'RelatedManager‘对象不是可迭代的Django
'RelatedManager‘对象不是可迭代的Django
提问于 2011-07-15 08:59:36
嘿，我在这里看过一些简单的帖子，但是没有找到任何解决我问题的方法。我有以下模型，
from django.db import models
class Areas(models.Model):
name = models.CharField(max_length = 120)
order_in_sidebar_network = models.IntegerField(blank=True, null=True)
order_in_section_network = models.IntegerField(blank=True, null=True)
def __unicode__ (self):
return self.area_name
class Meta:
verbose_name_plural = "Areas"
verbose_name = "Area"
class Countries(models.Model):
name = models.CharField(max_length = 120, help_text = "The name of the country")
area = models.ForeignKey(Areas, verbose_name = 'Area')
def __unicode__ (self):
return self.name
class Meta:
verbose_name_plural = "Countries"
verbose_name = "Country"
ordering = ['name']
class Offices(models.Model):
country = models.ForeignKey(Countries, verbose_name = 'Country')
name = models.CharField(max_length = 255, help_text = "The name of this office, IE London")
main_office = models.BooleanField(default= False, help_text = "Is this office a key location?", verbose_name = "Key Location")
address_1 = models.CharField(max_length = 255, null = True, blank = True)
address_2 = models.CharField(max_length = 255, null = True, blank = True)
address_3 = models.CharField(max_length = 255, null = True, blank = True)
city = models.CharField(max_length = 255, null = True, blank = True)
postcode = models.CharField(max_length = 20)
tel = models.CharField(max_length = 30, null= True, blank = True, help_text = "Optional telephone contact number")
mobile = models.CharField(max_length = 30, null= True, blank = True, help_text = "Optional mobile contact number")
fax = models.CharField(max_length = 30, null= True, blank = True, help_text = "Optional fax contact number")
data_1 = models.CharField(max_length = 255, null = True, blank = True, help_text = "Optional additional data", verbose_name = "Additional information")
data_2 = models.CharField(max_length = 255, null = True, blank = True, help_text = "Optional additional data", verbose_name = "Additional information")
class Meta:
verbose_name_plural = "Offices"
verbose_name = "Office"
ordering = ['name']
def __unicode__(self):
return self.name
class OfficeMembers(models.Model):
name = models.CharField(max_length = 60, help_text = "Please tell us this person name")
title = models.CharField(max_length = 100, help_text = "The person's title, IE Managing Director")
email = models.EmailField(max_length = 255, null = True, blank = True, help_text = "Optional email address for this person")
email2 = models.EmailField(max_length = 255, null = True, blank = True, help_text = "Optional second email address for this person")
phone = models.CharField(max_length = 30, null = True, blank = True, help_text = "Optional contact number for this person")
mobile = models.CharField(max_length = 30, null = True, blank = True, help_text = "Optional mobile contact number for this person")
office = models.ForeignKey(Offices, null = True)
class Meta:
verbose_name_plural = "Office Memebers"
verbose_name = "Office memebr"
ordering = ['name']
def __unicode__(self):
return self.name我已经设置了以下视图
def index(request):
cache_key = "world_areas"
cache_time = 60
world_areas_cache = cache.get(cache_key)
#if no cache is set, grab the objects, and set the cache
logger.debug(world_areas)
if not world_areas_cache:
logger.info('No cache found grabbing objects')
world_areas = Areas.objects.select_related().all()
#cache.set(cache_key, world_areas, cache_time)
logger.debug(world_areas)
else:
logger.info("Getting from cache")
world_areas = world_areas_cache
return render_to_response('network/index.html', {'world_areas':world_areas}, context_instance=RequestContext(request))尝试迭代world_areas对象，如下所示
{% for area in world_areas %}生成模板语法错误。
'RelatedManager‘对象不可迭代
有人知道为什么这是触碰吗？真的很难绕开这件事！绞尽脑汁，这是为我工作的贝壳:我是不是错过了一些明显的东西？
感谢任何能帮忙的人！
Stack Overflow用户
发布于 2021-09-20 10:53:26
您必须对集合进行迭代，以获得模型中与fk相关的值。
class Area(models.Model):
name = models.CharField(max_length = 120)
order_in_sidebar_network = models.IntegerField(blank=True, null=True)
order_in_section_network = models.IntegerField(blank=True, null=True)
class CountryArea(models.Model):
name = models.CharField(max_length = 120)
area = models.ForeignKey(Area, verbose_name = 'Area')
## Assuming you have an object; area
## To get the all the counties related to that area you can do;
{% for obj in area.countryarea_set.all %}
<h4> {{ obj.name }} </h4>
{% endfor %}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/6704749
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