如何在django admin中添加双向manytomanyfields？

Question

在我的models.py我有类似的东西:

class LocationGroup(models.Model):
    name = models.CharField(max_length=200)

class Report(models.Model):
    name = models.CharField(max_length=200)
    locationgroups = models.ManyToManyField(LocationGroup)

admin.py(标准):

admin.site.register(LocationGroup)
admin.site.register(Report)

当我进入Report的管理页面时,它会显示一个很好的多选字段.如何在LocationGroup中添加相同的多选字段？我可以通过调用LocationGroup.report_set.all()来访问所有报告

Answer 1

我找到的解决方法是遵循ManyToManyFields与中间模型的说明.即使您没有使用"直通"模型功能,也只是假装自己并使用必要的ForeignKey创建存根模型.

# models:  make sure the naming convention matches what ManyToManyField would create
class Report_LocationGroups(models.Model):
    locationgroup = models.ForeignKey(LocationGroup)
    report = models.ForeignKey(Report)

# admin
class ReportInline(admin.TabularInline):
    model = models.Report_LocationGroups

class LocationGroupAdmin(admin.ModelAdmin):
    inlines = ReportInline,