Add widget to pretty print JSONFields in admin

server/vbv_lernwelt/core/admin_utils.py

@@ -0,0 +1,19 @@
+import json
+
+from django.forms import Textarea
+from django.utils.html import format_html
+
+
+class PrettyJSONWidget(Textarea):
+    """
+    Custom widget that can pretty print JSONField data.
+    """
+
+    def render(self, name, value, attrs=None, renderer=None):
+        try:
+            parsed = json.loads(value)
+            pretty_printed = json.dumps(parsed, indent=4, sort_keys=True)
+        except (TypeError, ValueError):
+            pretty_printed = value
+        html = super().render(name, pretty_printed, attrs=attrs, renderer=renderer)
+        return format_html("<pre>{0}</pre>", html)

server/vbv_lernwelt/course/admin.py

@@ -1,11 +1,16 @@
 from django.contrib import admin
+from django.db.models import JSONField
 
+from vbv_lernwelt.core.admin_utils import PrettyJSONWidget
 from vbv_lernwelt.course.models import CourseSession, CourseSessionUser
 from vbv_lernwelt.learnpath.models import Circle
 
 
 @admin.register(CourseSession)
 class CourseSessionAdmin(admin.ModelAdmin):
+    formfield_overrides = {
+        JSONField: {"widget": PrettyJSONWidget(attrs={"rows": 16, "cols": 80})},
+    }
     date_hierarchy = "created_at"
     list_display = [
         "title",