from django.contrib.auth.hashers import make_password from django.contrib.auth.models import Permission from django.utils.translation import ugettext as _ from django.utils.translation import ugettext_lazy from ..utils.rest_api import ( IdPrimaryKeyRelatedField, ModelSerializer, RelatedField, ValidationError, ) from .models import Group, User USERSHORTSERIALIZER_FIELDS = ( 'id', 'username', 'title', 'first_name', 'last_name', 'structure_level', 'number', 'about_me', 'groups', 'is_committee', ) class UserShortSerializer(ModelSerializer): """ Serializer for users.models.User objects. Serializes only name fields and about me field. """ class Meta: model = User fields = USERSHORTSERIALIZER_FIELDS class UserFullSerializer(ModelSerializer): """ Serializer for users.models.User objects. Serializes all relevant fields. """ groups = IdPrimaryKeyRelatedField( many=True, queryset=Group.objects.exclude(pk__in=(1, 2)), help_text=ugettext_lazy('The groups this user belongs to. A user will ' 'get all permissions granted to each of ' 'his/her groups.')) class Meta: model = User fields = ( 'id', 'is_present', 'username', 'title', 'first_name', 'last_name', 'number', 'structure_level', 'about_me', 'comment', 'groups', 'default_password', 'is_active', 'is_committee', ) def validate(self, data): """ Checks that first_name or last_name is given. Generates the username if it is empty. """ if not (data.get('username') or data.get('first_name') or data.get('last_name')): raise ValidationError({'detail': _('Username, first name and last name 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). try: action = self.context['view'].action except (KeyError, AttributeError): action = None 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 create(self, validated_data): """ Creates the user. Sets the default password. Adds the new user to the registered group. """ # 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'], '', 'md5') # Perform creation in the database and return new user. return super().create(validated_data) class PermissionRelatedField(RelatedField): """ A custom field to use for the permission relationship. """ default_error_messages = { 'incorrect_value': ugettext_lazy('Incorrect value "{value}". Expected app_label.codename string.'), 'does_not_exist': ugettext_lazy('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', )