'RelatedManager' object is not iterable Django

Hey i have looked around through some simliar posts here on SO but havent found anything that has solved my problem. I have the following models,

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

i have the following view set up

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))

trying to iterate over the world_areas object like so

{% for area in world_areas %}

produces a template syntax error

> 'RelatedManager' object is not iterable

Any one got any ideas why this is happeing? really cant seem to get round this! strangley this is working for me in shell :S am i missing something obvious???

Big thanks to anyone able to help!

Call all() to retrieve the elements from the manager.

{% for area in world_areas.all %}

In general, it is better practice to use a values or values_list to pass data from a queryset to a template.

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

Check out the Django docs for info on how to use the values function if you haven't used it before.

I run into this issue by a reckless mistake:

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

The task.physicalservers is RelatedManager object, in my case I should get the task's physicalservers, there should add .all().

for physicalserver in task.physicalservers.all():

You have to iterate over set to get values related to a fk in a model.

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 %}