Render foreign key __str__ method in a template django
Render foreign key __str__ method in a template django
class A(models.Model):
field1 = models.CharField(max_length=10)
field2 = models.IntegerField(default=0)
def __str__(self):
return self.field1 + str(self.field2)
class B(models.Model):
a = models.ForeignKey(A)
...
Now in a template I want to render the "a" attribute of an instance of model B by using: binstance.a but this seems to either render empty string or nothing at all.
binstance.a
How do I render the str methdod of a foreign key within the template?
I want to be able to print string representation of foreign key attribute in an easy manner. I don't want to put binstance.a.field1 binstance.a.field2 in the template, I'd rather have a compact representation of model A instance accessible by rendering the instance of A using ainstance in the template
– user3142434
Sep 8 '18 at 10:12
I am not sure, but I don't think django provide this way in template. Although you can think of reverse foreign key n template
– Atul Kumar
Sep 8 '18 at 10:19
2 Answers
2
Actually it's default django behaviour. Check do you pass B instance with template context and use correct variable name in your template.
B
Yes! I was passing B.objects.all().values() to the template instead of B.objects.all(). Thanks!
– user3142434
Sep 8 '18 at 10:43
Maybe would I choose a different approach and create a template tag
@register.filter(name='fullname')
def fullname(pk):
b = B.objects.get(pk=pk)
field1 = b.a.first_name
field2 = b.a.last_name
return " ".format(field1, field2)
Then you can use binstance.pk
binstance.pk
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do you want to print field1 and field2 using "a" attribute ?
– Atul Kumar
Sep 8 '18 at 10:05