From 1647026446625431f7ea6749ff49b70739e2a0b8 Mon Sep 17 00:00:00 2001
From: loris-fab <loris.fabbro@epfl.ch>
Date: Mon, 3 Aug 2026 15:08:21 +0200
Subject: [PATCH] [T3351] FIX: Restore childpack printing

- Register report.child_compassion.childpack_full/small rendering models so
  the report falls back on data['doc_ids']. The web client builds the report
  URL from the wizard options and drops the record ids, so the report was
  rendered on an empty recordset and produced a blank PDF whenever
  "Print background" was left unchecked.
- Call get_base_url() per record in _compute_qr_code, as it requires a
  singleton and raised "Expected singleton" when printing the QR code for
  several children at once.
---
 child_compassion/models/__init__.py         |  1 +
 child_compassion/models/child_compassion.py |  2 +-
 child_compassion/models/report_childpack.py | 48 +++++++++++++++++++++
 3 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 child_compassion/models/report_childpack.py

diff --git a/child_compassion/models/__init__.py b/child_compassion/models/__init__.py
index 383179c25..f79e9bb15 100644
--- a/child_compassion/models/__init__.py
+++ b/child_compassion/models/__init__.py
@@ -20,5 +20,6 @@
     major_revision,
     project_compassion,
     project_lifecycle_event,
+    report_childpack,
     weekly_demand,
 )
diff --git a/child_compassion/models/child_compassion.py b/child_compassion/models/child_compassion.py
index 49f46b914..b5699cb76 100644
--- a/child_compassion/models/child_compassion.py
+++ b/child_compassion/models/child_compassion.py
@@ -297,7 +297,6 @@ def _compute_qr_code(self):
         UTMs can be overridden through the context keys ``qr_utm_medium``,
         ``qr_utm_source`` and ``qr_utm_campaign``.
         """
-        base_url = self.get_base_url().rstrip("/")
         utm_params = {
             "utm_medium": self.env.context.get("qr_utm_medium") or "childpack_qr",
             "utm_source": self.env.context.get("qr_utm_source") or "hold_campaign",
@@ -307,6 +306,7 @@ def _compute_qr_code(self):
             utm_params["utm_campaign"] = utm_campaign
         query = urlencode(utm_params)
         for child in self:
+            base_url = child.get_base_url().rstrip("/")
             url = f"{base_url}/my2/new-sponsorship/{child.id}?{query}"
             qr = pyqrcode.create(url)
             child.qr_code_data = qr.png_as_base64_str(15, (0, 84, 166))
diff --git a/child_compassion/models/report_childpack.py b/child_compassion/models/report_childpack.py
new file mode 100644
index 000000000..ed618f586
--- /dev/null
+++ b/child_compassion/models/report_childpack.py
@@ -0,0 +1,48 @@
+##############################################################################
+#
+#    Copyright (C) 2016-2026 Compassion CH (http://www.compassion.ch)
+#    Releasing children from poverty in Jesus' name
+#
+#    The licence is in the file __manifest__.py
+#
+##############################################################################
+from odoo import api, models
+
+
+class ReportChildpackFull(models.AbstractModel):
+    """
+    Rendering context of the childpack reports.
+
+    The print wizard passes its options (lang, type, print_qr, ...) through the
+    ``data`` dictionary. When that dictionary is set, the web client builds the
+    report URL without the record ids (see ``getReportUrl`` in web), so the
+    report is rendered with no ``docids`` at all and would print a blank page.
+    We therefore fall back on the ids the wizard stored in ``data['doc_ids']``.
+    """
+
+    _name = "report.child_compassion.childpack_full"
+    _description = "Childpack report rendering context"
+
+    @api.model
+    def _get_report_values(self, docids, data=None):
+        data = dict(data or {})
+        docids = docids or data.get("doc_ids") or self.env.context.get("active_ids", [])
+        lang = data.get("lang")
+        docs = self.env["compassion.child"].browse(docids)
+        if lang:
+            docs = docs.with_context(lang=lang)
+        data.update(
+            {
+                "doc_ids": docs.ids,
+                "doc_model": "compassion.child",
+                "docs": docs,
+            }
+        )
+        return data
+
+
+# pylint: disable=R7980
+class ReportChildpackSmall(models.AbstractModel):
+    _inherit = "report.child_compassion.childpack_full"
+    _name = "report.child_compassion.childpack_small"
+    _description = "Small childpack report rendering context"