Revert "Invoicing: Allow plugins to add data (#5452)"

This reverts commit ccd922b7f0.

src/pretix/base/migrations/0290_invoice_plugin_data.py

@@ -1,18 +0,0 @@
-# Generated by Django 4.2.17 on 2025-09-09 09:55
-
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ("pretixbase", "0289_invoiceline_period"),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name="invoice",
-            name="plugin_data",
-            field=models.JSONField(default=dict),
-        ),
-    ]

src/pretix/base/models/invoices.py

@@ -201,7 +201,6 @@ class Invoice(models.Model):
     transmission_info = models.JSONField(null=True, blank=True)
 
     file = models.FileField(null=True, blank=True, upload_to=invoice_filename, max_length=255)
-    plugin_data = models.JSONField(default=dict)
 
     objects = ScopedManager(organizer='event__organizer')
 

src/pretix/base/services/invoices.py

@@ -61,9 +61,7 @@ from pretix.base.models.tax import EU_CURRENCIES
 from pretix.base.services.tasks import (
     TransactionAwareProfiledEventTask, TransactionAwareTask,
 )
-from pretix.base.signals import (
-    build_invoice_data, invoice_line_text, periodic_task,
-)
+from pretix.base.signals import invoice_line_text, periodic_task
 from pretix.celery_app import app
 from pretix.helpers.database import OF_SELF, rolledback_transaction
 from pretix.helpers.models import modelcopy
@@ -364,7 +362,6 @@ def build_invoice(invoice: Invoice) -> Invoice:
         invoice.reverse_charge = reverse_charge
         invoice.save()
 
-        build_invoice_data.send(sender=invoice.event, invoice=invoice)
         return invoice
 
 

src/pretix/base/signals.py

@@ -596,18 +596,6 @@ multiple events. Receivers should return a subclass of pretix.base.exporter.Base
 The ``sender`` keyword argument will contain an organizer.
 """
 
-build_invoice_data = EventPluginSignal()
-"""
-Arguments: ``invoice``
-
-This signal is sent out every time an invoice is built, after the invoice model was created
-and filled and before the PDF generation task is started. You can use this to make changes
-to the invoice, but we recommend to mostly use it to add content to ``Invoice.plugin_data``.
-You are responsible for saving any changes to the database.
-
-As with all event-plugin signals, the ``sender`` keyword argument will contain the event.
-"""
-
 validate_order = EventPluginSignal()
 """
 Arguments: ``payments``, ``positions``, ``email``, ``locale``, ``invoice_address``,