Improve filters in Skill Admin

config/settings.py

@@ -42,6 +42,7 @@ INSTALLED_APPS = [
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
+    'django_admin_listfilter_dropdown',
     'django_extensions',
     "ultron.core",
     'ultron.location',

requirements/base.txt

@@ -1,6 +1,7 @@
 Django==3.2.8
 django-environ==0.8.1
 django-extensions==3.1.3
+django-admin-list-filter-dropdown==1.0.3
 Markdown==3.3.4
 pendulum==2.1.2
 simplejson==3.17.5

ultron/objective/admin.py

@@ -2,6 +2,12 @@ from django.contrib import admin
 
 from django_extensions.admin import ForeignKeyAutocompleteAdmin
 
+from django_admin_listfilter_dropdown.filters import (
+    DropdownFilter,
+    ChoiceDropdownFilter,
+    RelatedDropdownFilter
+)
+
 from .models import TouchPosition, Skill, Routine, RoutineSkill
 
 
@@ -64,13 +70,13 @@ class SkillAdmin(ForeignKeyAutocompleteAdmin):
     search_fields = ("rank", "long_label", "short_label")
     list_filter = (
         "is_competitive",
-        "difficulty",
-        "departure",
-        "landing",
-        "level",
-        "rank",
-        "rotation_type",
-        "rotation",
+        ('difficulty', DropdownFilter),
+        ('departure', RelatedDropdownFilter),
+        ('landing', RelatedDropdownFilter),
+        ('level', DropdownFilter),
+        ('rank', DropdownFilter),
+        'rotation_type',
+        ('rotation', DropdownFilter),
     )
 
     filter_horizontal = ("educatives", "prerequisites")