Adding content to each view(base_site.html) in Django Admin

Question

I want to pass a list of object to my custom template in Djando admin, delete_view and change_view. I modified base_site.html for including a nav-bar and I want to pass, from view, a list of objects to the nav-bar.

I did it before for django admin index, changelist_view and add_view as well. I override those function and add the extra content I want.

But I can´t do it in the two firts. The idea should be this one:

@csrf_protect_m
@transaction.atomic
def delete_view(self, request, object_id, extra_context=None):
    extra_context = extra_context or {}                 
    mygetModels = getModels()
    extra_context["modelsTables"] = mygetModels.getTablesModels()
    return super(table_NameAdmin, self).delete_view(request, object_id, extra_context)

As I said that works before in changelist_view, index and add_view. But is not working in delete_view and change_view.

Try writing a [custom template tag](https://docs.djangoproject.com/en/1.9/howto/custom-template-tags/#simple-tags), and include it in your admin template. That way, you won't have to override every single admin view just to add some items to the template context. — Alasdair, Apr 05 '16 at 08:39
Well... Looks better indeed. So I define my function as: @register.simple_tag def getTablesModels(self): Classes = apps.apps.get_models(ddbb) modelClasses = [] for i in xrange(len(Classes)): obj = dbModels(Classes[i].__name__.lower(), Classes[i]._meta.db_table) modelClasses += [obj] return modelClasses How I call it on My index admin template? Should I import something? I need to go through all list which this tag is returning {% for item in modelsTables %}
Please don't post code in the comments, it's impossible to read. — Alasdair, Apr 05 '16 at 08:58
Hahahaha... lol. Your right. My fault... Anyway, your second approach is better. Cleaner, smarter,... Thanks Alasdair. — Kenzo_Gilead, Apr 05 '16 at 09:09

score 6 · Accepted Answer · answered Apr 05 '16 at 08:57

6

From the code you have posted, I'm not sure why your delete_view isn't working. I suggest a different approach to add items to the context.

Try overriding your admin site's each_context method. This avoids having to override multiple model admin methods.

def each_context(self, request):
    context = super(MyAdminSite, self).each_context(request)
    context['extra_var'] = 'Extra variable'
    return context

If you wanted to use these variables in templates outside of the Django admin, you could write a custom template tag or context processor.

If you are using Django 1.9+, you can use the simple_tag decorator to save the result of the tag to a variable.

{% getTablesModels as modelsTables %}

Then you can use the variable in the template

{% for item in modelsTables %}

answered Apr 05 '16 at 08:57

Alasdair

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That is what I want. You did it again Alasdair... ;). Thanks Mate. – Kenzo_Gilead Apr 05 '16 at 09:09
What's a good common place to write this `each_context()` override function? – Nitin Nain Apr 25 '20 at 09:02
1

@NitinNain it’s up to you. The example [in the docs](https://docs.djangoproject.com/en/3.0/ref/contrib/admin/#overriding-the-default-admin-site) puts the custom site in `my project/admin.py` (next to `settings.py`). – Alasdair Apr 25 '20 at 12:01
@NitinNain, I'd use /sites.py, cause this is where it is defined originally (admin/sites.py) – Agoun Sep 24 '20 at 10:08

Adding content to each view(base_site.html) in Django Admin

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