Call object in template after _meta.get_fields()

问题

So I have lots of models with relations to the parent model. Like this

class Part(models.Model):
    name = models.CharField(max_length=550)

class Stock(models.Model):
    name = models.CharField(max_length=550)

class StockArea(models.Model):
    area = models.CharField(max_length=550)
    stock = models.ManyToManyField(Stock, related_name='stockarea_stock')

class Si(models.Model):
    name = models.CharField(max_length=50)
    si_unit = models.CharField(max_length=10)

class Quantity(models.Model):
    quantity = models.DecimalField(max_digits=10, decimal_places=2)
    si = models.ManyToManyField(Si, related_name='quantity_si')
    part = models.ManyToManyField(Part, related_name='quantity_part')
    stockarea = models.ManyToManyField(StockArea, related_name='quantity_stockarea')

class Image(models.Model):
    image = models.FileField()
    part = models.ManyToManyField(Part, related_name='image_part')

When I want to have a detail view of a part, I want to show Name of part, Quantity, Image, stockarea etc.

So the viw looks like this for the detail view

def details(request, part_id):
    part = get_object_or_404(Part, pk=part_id)
    part = part._meta.get_fields()
    context = {
        'part': part,
    }
    return render(request, 'part/details.html', context)

The problem comes when trying to call for everything in the template.

I can show object with calling just part: {{ part }}

But I want to be able to call the name of the part, like: {{ part.name }}

I understand this would be troublesome since related fields also are called 'name'. So I thought I was gonna be able to call it like this: {{ part.Part.name }} or when I want to show quantity: {{ part:Quantity.quantity }}

None is working. So my question is, how do I call the data from the object?

Thanks!

回答1:

The part object you get is a model instance. You can use it as a model instance. So this just works:

{% for image_object in part.image_part.all %}
    <img src="{{ image_object.image.url }}" />
{% endfor %}

That is, after your remove this line:

part = part._meta.get_fields()

There's no reason whatsoever to do that. The occasions that you need access to _meta are rare.

来源：https://stackoverflow.com/questions/46319220/call-object-in-template-after-meta-get-fields

标签

python

django

django-models

django-templates