OpenSlides/openslides/users/serializers.py

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from django.contrib.auth.hashers import make_password
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from django.contrib.auth.models import Permission
from django.utils.translation import ugettext as _
from django.utils.translation import ugettext_lazy
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from ..utils.rest_api import (
ModelSerializer,
PrimaryKeyRelatedField,
RelatedField,
ValidationError,
)
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from .models import Group, User
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class UserShortSerializer(ModelSerializer):
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"""
Serializer for users.models.User objects.
Serializes only name fields and about me field.
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"""
class Meta:
model = User
fields = (
'id',
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'username',
'title',
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'first_name',
'last_name',
'structure_level',
'about_me',
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'groups',
)
class UserFullSerializer(ModelSerializer):
"""
Serializer for users.models.User objects.
Serializes all relevant fields.
"""
groups = PrimaryKeyRelatedField(
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 = (
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'id',
'is_present',
'username',
'title',
'first_name',
'last_name',
'structure_level',
'about_me',
'comment',
'groups',
'default_password',
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'is_active',
)
def validate(self, data):
"""
Checks that first_name or last_name is given.
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Generates the username if it is empty.
"""
if not (data.get('username') or data.get('first_name') or data.get('last_name')):
raise ValidationError(_('Username, first name and last name can not all be empty.'))
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# Generate username. But only if it is not set and the serializer is not
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# called in a PATCH context (partial_update).
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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):
"""
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Creates the user. Sets the default password. Adds the new user to the
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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',
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'permissions',
)