Django form class and view class connected - django

Question

Hi in my code(not written by me) i have django form class and views class. I dont know how this is connected each other. Can anyone tell me how this is connected? Also can any one please tell me how this messege : Credential is in use by {0} collections that are turned on and "
"{1} collections that are turned off. Be mindful that over-using " "credentials may result in collecting being rate limited by the " "social media API is displayed, i mean if i need to change the alignment of this text where i should change?
My code classes are :
from forms.py :
class CollectionTwitterSearch2Form(BaseCollectionForm):
incremental = forms.BooleanField(initial=True, required=False, label=INCREMENTAL_LABEL, help_text=INCREMENTAL_HELP)
def __init__(self, *args, **kwargs):
super(CollectionTwitterSearch2Form, self).__init__(*args, **kwargs)
self.helper.layout[0][5].extend(('incremental',))
if self.instance and self.instance.harvest_options:
harvest_options = json.loads(self.instance.harvest_options)
if "incremental" in harvest_options:
self.fields['incremental'].initial = harvest_options["incremental"]
def save(self, commit=True):
m = super(CollectionTwitterSearch2Form, self).save(commit=False)
m.harvest_type = Collection.TWITTER_SEARCH_2
harvest_options = {
"incremental": self.cleaned_data["incremental"],
}
m.harvest_options = json.dumps(harvest_options, sort_keys=True)
m.save()
return m
from views.py :
def _get_credential_use_map(credentials, harvest_type):
credential_use_map = {}
if harvest_type in Collection.RATE_LIMITED_HARVEST_TYPES:
for credential in credentials:
active_collections = 0
inactive_collections = 0
for collection in credential.collections.all():
if collection.is_on:
active_collections += 1
else:
inactive_collections += 1
if active_collections == 0 and inactive_collections == 0:
credential_use_map[credential.id] = ("", "")
else:
credential_use_map[credential.id] = ("warning",
"Credential is in use by {0} collections that are turned on and "
"{1} collections that are turned off. Be mindful that over-using "
"credentials may result in collecting being rate limited by the "
"social media API.".format(active_collections,
inactive_collections))
return credential_use_map
class CollectionCreateView(LoginRequiredMixin, CollectionSetOrSuperuserPermissionMixin, SuccessMessageMixin,
CreateView):
model = Collection
template_name = 'ui/collection_create.html'
def get_initial(self):
initial = super(CollectionCreateView, self).get_initial()
initial["collection_set"] = CollectionSet.objects.get(pk=self.kwargs["collection_set_pk"])
return initial
def get_context_data(self, **kwargs):
context = super(CollectionCreateView, self).get_context_data(**kwargs)
context["collection_set"] = CollectionSet.objects.get(pk=self.kwargs["collection_set_pk"])
harvest_type = self.kwargs["harvest_type"]
context["harvest_type_name"] = _get_harvest_type_name(harvest_type)
credentials = _get_credential_list(self.kwargs["collection_set_pk"], harvest_type)
context["credentials"] = credentials
context["credential_use_map"] = _get_credential_use_map(credentials, harvest_type)
context["platform"] = Collection.HARVEST_TYPES_TO_PLATFORM[self.kwargs["harvest_type"]]
return context
def get_form_kwargs(self):
kwargs = super(CollectionCreateView, self).get_form_kwargs()
kwargs["coll"] = self.kwargs["collection_set_pk"]
kwargs['credential_list'] = _get_credential_list(self.kwargs["collection_set_pk"], self.kwargs["harvest_type"])
return kwargs
def get_form_class(self):
return getattr(forms, _get_collection_form_class(self.kwargs["harvest_type"]))
def get_success_url(self):
return reverse('collection_detail', args=(self.object.pk,))
def get_success_message(self, cleaned_data):
if self.object.required_seed_count() != 0:
return "New collection added. You can now add seeds."
return "New collection added."
Full code is here in this git : https://github.com/gwu-libraries/sfm-ui/tree/master/sfm/ui
It would be great anyone can explain how these two classes and template is connected and how the messege is displayed

Answer 1

The CollectionCreateView class is conected to the Form using the function get_form_class, this function is called by default by the CreateView, in there you can see is calling _get_collection_form_class() and as an argument is passing self.kwargs['harvest_type'] this kwargs is comming from the url declaration. The _get_collection_form_class function is returning the CollectionTwitterSearch2Form when the harvest_type is something like TwitterSearch2. The template is given by the template_name = 'ui/collection_create.html' again this is the default vehaviour. And finally for the message this is using SuccessMessageMixin.