From e06be9ee2572516b274e2e0c8f5328ae573f4c64 Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Wed, 11 Oct 2017 00:08:35 +0200
Subject: [PATCH] API: Writable serializer for LazyI18nString

---
 src/pretix/api/serializers/i18n.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/pretix/api/serializers/i18n.py b/src/pretix/api/serializers/i18n.py
index bd03804adb..788427d8bb 100644
--- a/src/pretix/api/serializers/i18n.py
+++ b/src/pretix/api/serializers/i18n.py
@@ -1,5 +1,7 @@
 from django.conf import settings
 from i18nfield.fields import I18nCharField, I18nTextField
+from i18nfield.strings import LazyI18nString
+from rest_framework.exceptions import ValidationError
 from rest_framework.fields import Field
 from rest_framework.serializers import ModelSerializer
 
@@ -22,6 +24,16 @@ class I18nField(Field):
                 settings.LANGUAGE_CODE: str(value.data)
             }
 
+    def to_internal_value(self, data):
+        if isinstance(data, str):
+            return LazyI18nString(data)
+        elif isinstance(data, dict):
+            if any([k not in dict(settings.LANGUAGES) for k in data.keys()]):
+                raise ValidationError('Invalid languages included.')
+            return LazyI18nString(data)
+        else:
+            raise ValidationError('Invalid data type.')
+
 
 class I18nAwareModelSerializer(ModelSerializer):
     pass