From 30db4cdd7511490d183fa084d5fff7bd9f34363a Mon Sep 17 00:00:00 2001
From: Adrian Torres <adt@odoo.com>
Date: Mon, 26 Feb 2018 15:12:25 +0100
Subject: [PATCH] [FIX] stock: remove existing demo data on reinstall

Previous to this rev.:
    *Install stock w/ demo data
    *Uninstall stock
    *Reinstall stock

Result: Boom! Installation crashes.

Reason: The demo data installed with stock is not properly deleted after
the module is uninstalled, which causes issues/conflicts upon
reinstallation of the same demo data.

Solution: Remove any demo data of stock models upon installation if any
exist through a pre_init_hook, ideally this would be done by overriding
the unlink() of the affected models / setting some ondelete='cascade',
or even a uninstall_hook, however these solutions prove insufficient for
databases that are currently affected by the problem.

Fixes #22243
---
 addons/stock/__init__.py     | 14 +++++++++++++-
 addons/stock/__manifest__.py |  1 +
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/addons/stock/__init__.py b/addons/stock/__init__.py
index ddac13e1a0e..bb5953c4834 100644
--- a/addons/stock/__init__.py
+++ b/addons/stock/__init__.py
@@ -4,4 +4,16 @@
 import controllers
 import models
 import report
-import wizard
\ No newline at end of file
+import wizard
+
+
+from odoo import api, SUPERUSER_ID
+
+
+# TODO: Apply proper fix & remove in master
+def pre_init_hook(cr):
+    env = api.Environment(cr, SUPERUSER_ID, {})
+    env['ir.model.data'].search([
+        ('model', 'like', '%stock%'),
+        ('module', '=', 'stock')
+    ]).unlink()
diff --git a/addons/stock/__manifest__.py b/addons/stock/__manifest__.py
index 9729e82be32..8f9a088fbf9 100644
--- a/addons/stock/__manifest__.py
+++ b/addons/stock/__manifest__.py
@@ -101,4 +101,5 @@ Dashboard / Reports for Inventory Management will include:
     'installable': True,
     'application': True,
     'auto_install': False,
+    'pre_init_hook': 'pre_init_hook',
 }