Replaced Options.object_name.lower() by Options.model_name.

Thanks Simon for the suggestion.

Also removed inappropriate lowercasing of app labels in migrations.
Unlike model names, they are case sensitive.

django/contrib/admin/templates/admin/auth/user/change_password.html

@@ -6,7 +6,7 @@
 <script type="text/javascript" src="{% url 'admin:jsi18n' %}"></script>
 {% endblock %}
 {% block extrastyle %}{{ block.super }}<link rel="stylesheet" type="text/css" href="{% static "admin/css/forms.css" %}" />{% endblock %}
-{% block bodyclass %}{{ opts.app_label }}-{{ opts.object_name.lower }} change-form{% endblock %}
+{% block bodyclass %}{{ opts.app_label }}-{{ opts.model_name }} change-form{% endblock %}
 {% if not is_popup %}
 {% block breadcrumbs %}
 <div class="breadcrumbs">

django/contrib/admin/templates/admin/change_form.html

@@ -10,7 +10,7 @@
 
 {% block coltype %}colM{% endblock %}
 
-{% block bodyclass %}app-{{ opts.app_label }} model-{{ opts.object_name.lower }} change-form{% endblock %}
+{% block bodyclass %}app-{{ opts.app_label }} model-{{ opts.model_name }} change-form{% endblock %}
 
 {% if not is_popup %}
 {% block breadcrumbs %}

django/contrib/admin/templates/admin/change_list.html

@@ -32,7 +32,7 @@
 {% endif %}{% endif %}
 {% endblock %}
 
-{% block bodyclass %}app-{{ opts.app_label }} model-{{ opts.object_name.lower }} change-list{% endblock %}
+{% block bodyclass %}app-{{ opts.app_label }} model-{{ opts.model_name }} change-list{% endblock %}
 
 {% if not is_popup %}
 {% block breadcrumbs %}

django/contrib/admin/templates/admin/delete_confirmation.html

@@ -1,7 +1,7 @@
 {% extends "admin/base_site.html" %}
 {% load i18n admin_urls %}
 
-{% block bodyclass %}app-{{ opts.app_label }} model-{{ opts.object_name.lower }} delete-confirmation{% endblock %}
+{% block bodyclass %}app-{{ opts.app_label }} model-{{ opts.model_name }} delete-confirmation{% endblock %}
 
 {% block breadcrumbs %}
 <div class="breadcrumbs">

django/contrib/admin/templates/admin/delete_selected_confirmation.html

@@ -1,7 +1,7 @@
 {% extends "admin/base_site.html" %}
 {% load i18n l10n admin_urls %}
 
-{% block bodyclass %}app-{{ opts.app_label }} model-{{ opts.object_name.lower }} delete-confirmation delete-selected-confirmation{% endblock %}
+{% block bodyclass %}app-{{ opts.app_label }} model-{{ opts.model_name }} delete-confirmation delete-selected-confirmation{% endblock %}
 
 {% block breadcrumbs %}
 <div class="breadcrumbs">

django/contrib/admindocs/templates/admin_doc/model_index.html

@@ -27,7 +27,7 @@
 <table class="xfull">
 {% for model in group.list %}
 <tr>
-<th><a href="{% url 'django-admindocs-models-detail' app_label=model.app_label model_name=model.object_name.lower %}">{{ model.object_name }}</a></th>
+<th><a href="{% url 'django-admindocs-models-detail' app_label=model.app_label model_name=model.model_name %}">{{ model.object_name }}</a></th>
 </tr>
 {% endfor %}
 </table>

django/db/migrations/autodetector.py

@@ -71,9 +71,9 @@ class MigrationAutodetector(object):
             for field in new_apps.get_model(app_label, model_name)._meta.local_fields:
                 if field.rel:
                     if field.rel.to:
-                        related_fields.append((field.name, field.rel.to._meta.app_label.lower(), field.rel.to._meta.object_name.lower()))
+                        related_fields.append((field.name, field.rel.to._meta.app_label, field.rel.to._meta.model_name))
                     if hasattr(field.rel, "through") and not field.rel.though._meta.auto_created:
-                        related_fields.append((field.name, field.rel.through._meta.app_label.lower(), field.rel.through._meta.object_name.lower()))
+                        related_fields.append((field.name, field.rel.through._meta.app_label, field.rel.through._meta.model_name))
             if related_fields:
                 pending_add[app_label, model_name] = related_fields
             else:

django/db/migrations/state.py

@@ -152,7 +152,7 @@ class ModelState(object):
                     options[name] = model._meta.original_attrs[name]
         # Make our record
         bases = tuple(
-            ("%s.%s" % (base._meta.app_label, base._meta.object_name.lower()) if hasattr(base, "_meta") else base)
+            ("%s.%s" % (base._meta.app_label, base._meta.model_name) if hasattr(base, "_meta") else base)
             for base in model.__bases__
             if (not hasattr(base, "_meta") or not base._meta.abstract)
         )

django/db/models/fields/related.py

@@ -1278,7 +1278,7 @@ class ForeignKey(ForeignObject):
     def __init__(self, to, to_field=None, rel_class=ManyToOneRel,
                  db_constraint=True, **kwargs):
         try:
-            to._meta.object_name.lower()
+            to._meta.model_name
         except AttributeError:  # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT
             assert isinstance(to, six.string_types), "%s(%r) is invalid. First parameter to ForeignKey must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT)
         else: