access foreign key via a manytomany relationship in django - django

Question

I have a foreign key that is in turn a many to many relation like the following:
Persons<-M2M->Role(ManyToOne)->Name
The model:
class Person(models.Model):
mail=models.EmailField()
firstName=models.CharField(max_length=200)
lastName=models.CharField(max_length=200)
phoneNumber=PhoneNumberField()
streetAdress=models.CharField(max_length=200)
zipcode=models.CharField(max_length=200)
city=models.CharField(max_length=200,default="Göteborg")
country=models.CharField(max_length=200,default="Sweden")
def __str__(self):
return "%s %s" % (self.firstName,self.lastName)
class Meta:
ordering = ('firstName','lastName')
class Role(models.Model):
role=models.CharField(max_length=200)
person=models.ManyToManyField(Person)
def __str__(self):
return self.role
class Meta:
ordering = ('role',)
class Name(models.Model):
name=models.CharField(max_length=200)
role=models.ForeignKey(Role,on_delete=models.CASCADE)
def __str__(self):
return self.name
class Meta:
ordering = ('name',)
class Address(models.Model):
I can acces the manyTomany field from persons and roles but I cannot access names.
the template:
{% extends "artdb/base.html" %}
{% block content1 %}
<ul>
{% for p in ans %}
<h5>First name: {{p.firstName}}</h5>
<h5>Last name: {{p.lastName}}</h5>
<h5>Phone: {{p.phoneNumber}}</h5>
<h5>Adress: {{p.streetAdress}}</h5>
<h5>Zip Code: {{p.zipcode}}</h5>
<h5>City: {{p.city}}</h5>
<hr>
{% endfor %}
</ul>
{% endblock content1 %}
{% block content2 %}
<ul>
{% for p in ans %}
{% for r in p.role_set.all %}
<h5>{{ r.role }}</h5>
{% endfor %}
{% endfor %}
<hr>
</ul>
{% endblock content2 %}
{% block content3 %}
<ul>
{% for p in ans %}
{% for r in p.role_set.all %}
<h5>{{ r.name }}</h5>
{% endfor %}
{% endfor %}
<hr>
</ul>
{% endblock content3 %
I konow that I have to iterate to get manyTomany, but is it the same with oneTomany?
how do I access Names from Persons via Role?
}

Answer 1

here is the solution for those interested. (thanks daniel roseman). Iterate through every relation. Here the first relation is many to many and the second many to one:
{% block content3 %}
<ul>
{% for p in ans %}
{% for r in p.role_set.all %}
{% for n in r.name_set.all %}
<h5>{{ n }}</h5>
{% endfor %}
{% endfor %}
{% endfor %}
<hr>
</ul>
{% endblock content3 %}