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'RelatedManager'オブジェクトは反復可能ではありませんDjango

ちょっと私はSOでいくつかの同様の投稿を見て回ったが、私の問題を解決したものを見つけていない。私は次のモデルを持っている、

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

次のビューが設定されています

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))

そのようにworld_areasオブジェクトを反復しようとしています

{% for area in world_areas %}

テンプレート構文エラーを生成します

'RelatedManager'オブジェクトは反復可能ではありません

なぜこれが起こっているのか、何かアイデアがありますか？本当にこれを回避できないようです！これはシェルで私のために働いています：S私は明らかな何かを見逃していますか？

誰でも助けてくれてありがとう！

djangodjango-modelsdjango-viewsdjango-queryset
49
Mike Waites

Callall()は、マネージャーから要素を取得します。

{% for area in world_areas.all %}
134
laffuste

一般に、valuesまたはvalues_listを使用して、クエリセットからテンプレートにデータを渡すことをお勧めします。

world_areas = Areas.objects.select_related().all().values_list('name', 'order_in_sidebar_network', ...)

values関数を使用したことがない場合の使用方法については、 Django docs をご覧ください。

10
Craig Blaszczyk

私は無謀な間違いでこの問題に遭遇しました：

_ for physicalserver in task.physicalservers:
        physicalserver.relieve_task()
_

_task.physicalservers_はRelatedManagerオブジェクトです。私の場合、タスクの物理サーバーを取得する必要があり、.all()を追加する必要があります。

_for physicalserver in task.physicalservers.all():
_
4
aircraft