access to data ManyToMany django template - django

Question

I try to display a menu category ---> Subcategory ---> products.
I use a context_processor to display all the categories and submenus .
I need to get products based on category and subcategory
I can only display django.db.models.fields.related.ManyRelatedManager at object ....
class Categorias(models.Model):
nome_categoria = models.CharField(max_length=100)
class Subcategoria(models.Model):
nome_subcategoria = models.CharField(max_length=100)
class Product(models.Model):
categoria = models.ManyToManyField('Categorias')
subcategoria = models.ManyToManyField('Subcategoria')
context.py
def menu(request):
return {'menucategoria': Categorias.objects.all(),}
def submenu(request):
return {'submenu': Subcategoria.objects.all(),}
menu.html
{% for c in menucategoria %}
<ul>
<li class="block">
<input type="checkbox" name="item" id="{{c.id}}" />
<label for="{{c.id}}">{{c}}</label>
<ul class="options">
{% for p in produtos.subcategoria.all %}
<li>{{p}}</li>
{% endfor %}
</ul>
</li>
</ul>
{% endfor %}

Answer 1

{% for p in produtos.subcategoria.all %}
In Python you would get a TypeError: 'Manager' object is not iterable exception, but in templates if fails silently...
There are some more tweaks to be done... You seem to got it wrong with the related_name. Related name is used for reversing relationships, not following them. So probably this is what you're after:
class Categoria(models.Model): # singular!
nome_categoria = models.CharField(max_length=100)
class Subcategoria(models.Model):
nome_subcategoria = models.CharField(max_length=100)
class Product(models.Model):
# using ForeignKey instead of ManyToMany. Guessed so because "categoria" is singular, right?
categoria = models.ForeignKey('Categoria', related_name='produtos') # plural in related_name, and "products" not "category"
subcategoria = models.ForeignKey('Subcategoria', related_name='produtos') # plural in related_name, and "products" not "category"
Now you can do stuff like:
{% for p in categoria.produtos.all %}
somestuff...
{% for sc in p.subcategoria.all %}
somemorestuff...
P.S.
You can leave out the related_name altogether. A default related name will be used: product_set in this example.