Added edit mutiple models chapter

docs/changeview_readonly.rst

@@ -12,4 +12,4 @@ You can do this by::
 
 Your create form looks like this:
 
-.. image::changeview_readonly.png
+.. image:: changeview_readonly.png

docs/edit_multiple_models.rst

@@ -1,2 +1,25 @@
 How to edit mutiple models from one Django admin?
 =====================================================
+
+To be able to edit multiple objects from one Django admin, you need to use inlines.
+
+You have the :code:`Category` model, and you need to add and edit :code:`Villain` models inside the admin for Category. You can do::
+
+
+    class VillainInline(admin.StackedInline):
+        model = Villain
+
+    @admin.register(Category)
+    class CategoryAdmin(admin.ModelAdmin):
+        ..
+
+        inlines = [VillainInline]
+
+You can see the form to add and edit :code:`Villain` inside the :code:`Category` admin. If the Inline model has alot of fields,
+use :code:`StackedInline` else use :code:`TabularInline`.
+
+
+
+.. image:: edit_multiple_models.png
+
+

heroes_and_monsters/entities/admin.py

@@ -160,10 +160,16 @@ class VillainAdmin(admin.ModelAdmin, ExportCsvMixin):
 
     readonly_fields = ["added_on"]
 
+
+class VillainInline(admin.StackedInline):
+    model = Villain
+
 @admin.register(Category)
 class CategoryAdmin(admin.ModelAdmin):
     list_display = ("name",)
 
+    inlines = [VillainInline]
+
     def has_add_permission(self, request):
         return False
 

heroes_and_monsters/entities/models.py

@@ -99,6 +99,16 @@ class Villain(Entity):
     is_unique = models.BooleanField(default=True)
     count = models.PositiveSmallIntegerField(default=1)
 
+
+class HeroAcquaintance(models.Model):
+    "Non family contacts of a Hero"
+    hero = models.OneToOneField(Hero, on_delete=models.CASCADE)
+
+    friends = models.ManyToManyField(Hero, related_name="+")
+    detractors = models.ManyToManyField(Hero, related_name="+")
+    main_anatagonists = models.ManyToManyField(Villain, related_name="+")
+
+
 class AllEntity(models.Model):
     name = models.CharField(max_length=100)