From 0e7859e538951c31f6fd1e721b8408c7ac983a28 Mon Sep 17 00:00:00 2001
From: mpeltriaux <Michel.Peltriaux@sgdnord.rlp.de>
Date: Wed, 13 Jul 2022 08:19:27 +0200
Subject: [PATCH] Geometry Model geom SRID migration

* adds two new migrations for transforming existing geometries into the default SRID
---
 konova/migrations/0012_auto_20220713_0801.py | 35 ++++++++++++++++++++
 konova/migrations/0013_auto_20220713_0814.py | 22 ++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 konova/migrations/0012_auto_20220713_0801.py
 create mode 100644 konova/migrations/0013_auto_20220713_0814.py

diff --git a/konova/migrations/0012_auto_20220713_0801.py b/konova/migrations/0012_auto_20220713_0801.py
new file mode 100644
index 00000000..bd6e7645
--- /dev/null
+++ b/konova/migrations/0012_auto_20220713_0801.py
@@ -0,0 +1,35 @@
+# Generated by Django 3.1.3 on 2022-07-13 06:01
+import django
+from django.db import migrations
+
+from konova.sub_settings.lanis_settings import DEFAULT_SRID_RLP
+
+
+def migrate_geometry_srs(apps, schema_editor):
+    Geometry = apps.get_model("konova", "Geometry")
+    all_geoms = Geometry.objects.all()
+
+    # Transform all geoms and store in new geom field
+    for geometry in all_geoms:
+        geom = geometry.geom
+        if geom is None:
+            continue
+        geom.transform(DEFAULT_SRID_RLP)
+        geometry.geom_tmp = geom
+        geometry.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('konova', '0011_auto_20220420_1101'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="geometry",
+            name="geom_tmp",
+            field=django.contrib.gis.db.models.fields.MultiPolygonField(blank=True, null=True, srid=DEFAULT_SRID_RLP)
+        ),
+        migrations.RunPython(migrate_geometry_srs),
+    ]
diff --git a/konova/migrations/0013_auto_20220713_0814.py b/konova/migrations/0013_auto_20220713_0814.py
new file mode 100644
index 00000000..c0af268e
--- /dev/null
+++ b/konova/migrations/0013_auto_20220713_0814.py
@@ -0,0 +1,22 @@
+# Generated by Django 3.1.3 on 2022-07-13 06:14
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('konova', '0012_auto_20220713_0801'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="geometry",
+            name="geom"
+        ),
+        migrations.RenameField(
+            model_name="geometry",
+            old_name="geom_tmp",
+            new_name="geom"
+        ),
+    ]