Django parent.child_set no errors but not showing in html - django-views

Question

Views.py defining the context in view
def customers(request, pk):
customer = Customer.objects.get(id=pk)
issues = customer.issue_set.all()
receives = customer.receive_set.all()
context={'customer':customer,'issues':issues,'receives':receives}
return render(request,'accounts/customers.html')
in html
<div class="col-md">
<div class="card card-body">
<h5>Contact Information</h5>
<hr>
<p>Email: {{customer.email}}</p>
<p>Phone: {{customer.phone}}</p>
</div>
</div>
{% for issue in issues %}
<td>{{issue.item}}</td>>
<td>{{issue.item.category}}</td>
<td>{{issue.date_created}}</td>
<td>{{issue.status}}</td>
<td><a href="">UPDATE</td>
<td><a href="">DELETE</td>
{% endfor %}
#Model
class Item(models.Model):
CATEGORY = (
('Gudang Kering', 'Gudang Kering'),
('Gudang Basah','Gudang Basah'),
)
name = models.CharField(max_length=200,null= True)
stock = models.IntegerField(default='0', blank=False, null=True)
category = models.CharField(max_length=200,null= True,choices=CATEGORY)
reorderlevel = models.IntegerField(default='0', blank=False, null=True)
maxreorderlevel = models.IntegerField(default='0', blank=False, null=True)
description = models.CharField(max_length=200,null= True, blank= True)
date_created = models.DateTimeField(auto_now_add= True)
tags = models.ManyToManyField(Tag)
def __str__(self):
return self.name
class Issue(models.Model):
STATUS = (
('Pending', 'Pending'),
('Granted','Granted'),
('Denied','Denied'),
)
customer = models.ForeignKey(Customer, null=True, on_delete= models.SET_NULL)
item = models.ForeignKey(Item, null=True, on_delete= models.SET_NULL)
quantity = models.IntegerField(default='0', blank=False, null=True)
date_created = models.DateTimeField(auto_now_add=True, auto_now=False)
status = models.CharField(max_length=200,null= True, choices=STATUS)
def __str__(self):
return self.status + ' ' +str(self.customer)
I tried to get the object by id of the customer in order to make it a dynamic url where the url will depend on str:pk of customer id
i managed to show output data if i do
customer = Customer.objects.all #but that will show all the customer
so i tried as in the view to get the id
and define it with parent.child_set.all
but it doesn't show up,even the text update and delete don't show up in