@@ -0,0 +4,4 @@
+from django.db import migrations
+
+
+def natural_key(page):

@@ -0,0 +38,4 @@
+        page.uuid = uuid.UUID(slug_hash.hexdigest()[:32])
+        if page.uuid in known_uuids:
+            # uuid unicity !
+            page.uuid = uuid.uuid4()

@@ -0,0 +1,36 @@
+from django.db import migrations
+
+
+def forward(apps, schema_editor):

@@ -631,4 +630,0 @@
-                cell_data['fields']['display_mode'] = 'table'
-                cell_data['fields']['title_type'] = 'auto'
-                if cell_data['fields'].get('custom_title'):
-                    cell_data['fields']['title_type'] = 'manual'

@@ -0,0 +25,4 @@
+    for snapshot in PageSnapshot.objects.all():
+        changed = False
+
+        if (snapshot.serialization.get('fields') or {}).get('parent'):

@@ -0,0 +28,4 @@
+    Page = apps.get_model('data', 'Page')
+    known_uuids = set(Page.objects.filter(uuid__isnull=False).values_list('uuid', flat=True))
+    for page in Page.objects.filter(uuid__isnull=True):
+        if page.snapshot is not None:

@@ -0,0 +9,4 @@
+    except (ValueError, AttributeError):
+        pass
+    else:
+        # it's a uuid, don't change it

@@ -0,0 +21,4 @@
+def forward(apps, schema_editor):
+    PageSnapshot = apps.get_model('data', 'PageSnapshot')
+    Page = apps.get_model('data', 'Page')
+    page_uuids_by_slugs = {page.slug: str(page.uuid) for page in Page.objects.only('uuid', 'slug')}