python - 从 django admin 添加实例

Question

这就是我的类(class)的样子。

class School(models.Model):
    state = models.ForeignKey(State, on_delete=models.CASCADE)
    region = models.ForeignKey(Region, on_delete=models.CASCADE)
    cluster = models.ForeignKey(Cluster, on_delete=models.CASCADE)
    school_name = models.CharField(max_length=250)
    facilitator = models.CharField(max_length=250)
    f_number = models.IntegerField()
    f_email = models.EmailField()
    school_logo = models.FileField(default='')
    school_strength = models.IntegerField()

在哪个州，地区，集群也是类。我试图创建一个学校网络，分为 3 个级别，即州、地区、集群。我假设当我从 django admin 添加学校时，我认为如果我选择状态和过滤集群，它可能会过滤区域，当我选择区域时，它会很容易。但这似乎不起作用。虽然在选择特定的州和地区并在集群下拉列表中添加学校后，所有州和地区的所有集群都会出现。

是否有针对此问题的解决方案或目前我们在 django 中没有这样的选项？

Answer 1

尝试来自 django-smart-selects 的 ChainedForeignKey打包它就像变魔术一样。

安装smart_selects

pip install django-smart-selects

项目设置.py

INSTALLED_APPS=[
    . . . . .
    . . . . .
    'smart_selects',
    . . . . .
]

项目 urls.py

urlpatterns = [
    . . . . .
    url(r'^admin/', include(admin.site.urls)),
    url(r'^chaining/', include('smart_selects.urls')),
    . . . . .
]

参见 installation of django-smart-selects

ChainedForeignKey 的工作

from smart_selects.db_fields import *

class State(models.Model):
    stateName = models.CharField(max_length=500)
    . . . . 

class Region(models.Model):
    state = models.ForeignKey(State, on_delete=models.CASCADE)
    regionName = models.CharField(max_length=500)
    . . . . .
    . . . . .


class Cluster(models.Model):
    state = models.ForeignKey(State, on_delete=models.CASCADE)
    region = ChainedForeignKey(Region,chained_field="state",chained_model_field="state", show_all=False, auto_choose=True, sort=False, on_delete=models.CASCADE)
    clusterName = models.CharField(max_length=500)
    . . . . .
    . . . . .  



class school(models.Model):
    state = models.ForeignKey(State, on_delete=models.CASCADE)
    region = ChainedForeignKey(Region, chained_field="state",chained_model_field="state", show_all=False, auto_choose=True, sort=False, on_delete=models.CASCADE)
    cluster = ChainedForeignKey(Cluster, chained_field="region",chained_model_field="region", show_all=False, auto_choose=True, sort=False, on_delete=models.CASCADE)
    schoolName = models.CharField(max_length=500)
    . . . . 
    . . . .

试试这个，它在 admin area 中运行得很好。