Django管理表单，外键中的字段而不是对象

Question

我使用外来键从我的父对象中引用另一个对象。但是，当我转到 django admin 创建的下拉列表时，我得到的是对象名称而不是字段值。我怎样才能将字段值添加到表单中？

admin.py

    from django.contrib import admin

from .models import Maintenance
from .models import MaintenanceType
from .models import ServiceType

# Register your models here.


class MaintenanceAdmin(admin.ModelAdmin):
    list_display = ('Title','Impact','Service','Description','StartTime','EndTime',)
    list_editable = ('Title','Impact','Service','Description','StartTime','EndTime',)


admin.site.register(Maintenance, MaintenanceAdmin)

class MaintenanceTypeAdmin(admin.ModelAdmin):
    list_display = ('Type',)
    list_editable = ('Type',)

admin.site.register(MaintenanceType, MaintenanceTypeAdmin)

class ServiceTypeAdmin(admin.ModelAdmin):
    list_display = ('Service','Service',)
    list_editable = ('Service','Service',)

admin.site.register(ServiceType, ServiceTypeAdmin)

models.py

from django.db import models

# Create your models here.

class MaintenanceType(models.Model):
    Type = models.CharField(max_length=200)

    class Meta:
                verbose_name = "Planned Maintenance Types"
                verbose_name_plural = "Planned Maintenance Types"

class ServiceType(models.Model):
    Service = models.CharField(max_length=200)

    class Meta:
                verbose_name = "Service Types"
                verbose_name_plural = "Service Types"                

class Maintenance(models.Model):
    Title = models.CharField(max_length=200)
    Impact = models.ForeignKey(MaintenanceType)
    Service = models.ForeignKey(ServiceType)
    Description = models.TextField()
    StartTime = models.DateTimeField()
    EndTime = models.DateTimeField()

    class Meta:
                verbose_name = "Planned IT Maintenance"
                verbose_name_plural = "Planned IT Maintenance"                

Answer 1

在MaintenanceType 模型中实现__str__，它应该以您希望出现在下拉列表中的任何格式返回一个字符串（实际上是在其他任何地方）。

看来您只需要return self.Type。

Answer 2

仅限 Python 2

您可以通过设置 unicode 方法来指定通过访问对象返回的内容，以重新调整您想要的内容。

所以我认为你的MaintenanceType 应该是这样的

class MaintenanceType(models.Model):
    Type = models.CharField(max_length=200)

    class Meta:
                verbose_name = "Planned Maintenance Types"
                verbose_name_plural = "Planned Maintenance Types"

    def __unicode__(self):
        return self.Type