Added chapter for removing delete button

docs/add_actions.rst

@@ -2,10 +2,10 @@ How to add additional actions in Django admin?
 +++++++++++++++++++++++++++++++++++++++++++++++
 
 Django admin allows you to add additional actions which allow you to do bulk actions.
-You have been asked to add an action which will mark multiple :code:`Hero`s as immortal.
+You have been asked to add an action which will mark multiple :code:`Hero` s as immortal.
 
 You can do this by adding action a method to ModelAdmin
-and adding the method as string to :code:`actions`::
+and adding the method as string to :code:`actions` ::
 
     actions = ["mark_immortal"]
 

docs/remove_add_delete.rst

@@ -1,2 +1,23 @@
 How to remove the 'Add'/'Delete' button for a model?
 ====================================================
+
+
+The UMSRA management has added all the Category and Origin objects and wants to disable any further addition and deletion.
+They have asked you to disable 'Add' and 'Delete' buttons. You can do this by overriding the
+:code:`has_add_permission` and :code:`has_delete_permission` in the Django admin.::
+
+
+
+    def has_add_permission(self, request):
+        return False
+
+    def has_delete_permission(self, request, obj=None):
+        return False
+
+
+With these changes, the admin looks like this
+
+.. image:: remove_add_perms.png
+
+Note the removed `Add` buttons. The add and delete buttons also get removed from the detail pages. You can also read :doc:`remove_delete_selected`.
+

docs/remove_delete_selected.rst

@@ -16,3 +16,5 @@ We can remove it form the dropdown. Your code looks like this with the changes.:
 And your admin looks like this
 
 .. image:: export_selected.png
+
+You should also read :doc:`remove_add_delete`.

heroes_and_monsters/entities/admin.py

@@ -75,11 +75,23 @@ class VillainAdmin(admin.ModelAdmin, ExportCsvMixin):
 class CategoryAdmin(admin.ModelAdmin):
     list_display = ("name",)
 
+    def has_add_permission(self, request):
+        return False
+
+    def has_delete_permission(self, request, obj=None):
+        return False
+
 
 @admin.register(Origin)
 class OriginAdmin(admin.ModelAdmin):
     list_display = ("name", "hero_count", "villain_count")
 
+    def has_add_permission(self, request):
+        return False
+
+    def has_delete_permission(self, request, obj=None):
+        return False
+
     def get_queryset(self, request):
         queryset = super().get_queryset(request)
         queryset = queryset.annotate(