From 86f2e494c2b18f21c307e347ad1fd0d9b9619865 Mon Sep 17 00:00:00 2001
From: Pavel 'LEdoian' Turinsky <ledoian@matfyz.cz>
Date: Wed, 6 May 2020 19:52:27 +0200
Subject: [PATCH] TreeNode: first_child je 1-2-1-Field, ne FK.
---
seminar/migrations/0083_auto_20200506_1952.py | 19 +++++++++++++++++++
seminar/models.py | 2 +-
2 files changed, 20 insertions(+), 1 deletion(-)
create mode 100644 seminar/migrations/0083_auto_20200506_1952.py
diff --git a/seminar/migrations/0083_auto_20200506_1952.py b/seminar/migrations/0083_auto_20200506_1952.py
new file mode 100644
index 00000000..0c7fcf38
--- /dev/null
+++ b/seminar/migrations/0083_auto_20200506_1952.py
@@ -0,0 +1,19 @@
+# Generated by Django 2.2.12 on 2020-05-06 17:52
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+ dependencies = [
+ ('seminar', '0082_auto_20200506_1951'),
+ ]
+
+ operations = [
+ migrations.AlterField(
+ model_name='treenode',
+ name='first_child',
+ field=models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='father_of_first', to='seminar.TreeNode', verbose_name='první potomek'),
+ ),
+ ]
diff --git a/seminar/models.py b/seminar/models.py
index 57d4304a..43d6e59d 100644
--- a/seminar/models.py
+++ b/seminar/models.py
@@ -1246,7 +1246,7 @@ class TreeNode(PolymorphicModel):
blank = False,
on_delete = models.SET_NULL, # Vrcholy s null kořenem jsou sirotci bez ročníku
verbose_name="kořen stromu")
- first_child = models.ForeignKey('TreeNode',
+ first_child = models.OneToOneField('TreeNode',
related_name='father_of_first',
null = True,
blank = True,