Hi All,
I'm finding myself creating more and more fields in a model to keep my
templates clean. Since it's merely temporary calculated data, and not data to
store permanently it feels like the wrong place. An example:
I have a product model (child object of an order model). The product has a
'per_price' and 'amount' field that get filled by the user. I gave the product
an extra field called 'total_price' where I store 'amount * per_price' just
before my view and my template come together. This way all that's needed to
display an invoice is in the objects list.
Calculating this in the template also doesn't seem the way. For MVC's sake I
belief this belongs in the view, but then it's to late (read: there's no field
on the object) to store temporary stuff.
The Q: How does one relate temporary data to objects in a list, before it's
rendered in a template?
Thanx a lot,
Gerard.
Some source snippets if it's not clear:
# ---- Model
class Product(models.Model):
per_price = models.DecimalField('Product price', max_digits=15,
decimal_places=2)
total_price = models.DecimalField('Calculated', max_digits=15,
decimal_places=2, editable=False, null=True)
amount = models.IntegerField('#', max_length=10)
# ---- View
def download_order(request, order_id):
for p in product_list:
# Calculate product totals
p.total = Decimal(p.amount * p.per_price)
# ---- Template
{% for product in product_list %}
<tr class="{% cycle 'row1' 'row2' %}">
<td>{{ product.name }}</td>
<td>{{ product.description }}</td>
<td>{{ product.total }}</td>
--
urls = { 'fun': 'www.zonderbroodje.nl', 'tech': 'www.gp-net.nl' }
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