Please help me with CBV template_name behaviour.

[JoeCodeswell]

Dear django-users,

In an effort ot learn Django, i am writing a blog post, "Simple Django 
Tutorial 
<https://joecodeswell.wordpress.com/2016/05/19/simple-django-tutorial/#untested>",
 
to remind myself & possibly others of some Django Basics.

I ALMOST finished when i noticed some strange (to me) behaviour of the 
`template_name` in a CBV.

Here are the relevant CBVs:

class SimpleSearchListContactView(ListView):

    model = Contact
    template_name = 'contacts/contact_list.html'    
    def get_queryset(self):
        qs = super(SimpleSearchListContactView, self).get_queryset()
        
        return qs.filter(first_name__contains=self.kwargs['fname'])
        # "first_name" is the first_name field in our Contacts model
        # "contains" is one of Django's "Field lookups"
        # "'fname'" is passed in from our url <fname> Regex Named Group  
    
    
class ParametricSearchListContactView(ListView):
    model = Contact
    template_name = 'contacts/contact_list.html'

    def get_queryset(self):
        qs = super(ParametricSearchListContactView, self).get_queryset()
        field_lookups_dict = {
            '%s__%s'%(self.kwargs['field_name'], self.kwargs['match_cmd']):
self.kwargs['value'],
            # for a def of each match_cmd see Field lookups - 
https://docs.djangoproject.com/en/1.9/ref/models/querysets/#field-lookups
        }
        print ("ParametricSearchListContactView")
        print (ParametricSearchCRUDListContactView.template_name)
        print (ParametricSearchListContactView.template_name)
        print (ListView.template_name)
        return qs.filter(**field_lookups_dict)
    
    
class SimpleSearchCRUDListContactView(ListView):

    model = Contact
    template_name = 'contacts/crudlist.htm'    
    
    def get_queryset(self):
        qs = super(SimpleSearchCRUDListContactView, self).get_queryset()
        
        return qs.filter(first_name__contains=self.kwargs['fname'])
        # "first_name" is the first_name field in our Contacts model
        # "contains" is one of Django's "Field lookups"
        # "'fname'" is passed in from our url <fname> Regex Named Group  
    
    
class ParametricSearchCRUDListContactView(ListView):
    model = Contact
    template_name = 'contacts/crudlist.htm'
    

    def get_queryset(self):
        qs = super(ParametricSearchCRUDListContactView, self).get_queryset()
        field_lookups_dict = {
            '%s__%s'%(self.kwargs['field_name'], self.kwargs['match_cmd']):
self.kwargs['value'],
            # for a def of each match_cmd see Field lookups - 
https://docs.djangoproject.com/en/1.9/ref/models/querysets/#field-lookups
        }
        print ("ParametricSearchCRUDListContactView")
        print (ParametricSearchCRUDListContactView.template_name)
        print (ParametricSearchListContactView.template_name)
        print (ListView.template_name)

        return qs.filter(**field_lookups_dict)
    

    


The 2nd pair of classes are the *same as* the first pair EXCEPT:
 
    template_name = ‘contacts/crudlist.html’ NOT 
‘contacts/contact_list.html’
    Class names are new in 2 places in each class:
        “SimpleSearchCRUDListContactView”
        “ParametricSearchCRUDListContactView”


Here are the relevant URLs:

    url(r'^ssearch/(?P<fname>[\w-]+)/$', contacts.views.
SimpleSearchListContactView.as_view(), name='simplesearchlistcontactview', 
),
    url(r
'^psearch/(?P<field_name>[\w-]+)/(?P<match_cmd>[\w-]+)/(?P<value>[\w-]+)/$', 
contacts.views.ParametricSearchListContactView.as_view(), name=
'parametricsearchlistcontactview', ),
    
    url(r'^ssearchc/(?P<fname>[\w-]+)/$', contacts.views.
SimpleSearchCRUDListContactView.as_view(), name='ssearchc', ),
    url(r
'^psearchc/(?P<field_name>[\w-]+)/(?P<match_cmd>[\w-]+)/(?P<value>[\w-]+)/$'
, contacts.views.ParametricSearchCRUDListContactView.as_view(), name=
'psearchc', ),



*I EXPECT* the Views with CRUD in their names (CRUD Views) to behave THE 
SAME AS the others EXCEPT items are listed with read, update & delete 
links, because that is how `contacts/crudlist.htm` displays them.

*THE PROBLEM IS *that the CRUD Views display the items using the Plain 
Template (contacts/contact_list.html) NOT the CRUD Template (
'contacts/crudlist.htm')

I.E. Navigating to 
`http://127.0.0.1:8000/contacts/psearchc/last_name/contains/d/` 
*YIELDS *
Plain Contacts 
   
   - Joe Codeswell j...@j.com
   - Jayne Mansfield j...@thebomb.com

*NOT AS EXPECTED*
CRUD Contacts Create <http://127.0.0.1:8000/contacts/create> 
   
   - Joe Codeswell j...@j.com Read | <http://127.0.0.1:8000/contacts/read/1> 
Update 
   | <http://127.0.0.1:8000/contacts/update/1> Delete 
   <http://127.0.0.1:8000/contacts/delete/1> 
   - Jayne Mansfield j...@thebomb.com Read | 
   <http://127.0.0.1:8000/contacts/read/3> Update | 
   <http://127.0.0.1:8000/contacts/update/3> Delete 
   <http://127.0.0.1:8000/contacts/delete/3> 

Also, for the same navigation URL, in the Server Status Window the prints 
yield

[18/Jun/2016 11:16:26] "GET /contacts/psearchc/last_name/contains/d/ 
HTTP/1.1" 200 218
ParametricSearchCRUDListContactView
contacts/crudlist.htm
contacts/contact_list.html
None

I hope someone can tell me what's going on here.

Thanks in advance.

Love and peace,

Joe

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