From 46f360f14d528fe2065b24f1c2098b11db7507ae Mon Sep 17 00:00:00 2001
From: CarmenMiranda <carmen@vauxoo.com>
Date: Tue, 15 Jul 2025 00:08:12 +0000
Subject: [PATCH] [FIX] purchase: Pre-Creation of `purchase_method`

Adding a pre-init hook to pre-create the field `purchase_method` and set
a default value with a sql query to avoid the computation on python.

This commit includes changes for the ircodoo project's issue 3675.
---
 addons/purchase/__init__.py     |  1 +
 addons/purchase/__manifest__.py |  1 +
 addons/purchase/hooks.py        | 20 ++++++++++++++++++++
 3 files changed, 22 insertions(+)
 create mode 100644 addons/purchase/hooks.py

diff --git a/addons/purchase/__init__.py b/addons/purchase/__init__.py
index f18a4646bbd02f..edb580d74d5073 100644
--- a/addons/purchase/__init__.py
+++ b/addons/purchase/__init__.py
@@ -5,3 +5,4 @@
 from . import models
 from . import report
 from . import populate
+from .hooks import pre_init_hook
diff --git a/addons/purchase/__manifest__.py b/addons/purchase/__manifest__.py
index 1c36c885126c36..a63803215571cc 100644
--- a/addons/purchase/__manifest__.py
+++ b/addons/purchase/__manifest__.py
@@ -34,6 +34,7 @@
     'demo': [
         'data/purchase_demo.xml',
     ],
+    "pre_init_hook": "pre_init_hook",
     'installable': True,
     'application': True,
     'assets': {
diff --git a/addons/purchase/hooks.py b/addons/purchase/hooks.py
new file mode 100644
index 00000000000000..78317ed7eb49ca
--- /dev/null
+++ b/addons/purchase/hooks.py
@@ -0,0 +1,20 @@
+import logging
+
+from odoo.tools import column_exists
+
+_logger = logging.getLogger(__name__)
+
+
+def pre_init_hook(cr):
+    pre_create_purchase_method(cr)
+
+
+def pre_create_purchase_method(cr):
+    """Create the purchase_method field in product.template if it does not exist (added in "purchase" dependency).
+    Also, set the default value to 'purchase' for existing products by query instead of computing it with Python.
+    """
+    if not column_exists(cr, "product_template", "purchase_method"):
+        cr.execute("ALTER TABLE product_template ADD COLUMN purchase_method character varying;")
+        _logger.info("Column 'purchase_method' added to product_template table.")
+        cr.execute("UPDATE product_template AS pt SET purchase_method = 'purchase';")
+        _logger.info("Setting purchase_method to 'purchase' for %s products", cr.rowcount)