Fixed #10743 -- Allowed lookups for related fields in ModelAdmin.list_display.

Co-authored-by: Alex Garcia <me@alexoteiza.com>
Co-authored-by: Natalia <124304+nessita@users.noreply.github.com>
Co-authored-by: Nina Menezes <https://github.com/nmenezes0>

3 files changed, 20 insertions, 9 deletions

diff --git a/docs/ref/checks.txt b/docs/ref/checks.txt
index f0eeaca268..cf0ab32efa 100644
--- a/docs/ref/checks.txt
+++ b/docs/ref/checks.txt
@@ -726,9 +726,9 @@ with the admin site:
 * **admin.E106**: The value of ``<InlineModelAdmin class>.model`` must be a
   ``Model``.
 * **admin.E107**: The value of ``list_display`` must be a list or tuple.
-* **admin.E108**: The value of ``list_display[n]`` refers to ``<label>``,
-  which is not a callable, an attribute of ``<ModelAdmin class>``, or an
-  attribute or method on ``<model>``.
+* **admin.E108**: The value of ``list_display[n]`` refers to ``<label>``, which
+  is not a callable or attribute of ``<ModelAdmin class>``, or an attribute,
+  method, or field on ``<model>``.
 * **admin.E109**: The value of ``list_display[n]`` must not be a many-to-many
   field or a reverse foreign key.
 * **admin.E110**: The value of ``list_display_links`` must be a list, a tuple,
diff --git a/docs/ref/contrib/admin/index.txt b/docs/ref/contrib/admin/index.txt
index e85ba9c36a..e0e57b9fc0 100644
--- a/docs/ref/contrib/admin/index.txt
+++ b/docs/ref/contrib/admin/index.txt
@@ -315,9 +315,9 @@ subclass::
     For more complex layout needs, see the :attr:`~ModelAdmin.fieldsets` option.
 
     The ``fields`` option accepts the same types of values as
-    :attr:`~ModelAdmin.list_display`, except that callables aren't accepted.
-    Names of model and model admin methods will only be used if they're listed
-    in :attr:`~ModelAdmin.readonly_fields`.
+    :attr:`~ModelAdmin.list_display`, except that callables and ``__`` lookups
+    for related fields aren't accepted. Names of model and model admin methods
+    will only be used if they're listed in :attr:`~ModelAdmin.readonly_fields`.
 
     To display multiple fields on the same line, wrap those fields in their own
     tuple. In this example, the ``url`` and ``title`` fields will display on the
@@ -565,7 +565,7 @@ subclass::
     If you don't set ``list_display``, the admin site will display a single
     column that displays the ``__str__()`` representation of each object.
 
-    There are four types of values that can be used in ``list_display``. All
+    There are five types of values that can be used in ``list_display``. All
     but the simplest may use the  :func:`~django.contrib.admin.display`
     decorator, which is used to customize how the field is presented:
 
@@ -574,6 +574,11 @@ subclass::
           class PersonAdmin(admin.ModelAdmin):
               list_display = ["first_name", "last_name"]
 
+    * The name of a related field, using the ``__`` notation. For example::
+
+          class PersonAdmin(admin.ModelAdmin):
+              list_display = ["city__name"]
+
     * A callable that accepts one argument, the model instance. For example::
 
           @admin.display(description="Name")
@@ -614,6 +619,11 @@ subclass::
           class PersonAdmin(admin.ModelAdmin):
               list_display = ["name", "decade_born_in"]
 
+    .. versionchanged:: 5.1
+
+        Support for using ``__`` lookups was added, when targeting related
+        fields.
+
     A few special cases to note about ``list_display``:
 
     * If the field is a ``ForeignKey``, Django will display the
@@ -831,7 +841,7 @@ subclass::
     * Django will try to interpret every element of ``list_display`` in this
       order:
 
-      * A field of the model.
+      * A field of the model or from a related field.
       * A callable.
       * A string representing a ``ModelAdmin`` attribute.
       * A string representing a model attribute.
diff --git a/docs/releases/5.1.txt b/docs/releases/5.1.txt
index 1d014ceb21..701d686532 100644
--- a/docs/releases/5.1.txt
+++ b/docs/releases/5.1.txt
@@ -32,7 +32,8 @@ Minor features
 :mod:`django.contrib.admin`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-* ...
+* :attr:`.ModelAdmin.list_display` now supports using ``__`` lookups to list
+  fields from related models.
 
 :mod:`django.contrib.admindocs`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~