Always include the username in search_fields

CHANGELOG.rst

@@ -6,6 +6,10 @@ Change log
 `Next version`_
 ~~~~~~~~~~~~~~~
 
+- Ensured that the username is part of ``search_fields`` for all models
+  registered with the admin interface.
+
+
 `0.3`_ (2018-09-21)
 ~~~~~~~~~~~~~~~~~~~
 

user_payments/admin.py

@@ -1,4 +1,5 @@
 from django.contrib import admin
+from django.contrib.auth import get_user_model
 
 from . import models
 
@@ -23,12 +24,16 @@ class PaymentAdmin(admin.ModelAdmin):
     )
     list_filter = ("charged_at", "payment_service_provider")
     raw_id_fields = ("user",)
-    search_fields = ("email", "transaction")
+    search_fields = (
+        "email",
+        "transaction",
+        "user__{}".format(get_user_model().USERNAME_FIELD),
+    )
 
 
 @admin.register(models.LineItem)
 class LineItemAdmin(admin.ModelAdmin):
     date_hierarchy = "created_at"
     list_display = ("user", "payment", "created_at", "title", "amount")
     raw_id_fields = ("user", "payment")
-    search_fields = ("title",)
+    search_fields = ("title", "user__{}".format(get_user_model().USERNAME_FIELD))

user_payments/user_subscriptions/admin.py

@@ -1,4 +1,5 @@
 from django.contrib import admin
+from django.contrib.auth import get_user_model
 
 from user_payments.exceptions import UnknownPeriodicity
 from . import models
@@ -24,10 +25,14 @@ class SubscriptionAdmin(admin.ModelAdmin):
         "paid_until",
         "renew_automatically",
     )
-    list_filter = ("renew_automatically",)
+    list_filter = ("renew_automatically", "code")
     radio_fields = {"periodicity": admin.HORIZONTAL}
     raw_id_fields = ("user",)
-    search_fields = ("title",)
+    search_fields = (
+        "title",
+        "code",
+        "user__{}".format(get_user_model().USERNAME_FIELD),
+    )
 
     def get_inline_instances(self, request, obj=None):
         if obj is None:
@@ -47,3 +52,6 @@ def save_model(self, request, obj, form, change):
 class SubscriptionPeriodAdmin(admin.ModelAdmin):
     list_display = ("subscription", "starts_on", "ends_on", "line_item")
     raw_id_fields = ("subscription", "line_item")
+    search_fields = [
+        "subscription__{}".format(field) for field in SubscriptionAdmin.search_fields
+    ]