Init Django-SHOP

weirdlittleempire/management/translation.py

@@ -0,0 +1,73 @@
+"""
+These serializer mixinins and fields are used exclusively to import the file
+``workdir/fixtures/products-meta.json``. They are not intended for general
+purpose and can be deleted thereafter.
+"""
+from rest_framework import serializers
+
+
+class TranslatableModelSerializerMixin:
+    """
+    Pseudo class mimicking the behaviour of :class:`parler_rest.TranslatableModelSerializerMixin`.
+    It converts the content for fields of type TranslatedFieldsField to simple serializer
+    fields.
+    """
+
+    def to_internal_value(self, data):
+        data = self._unify_translated_data(data)
+        result = super().to_internal_value(data)
+        return result
+
+    def _unify_translated_data(self, data):
+        """
+        Unify translated data to be used by simple serializer fields.
+        """
+        for field_name, field in self.get_fields().items():
+            if isinstance(field, TranslatedFieldsField):
+                key = field.source or field_name
+                translations = data.pop(key, None)
+                if isinstance(translations, dict):
+                    data.update(translations.get('en', {}))
+        return data
+
+
+class TranslatedFieldsField(serializers.Field):
+    """
+    Pseudo class mimicking the behaviour of :class:`parler_rest.TranslatedFieldsField`, where only
+    the English translation is used.
+    """
+
+    def to_representation(self, value):
+        raise NotImplementedError(
+            "If USE_I18N is False, do not use {cls}.to_representation() for field '{field_name}'. "
+            "It thwarts the possibility to reuse that string in a multi language environment.".format(
+                cls=self.__class__.__name__,
+                field_name=self.field_name,
+            )
+        )
+
+    def validate_empty_values(self, data):
+        raise serializers.SkipField()
+
+
+class TranslatedField(serializers.Field):
+    """
+    Pseudo class mimicking the behaviour of :class:`parler_rest.TranslatedField`, where only
+    the English translation is used.
+    """
+
+    def to_representation(self, value):
+        raise NotImplementedError(
+            "If USE_I18N is False, do not use {cls}.to_representation() for field '{field_name}'. "
+            "It thwarts the possibility to reuse that string in a multi language environment.".format(
+                cls=self.__class__.__name__,
+                field_name=self.field_name,
+            )
+        )
+
+    def to_internal_value(self, data):
+        return data.get('en')
+
+
+__all__ = ['TranslatedFieldsField', 'TranslatedField',
+           'TranslatableModelSerializerMixin']