Add __str__ methods to the member models

This makes the admin clearer in many places.

website/members/locale/nl/LC_MESSAGES/django.po

@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-08-19 15:27+0200\n"
-"PO-Revision-Date: 2018-08-19 15:27+0200\n"
+"POT-Creation-Date: 2018-08-31 17:06+0200\n"
+"PO-Revision-Date: 2018-08-31 17:10+0200\n"
 "Last-Translator: Thom Wiggers <thom@thomwiggers.nl>\n"
 "Language-Team: \n"
 "Language: nl\n"
@@ -364,6 +364,10 @@ msgstr ""
 msgid "A birthday cannot be in the future."
 msgstr "Een verjaardag kan niet in de toekomst liggen."
 
+#: models.py
+msgid "Profile for {}"
+msgstr "Profiel voor {}"
+
 #: models.py
 msgid "Member"
 msgstr "Lid"
@@ -400,6 +404,15 @@ msgstr "Lid tot"
 msgid "The date the member stops holding this membership."
 msgstr "De datum waarop het lid dit lidmaatschap beëindigd."
 
+#: models.py
+msgid "Membership of type {} for {} ({}) starting {}"
+msgstr "Lidmaatschap van type {} van {} ({}) gestart {}"
+
+#: models.py
+msgctxt "Membership until x"
+msgid " until {}"
+msgstr " tot {}"
+
 #: models.py
 msgid "End date can't be before start date"
 msgstr "De einddatum kan niet eerder zijn dan de startdatum"
@@ -436,6 +449,14 @@ msgstr "bevestigd"
 msgid "the old email address was checked"
 msgstr "het oude e-mailadres is gecontroleerd"
 
+#: models.py
+msgid ""
+"Email change request for {} to {} created at {} (confirmed: {}, verified: "
+"{})."
+msgstr ""
+"E-mail wijzigingsverzoek voor {} naar {} gemaakt op {} (bevestigd: {}, "
+"geverifieerd: {})."
+
 #: models.py
 msgid "Please enter a new email address."
 msgstr "Vul een nieuw e-mailadres in."

website/members/models.py

@@ -12,7 +12,7 @@ from django.db import models
 from django.db.models import Q
 from django.urls import reverse
 from django.utils import timezone
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import pgettext_lazy, gettext_lazy as _
 from functools import reduce
 from localflavor.generic.countries.sepa import IBAN_SEPA_COUNTRIES
 from localflavor.generic.models import IBANField
@@ -470,7 +470,7 @@ class Profile(models.Model):
             logging.warning("We already had this image")
 
     def __str__(self):
-        return str(self.user)
+        return _("Profile for {}").format(self.user)
 
 
 class Membership(models.Model):
@@ -509,6 +509,16 @@ class Membership(models.Model):
         null=True,
     )
 
+    def __str__(self):
+        s = _("Membership of type {} for {} ({}) starting {}").format(
+                self.get_type_display(), self.user.get_full_name(),
+                self.user.username, self.since,
+            )
+        if self.until is not None:
+            s += pgettext_lazy("Membership until x", " until {}").format(
+                    self.until)
+        return s
+
     def clean(self):
         super().clean()
 
@@ -566,6 +576,16 @@ class EmailChange(models.Model):
         help_text=_('the old email address was checked')
     )
 
+    def __str__(self):
+        return _(
+            "Email change request for {} to {} "
+            "created at {} "
+            "(confirmed: {}, verified: {})."
+        ).format(
+            self.member, self.email, self.created_at, self.confirmed,
+            self.verified
+        )
+
     @property
     def completed(self):
         return self.verified and self.confirmed