Dear Django-users.
I'm slowly working towards a Django "data-warehouse" framework, where I can
easily add a lot of models (each containing a table with data), while
sticking to only few reusable views.
I've realised that in urls.py, it is possible to specify the model on which
the UpdateView is going to do its magic.
This allows me to use a generic UpdateView (which I called ItemUpdateView)
and template for all my models, which will save me a ton of almost
identical lines of code.
However, in the generic ItemUpdateView, I of course need to specify the
fields of the specific model chosen in urls.py.
As I ideally only want a few generic views (i.e. ItemCreateView,
ItemUpdateView, ItemDeleteView and ItemListView), I've chosen to place the
field array in my model definition, hoping to be able to access it from my
generic Class Based Views
But how do I access the model attribute in (Item)UpdateView
thanks, Mikkel
>From views.py
from django.views.generic import CreateView, ListView, UpdateView,
DeleteView
class ItemUpdateView(UpdateView):
template_name = "item_form.html"
# How do I access the model attribute of ItemUpdateView as given in urls.py?
# This line below returns the error "NameError: name 'model' not defined"
fields = model.fields
>From urls.py
from django.urls import path
from . views import ItemUpdate
from . models import Region, Location
# Awesome! I can specify the model to be used by ItemUpdateView
urlpatterns = [
path('update/region/<pk>', ItemUpdateView.as_view(model=Region),
name='region_update'),
path('update/location/<pk>', ItemUpdateView.as_view(model=Location),
name='location_update'),
]
>From models.py (Region and Location are only two of my tables, I'd like to
have say 20 or 30 models
from django.db import models
# Abstract class for our items including common methods, data and
definitions
class ItemModel(models.Model):
fields = [ 'label', 'short', 'descr' ]
label = models.CharField(max_length=10)
short = models.CharField(max_length=15)
descr = models.CharField(max_length=40)
def __str__(self):
return self.short
class Meta:
abstract = True
class Region(ItemModel):
fields = [ 'label', 'short', 'descr' ]
class Location(ItemModel):
fields = [ 'label', 'short', 'descr', 'region' ]
region = models.ForeignKey(Region, on_delete=models.CASCADE)
class Plant(ItemModel):
fields = [ 'label', 'short', 'descr', 'location', 'capex', 'opex',
'capacity' ]
location= models.ForeignKey(Location, on_delete=models.CASCADE)
capex = models.DecimalField(decimal_places=3, max_digits=8)
opex = models.DecimalField(decimal_places=3, max_digits=8)
capacity= models.DecimalField(decimal_places=3, max_digits=8)
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