from django.contrib.auth.hashers import make_password from django.contrib.auth.models import Permission from .models import Group, PersonalNote, User from ..utils.autoupdate import inform_changed_data from ..utils.rest_api import ( IdPrimaryKeyRelatedField, JSONField, ModelSerializer, RelatedField, ValidationError, ) USERCANSEESERIALIZER_FIELDS = ( "id", "username", "title", "first_name", "last_name", "structure_level", "number", "about_me", "groups", "is_present", "is_committee", ) USERCANSEEEXTRASERIALIZER_FIELDS = USERCANSEESERIALIZER_FIELDS + ( "gender", "email", "last_email_send", "comment", "is_active", ) class UserFullSerializer(ModelSerializer): """ Serializer for users.models.User objects. Serializes all relevant fields for manager. """ groups = IdPrimaryKeyRelatedField( many=True, required=False, queryset=Group.objects.exclude(pk=1), help_text=( "The groups this user belongs to. A user will " "get all permissions granted to each of " "his/her groups." ), ) class Meta: model = User fields = USERCANSEEEXTRASERIALIZER_FIELDS + ( "default_password", "session_auth_hash", ) read_only_fields = ("last_email_send",) def validate(self, data): """ Checks if the given data is empty. Generates the username if it is empty. """ try: action = self.context["view"].action except (KeyError, AttributeError): action = None # Check if we are in Patch context, if not, check if we have the mandatory fields if action != "partial_update": if not ( data.get("username") or data.get("first_name") or data.get("last_name") ): raise ValidationError( {"detail": "Username, given name and surname can not all be empty."} ) # Generate username. But only if it is not set and the serializer is not # called in a PATCH context (partial_update). if not data.get("username") and action != "partial_update": data["username"] = User.objects.generate_username( data.get("first_name", ""), data.get("last_name", "") ) return data def prepare_password(self, validated_data): """ Sets the default password. """ # Prepare setup password. if not validated_data.get("default_password"): validated_data["default_password"] = User.objects.generate_password() validated_data["password"] = make_password(validated_data["default_password"]) return validated_data def create(self, validated_data): """ Creates the user. """ # Perform creation in the database and return new user. user = super().create(self.prepare_password(validated_data)) # TODO: This autoupdate call is redundant (required by issue #2727). See #2736. inform_changed_data(user) return user class PermissionRelatedField(RelatedField): """ A custom field to use for the permission relationship. """ default_error_messages = { "incorrect_value": 'Incorrect value "{value}". Expected app_label.codename string.', "does_not_exist": 'Invalid permission "{value}". Object does not exist.', } def to_representation(self, value): """ Returns the permission code string (app_label.codename). """ return ".".join((value.content_type.app_label, value.codename)) def to_internal_value(self, data): """ Returns the permission object represented by data. The argument data is what is sent by the client. This method expects permission code strings (app_label.codename) like to_representation() returns. """ try: app_label, codename = data.split(".") except ValueError: self.fail("incorrect_value", value=data) try: permission = Permission.objects.get( content_type__app_label=app_label, codename=codename ) except Permission.DoesNotExist: self.fail("does_not_exist", value=data) return permission class GroupSerializer(ModelSerializer): """ Serializer for django.contrib.auth.models.Group objects. """ permissions = PermissionRelatedField(many=True, queryset=Permission.objects.all()) class Meta: model = Group fields = ("id", "name", "permissions") def update(self, *args, **kwargs): """ Customized update method. We just refresh the instance from the database because of an unknown bug in Django REST framework. """ instance = super().update(*args, **kwargs) return Group.objects.get(pk=instance.pk) class PersonalNoteSerializer(ModelSerializer): """ Serializer for users.models.PersonalNote objects. """ notes = JSONField() class Meta: model = PersonalNote fields = ("id", "user", "notes") read_only_fields = ("user",)