Initial

backend/app/admin.py

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+from django.conf import settings
+from django.contrib import admin
+from django.contrib.auth.models import Group  # , User
+from django.utils.html import format_html
+
+from app.models import Audiofile, Category, Content, Place
+
+# admin.site.register(Place, )
+
+#############################
+# Django defaults
+#############################
+
+admin.site.site_header = 'Klangkarte-Verwaltung'  # top-most title
+admin.site.index_title = 'Klangkarte'  # title at root
+admin.site.site_title = 'Klangkarte-Verwaltung'  # suffix to <title>
+
+admin.site.unregister(Group)
+# admin.site.unregister(User)
+
+
+#############################
+# App adjustments
+#############################
+
+
+@admin.register(Audiofile)
+class AudiofileAdmin(admin.ModelAdmin):
+    list_display = ['desc', 'media_url', 'created']
+    search_fields = ['desc']
+
+    @admin.display(description='URL')
+    def media_url(self, obj: 'Audiofile'):
+        return settings.MEDIA_URL + obj.url
+
+
+@admin.register(Category)
+class CategoryAdmin(admin.ModelAdmin):
+    list_display = ['name', 'color_dot', 'sort', 'places_count']
+    search_fields = ['name']
+
+    class Media:
+        css = {'all': ['admin/admin.css']}
+
+    @admin.display(description='Orte')
+    def places_count(self, obj: 'Category'):
+        return obj.places.count()
+
+    @admin.display(description='Farbe')
+    def color_dot(self, obj: 'Category'):
+        return format_html(
+            '<span class="color-dot" style="background:{};color:{}">{}</span>',
+            obj.color,
+            '#fff' if obj.fg_color_white else '#000',
+            obj.color.upper())
+
+
+@admin.register(Content)
+class ContentAdmin(admin.ModelAdmin):
+    list_display = ['title', 'body']
+    search_fields = ['title', 'body']
+
+    def get_readonly_fields(self, request, obj=None):
+        return ['key'] if obj else []
+
+
+@admin.register(Place)
+class PlaceAdmin(admin.ModelAdmin):
+    list_display = ['title', 'category', 'sort', 'created']
+    search_fields = ['title']
+    list_filter = ['category']