看起来像:
class Publication(models.Model):
title = models.CharField(max_length=500)
staff = models.ManyToManyField("personnel.Staff", related_name='%(app_label)s_%(class)s_related', through='AuthorsJoinTable')
tag = models.ManyToManyField("Tag", related_name='%(app_label)s_%(class)s_related')
class Meta:
abstract = True
class Workshop(Publication):
location = models.CharField(max_length=100)
workshop_title = models.CharField(max_length=100)
start_date = models.DateField()
end_date = models.DateField()
def __unicode__(self):
return u'%s - %s' % (self.title, self.workshoptitle)
class TechnicalReport(Publication):
published_date = models.DateField()
class AuthorsJoinTable(models.Model):
author = models.ForeignKey("Author", related_name='%(app_label)s_%(class)s_from')
publication = models.ForeignKey("Publication", related_name='%(app_label)s_%(class)s_to')
order = models.IntegerField()
class Meta:
unique_together = ('staff', 'publication')
class Tag(models.Model):
tag_name = models.CharField(max_length=100, primary_key=True)
class Author(models.Model):
name = models.CharField(max_length=100)
biography = models.TextField()
So how can I resolve this problem?
那么我该如何解决这个问题呢?
1 个解决方案
#1
1
publications.authorsjointable: "unique_together" refers to staff, a field that doesn't exist. Check your syntax.
publications.authorsjointable:“unique_together”指的是员工,一个不存在的领域。检查你的语法。
You can't create a ForeignKey on absract model because that model does not have a table in DB and therefore does not have primary key to reference. So you should make your Publication
non-abstract or reference Workshop
instead. Other error lines should also be gone after that.
您不能在absract模型上创建ForeignKey,因为该模型在DB中没有表,因此没有要引用的主键。因此,您应该使您的出版物非抽象或参考Workshop。之后其他错误行也应该消失。
#1
1
publications.authorsjointable: "unique_together" refers to staff, a field that doesn't exist. Check your syntax.
publications.authorsjointable:“unique_together”指的是员工,一个不存在的领域。检查你的语法。
You can't create a ForeignKey on absract model because that model does not have a table in DB and therefore does not have primary key to reference. So you should make your Publication
non-abstract or reference Workshop
instead. Other error lines should also be gone after that.
您不能在absract模型上创建ForeignKey,因为该模型在DB中没有表,因此没有要引用的主键。因此,您应该使您的出版物非抽象或参考Workshop。之后其他错误行也应该消失。