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Using form_valid to Customise a CreateView
Next we have a crack at the viewwe use to create a brand new list, currently the
new_list
function. Here’s what it looks like now:
lists/views.py.
def
new_list
(
request
):
form
=
ItemForm
(
data
=
request
.
POST
)
if
form
.
is_valid
():
list
=
List
.
objects
.
create
()
form
.
save
(
for_list
=
list_
)
return
redirect
(
list_
)
else
:
return
render
(
request
,
'home.html'
, {
"form"
:
form
})
Looking through the possible CBGVs, we probably want a
CreateView
, and we know
we’re using the
ItemForm
class, so let’s see how we get on with them, and whether the
tests will help us:
lists/views.py (ch31l003).
from
django.views.generic
import
FormView
,
CreateView
[
...
]
class
NewListView
(
CreateView
):
form_class
=
ItemForm
def
new_list
(
request
):
[
...
]
I’m going to leave the old view function in
views.py
, so that we can copy code across
from it. We can delete it once everything is working. It’s harmless as soon as we switch
over the URL mappings, this time in:
lists/urls.py (ch31l004).
from
django.conf.urls
import
patterns
,
url
from
lists.views
import
NewListView
urlpatterns
=
patterns
(
''
,
url
(
r'^(\d+)/$'
,
'lists.views.view_list'
,
name
=
'view_list'
),
url
(
r'^new$'
,
NewListView
.
as_view
(),
name
=
'new_list'
),
)
Now running the tests gives three errors:
$
python3 manage.py test lists
ERROR: test_for_invalid_input_passes_form_to_template
(lists.tests.test_views.NewListTest)
django.core.exceptions.ImproperlyConfigured: TemplateResponseMixin requires
either a definition of 'template_name' or an implementation of
'get_template_names()'
ERROR: test_for_invalid_input_renders_home_template (lists.tests.test_views.NewListTest)
django.core.exceptions.ImproperlyConfigured: TemplateResponseMixin requires
either a definition of 'template_name' or an implementation of
Using form_valid to Customise a CreateView
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