Added fk display text

docs/fk_display.rst

@@ -1,2 +1,25 @@
 How to change ForeignKey display text in dropdowns?
 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+:code:`Hero` has a FK to :code:`Catgeory`. In the dropdown, rather than just the name, you want to show the text "Category: <name>".
+
+You can change the :code:`__str__` method on :code:`Category`, but you only want this change in the admin.
+You can do this by creating a subclassing :code:`forms.ModelChoiceField` with a custom :code:`label_from_instance`.::
+
+
+    class CategoryChoiceField(forms.ModelChoiceField):
+         def label_from_instance(self, obj):
+             return "Category: {}".format(obj.name)
+
+You can then override :code:`formfield_for_foreignkey` to use this field type for category.::
+
+
+    def formfield_for_foreignkey(self, db_field, request, **kwargs):
+        if db_field.name == 'category':
+            return CategoryChoiceField(queryset=Category.objects.all())
+        return super().formfield_for_foreignkey(db_field, request, **kwargs)
+
+Your admin look like this.
+
+
+.. image:: fk_display.png

heroes_and_monsters/entities/admin.py

@@ -61,6 +61,11 @@ class Meta:
         model = Hero
         exclude = ["category"]
 
+class CategoryChoiceField(forms.ModelChoiceField):
+     def label_from_instance(self, obj):
+         return "Category: {}".format(obj.name)
+
+
 
 @admin.register(Hero)
 class HeroAdmin(admin.ModelAdmin, ExportCsvMixin):
@@ -110,8 +115,12 @@ def children_display(self, obj):
     #         return []
 
     def formfield_for_foreignkey(self, db_field, request, **kwargs):
+        if db_field.name == 'category':
+            return CategoryChoiceField(queryset=Category.objects.all())
         return super().formfield_for_foreignkey(db_field, request, **kwargs)
 
+
+
     def get_urls(self):
         urls = super().get_urls()
         my_urls = [