从Django管理站点中显示的引用模型中获取字段值
我有两种型号——合同型和供应商型。每个供应商供应一种商品。这些定义如下:从Django管理站点中显示的引用模型中获取字段值,django,python-2.7,django-models,django-admin,Django,Python 2.7,Django Models,Django Admin,我有两种型号——合同型和供应商型。每个供应商供应一种商品。这些定义如下: class CommodityType(models.Model): name = models.CharField(max_length=64) def __unicode__(self): return self.name class Supplier(models.Model): name = models.CharField(max_length=64) type
class CommodityType(models.Model):
name = models.CharField(max_length=64)
def __unicode__(self):
return self.name
class Supplier(models.Model):
name = models.CharField(max_length=64)
type = models.ForeignKey(CommodityType)
def __unicode__(self):
return self.name
class Meta:
ordering = ['type', 'name']
class Contract(models.Model):
supplier = models.ForeignKey(Supplier)
clientNumber = models.CharField(max_length=32)
def __unicode__(self):
return u'%s, %s' % (self.supplier, self.clientNumber)
我想在Django管理站点中有一个合同的列表。对于每个合同
,我希望显示引用的供应商
的类型。例如,如果相关供应商提供电力,那么我希望将其显示在合同列表中
然而,我似乎无法找到这是如何做到的。我发现了,但这样做会给我一个配置不当的错误
如何做到这一点?您可能需要的是
要在管理员中允许外键使用\uuuuuuu
,可以使用
从片段中:
from django.contrib import admin
from django.db import models
def getter_for_related_field(name, admin_order_field=None, short_description=None):
"""
Create a function that can be attached to a ModelAdmin to use as a list_display field, e.g:
client__name = getter_for_related_field('client__name', short_description='Client')
"""
related_names = name.split('__')
def getter(self, obj):
for related_name in related_names:
obj = getattr(obj, related_name)
return obj
getter.admin_order_field = admin_order_field or name
getter.short_description = short_description or related_names[-1].title().replace('_',' ')
return getter
class RelatedFieldAdminMetaclass(admin.ModelAdmin.__metaclass__):
"""
Metaclass used by RelatedFieldAdmin to handle fetching of related field values.
We have to do this as a metaclass because Django checks that list_display fields are supported by the class.
"""
def __getattr__(self, name):
if '__' in name:
getter = getter_for_related_field(name)
setattr(self, name, getter) # cache so we don't have to do this again
return getter
raise AttributeError # let missing attribute be handled normally
class RelatedFieldAdmin(admin.ModelAdmin):
"""
Version of ModelAdmin that can use related fields in list_display, e.g.:
list_display = ('address__city', 'address__country__country_code')
"""
__metaclass__ = RelatedFieldAdminMetaclass
def queryset(self, request):
qs = super(RelatedFieldAdmin, self).queryset(request)
# include all related fields in queryset
select_related = [field.rsplit('__',1)[0] for field in self.list_display if '__' in field]
# Include all foreign key fields in queryset.
# This is based on ChangeList.get_query_set().
# We have to duplicate it here because select_related() only works once.
# Can't just use list_select_related because we might have multiple__depth__fields it won't follow.
model = qs.model
for field_name in self.list_display:
try:
field = model._meta.get_field(field_name)
except models.FieldDoesNotExist:
continue
if isinstance(field.rel, models.ManyToOneRel):
select_related.append(field_name)
return qs.select_related(*select_related)
#### USAGE ####
class FooAdmin(RelatedFieldAdmin):
# these fields will work automatically:
list_display = ('address__phone','address__country__country_code','address__foo')
# ... but you can also define them manually if you need to override short_description:
address__foo = getter_for_related_field('address__foo', short_description='Custom Name')
您可能需要的是
要在管理员中允许外键使用\uuuuuuu
,可以使用
从片段中:
from django.contrib import admin
from django.db import models
def getter_for_related_field(name, admin_order_field=None, short_description=None):
"""
Create a function that can be attached to a ModelAdmin to use as a list_display field, e.g:
client__name = getter_for_related_field('client__name', short_description='Client')
"""
related_names = name.split('__')
def getter(self, obj):
for related_name in related_names:
obj = getattr(obj, related_name)
return obj
getter.admin_order_field = admin_order_field or name
getter.short_description = short_description or related_names[-1].title().replace('_',' ')
return getter
class RelatedFieldAdminMetaclass(admin.ModelAdmin.__metaclass__):
"""
Metaclass used by RelatedFieldAdmin to handle fetching of related field values.
We have to do this as a metaclass because Django checks that list_display fields are supported by the class.
"""
def __getattr__(self, name):
if '__' in name:
getter = getter_for_related_field(name)
setattr(self, name, getter) # cache so we don't have to do this again
return getter
raise AttributeError # let missing attribute be handled normally
class RelatedFieldAdmin(admin.ModelAdmin):
"""
Version of ModelAdmin that can use related fields in list_display, e.g.:
list_display = ('address__city', 'address__country__country_code')
"""
__metaclass__ = RelatedFieldAdminMetaclass
def queryset(self, request):
qs = super(RelatedFieldAdmin, self).queryset(request)
# include all related fields in queryset
select_related = [field.rsplit('__',1)[0] for field in self.list_display if '__' in field]
# Include all foreign key fields in queryset.
# This is based on ChangeList.get_query_set().
# We have to duplicate it here because select_related() only works once.
# Can't just use list_select_related because we might have multiple__depth__fields it won't follow.
model = qs.model
for field_name in self.list_display:
try:
field = model._meta.get_field(field_name)
except models.FieldDoesNotExist:
continue
if isinstance(field.rel, models.ManyToOneRel):
select_related.append(field_name)
return qs.select_related(*select_related)
#### USAGE ####
class FooAdmin(RelatedFieldAdmin):
# these fields will work automatically:
list_display = ('address__phone','address__country__country_code','address__foo')
# ... but you can also define them manually if you need to override short_description:
address__foo = getter_for_related_field('address__foo', short_description='Custom Name')
你读了我问题的最后一部分了吗?我想显示引用供应商的字段,而不是供应商本身。是的,太好了!这正是我所需要的:)谢谢。也许你可以澄清最后一部分以便将来参考。你读了我问题的最后一部分了吗?我想显示引用供应商的字段,而不是供应商本身。是的,太好了!这正是我所需要的:)谢谢。也许你可以澄清最后一部分,以便将来参考。