membershipworks: Improve EventExt admin

membershipworks/admin.py

@@ -1,5 +1,6 @@
 from django.contrib import admin
 from django.contrib.humanize.templatetags.humanize import naturaltime
+from django.utils.html import format_html
 
 from django_object_actions import DjangoObjectActions, action
 from django_q.tasks import async_task
@@ -107,27 +108,45 @@ class EventAdmin(admin.ModelAdmin):
     list_display = [
         "title",
         "start",
-        "end",
         "duration",
         "count",
         "cap",
         "category",
-        "venue",
     ]
-    list_filter = ["category", "calendar", "venue"]
+    list_filter = [
+        "category",
+        "calendar",
+        "venue",
+        ("materials_fee", admin.EmptyFieldListFilter),
+    ]
     show_facets = admin.ShowFacets.ALWAYS
     search_fields = ["eid", "title", "url"]
     date_hierarchy = "start"
-    readonly_fields = [
-        field.name
-        for field in Event._meta.get_fields()
-        if not (field.auto_created or field.many_to_many or not field.concrete)
-    ] + ["duration"]
 
-    @admin.display()
+    @property
+    def readonly_fields(self):
+        fields = []
+        for field in Event._meta.get_fields():
+            if field.auto_created or field.many_to_many or not field.concrete:
+                continue
+            elif field.name == "url":
+                fields.append("_url")
+            else:
+                fields.append(field.name)
+        fields.insert(fields.index("end") + 1, "duration")
+        return fields
+
+    @admin.display(ordering="duration")
     def duration(self, obj):
         return obj.duration
 
+    @admin.display(description="URL")
+    def _url(self, obj):
+        return format_html(
+            '<a href="https://claremontmakerspace.org/events/#!event/{0}">{0}</a>',
+            obj.url,
+        )
+
     def has_add_permission(self, request, obj=None):
         return False