[IMP] adds check view python scripts at db preparation step

pre_migration_view_checking.py

@@ -0,0 +1,126 @@
+#!/usr/bin/env python3
+"""
+Pre-Migration Cleanup Script for Odoo
+Run this BEFORE migrating to identify and clean up custom views.
+
+Usage: odoo shell -d dbname < pre_migration_cleanup.py
+"""
+
+print("\n" + "="*80)
+print("PRE-MIGRATION CLEANUP - VIEW ANALYSIS")
+print("="*80 + "\n")
+
+# 1. Find all custom (COW) views
+print("STEP 1: Identifying Custom/COW Views")
+print("-"*80)
+
+all_views = env['ir.ui.view'].search(['|', ('active', '=', True), ('active', '=', False)])
+cow_views = all_views.filtered(lambda v: not v.model_data_id)
+
+print(f"Total views in database: {len(all_views)}")
+print(f"Custom views (no module): {len(cow_views)}")
+print(f"Module views: {len(all_views) - len(cow_views)}\n")
+
+if cow_views:
+    print("Custom views found:\n")
+    print(f"{'ID':<8} {'Active':<8} {'Key':<50} {'Name':<40}")
+    print("-"*120)
+
+    for view in cow_views[:50]:  # Show first 50
+        active_str = "✓" if view.active else "✗"
+        key_str = view.key[:48] if view.key else "N/A"
+        name_str = view.name[:38] if view.name else "N/A"
+        print(f"{view.id:<8} {active_str:<8} {key_str:<50} {name_str:<40}")
+
+    if len(cow_views) > 50:
+        print(f"\n... and {len(cow_views) - 50} more custom views")
+
+# 2. Find duplicate views
+print("\n" + "="*80)
+print("STEP 2: Finding Duplicate Views (Same Key)")
+print("-"*80 + "\n")
+
+from collections import defaultdict
+
+keys = defaultdict(list)
+for view in all_views.filtered(lambda v: v.key and v.active):
+    keys[view.key].append(view)
+
+duplicates = {k: v for k, v in keys.items() if len(v) > 1}
+
+print(f"Found {len(duplicates)} keys with duplicate views:\n")
+
+if duplicates:
+    for key, views in sorted(duplicates.items()):
+        print(f"\nKey: {key} ({len(views)} duplicates)")
+        for view in views:
+            module = view.model_data_id.module if view.model_data_id else "⚠️  Custom/DB"
+            print(f"  ID {view.id:>6}: {module:<25} | {view.name}")
+
+# 3. Find views that might have xpath issues
+print("\n" + "="*80)
+print("STEP 3: Finding Views with XPath Expressions")
+print("-"*80 + "\n")
+
+import re
+
+views_with_xpath = []
+xpath_pattern = r'<xpath[^>]+expr="([^"]+)"'
+
+for view in all_views.filtered(lambda v: v.active and v.inherit_id):
+    xpaths = re.findall(xpath_pattern, view.arch_db)
+    if xpaths:
+        views_with_xpath.append({
+            'view': view,
+            'xpaths': xpaths,
+            'is_custom': not bool(view.model_data_id)
+        })
+
+print(f"Found {len(views_with_xpath)} views with xpath expressions")
+
+custom_xpath_views = [v for v in views_with_xpath if v['is_custom']]
+print(f"  - {len(custom_xpath_views)} are custom views (potential issue!)")
+print(f"  - {len(views_with_xpath) - len(custom_xpath_views)} are module views\n")
+
+if custom_xpath_views:
+    print("Custom views with xpaths (risk for migration issues):\n")
+    for item in custom_xpath_views:
+        view = item['view']
+        print(f"ID {view.id}: {view.name}")
+        print(f"  Key: {view.key}")
+        print(f"  Inherits from: {view.inherit_id.key}")
+        print(f"  XPath count: {len(item['xpaths'])}")
+        print(f"  Sample xpaths: {item['xpaths'][:2]}")
+        print()
+
+# 4. Summary and recommendations
+print("=" * 80)
+print("SUMMARY AND RECOMMENDATIONS")
+print("=" * 80 + "\n")
+
+print(f"📊 Statistics:")
+print(f"  • Total views: {len(all_views)}")
+print(f"  • Custom views: {len(cow_views)}")
+print(f"  • Duplicate view keys: {len(duplicates)}")
+print(f"  • Custom views with xpaths: {len(custom_xpath_views)}\n")
+
+print(f"\n📋 RECOMMENDED ACTIONS BEFORE MIGRATION:\n")
+
+if custom_xpath_views:
+    print(f"1. Archive or delete {len(custom_xpath_views)} custom views with xpaths:")
+    print(f"   • Review each one and determine if still needed")
+    print(f"   • Archive unnecessary ones: env['ir.ui.view'].browse([ids]).write({{'active': False}})")
+    print(f"   • Plan to recreate important ones as proper module views after migration\n")
+
+if duplicates:
+    print(f"2. Fix {len(duplicates)} duplicate view keys:")
+    print(f"   • Manually review and delete obsolete duplicates, keeping the most appropriate one")
+    print(f"   • Document the remaining appropriate ones as script post_migration_fix_duplicated_views.py will run AFTER the migration and delete all duplicates.\n")
+
+if cow_views:
+    print(f"3. Review {len(cow_views)} custom views:")
+    print(f"   • Document which ones are important")
+    print(f"   • Export their XML for reference")
+    print(f"   • Consider converting to module views\n")
+
+print("=" * 80 + "\n")