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from django.conf import settings
from django.contrib.auth import get_user_model
from django.shortcuts import get_object_or_404
from rest_framework import serializers
from rest_polymorphic.serializers import PolymorphicSerializer
from rest_framework.exceptions import ValidationError
from .models import Label, Project, Document, RoleMapping, Role
from .models import TextClassificationProject, SequenceLabelingProject, Seq2seqProject
from .models import DocumentAnnotation, SequenceAnnotation, Seq2seqAnnotation
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = get_user_model()
fields = ('id', 'username', 'first_name', 'last_name', 'email', 'is_superuser')
class LabelSerializer(serializers.ModelSerializer):
def validate(self, attrs):
if 'prefix_key' not in attrs and 'suffix_key' not in attrs:
return super().validate(attrs)
prefix_key = attrs['prefix_key']
suffix_key = attrs['suffix_key']
# In the case of user don't set any shortcut key.
if prefix_key is None and suffix_key is None:
return super().validate(attrs)
# Don't allow shortcut key not to have a suffix key.
if prefix_key and not suffix_key:
raise ValidationError('Shortcut key may not have a suffix key.')
# Don't allow to save same shortcut key when prefix_key is null.
try:
context = self.context['request'].parser_context
project_id = context['kwargs']['project_id']
except (AttributeError, KeyError):
pass # unit tests don't always have the correct context set up
else:
if Label.objects.filter(suffix_key=suffix_key,
prefix_key=prefix_key,
project=project_id).exists():
raise ValidationError('Duplicate key.')
return super().validate(attrs)
class Meta:
model = Label
fields = ('id', 'text', 'prefix_key', 'suffix_key', 'background_color', 'text_color')
class DocumentSerializer(serializers.ModelSerializer):
annotations = serializers.SerializerMethodField()
annotation_approver = serializers.SerializerMethodField()
def get_annotations(self, instance):
request = self.context.get('request')
project = instance.project
model = project.get_annotation_class()
serializer = project.get_annotation_serializer()
annotations = model.objects.filter(document=instance.id)
if request and not project.collaborative_annotation:
annotations = annotations.filter(user=request.user)
serializer = serializer(annotations, many=True)
return serializer.data
@classmethod
def get_annotation_approver(cls, instance):
approver = instance.annotations_approved_by
return approver.username if approver else None
class Meta:
model = Document
fields = ('id', 'text', 'annotations', 'meta', 'annotation_approver')
class ProjectSerializer(serializers.ModelSerializer):
current_users_role = serializers.SerializerMethodField()
def get_current_users_role(self, instance):
role_abstractor = {
"is_project_admin": settings.ROLE_PROJECT_ADMIN,
"is_annotator": settings.ROLE_ANNOTATOR,
"is_annotation_approver": settings.ROLE_ANNOTATION_APPROVER,
}
queryset = RoleMapping.objects.values("role_id__name")
if queryset:
users_role = get_object_or_404(
queryset, project=instance.id, user=self.context.get("request").user.id
)
for key, val in role_abstractor.items():
role_abstractor[key] = users_role["role_id__name"] == val
return role_abstractor
class Meta:
model = Project
fields = ('id', 'name', 'description', 'guideline', 'users', 'current_users_role', 'project_type', 'image',
'updated_at', 'randomize_document_order', 'collaborative_annotation')
read_only_fields = ('image', 'updated_at', 'current_users_role')
class TextClassificationProjectSerializer(ProjectSerializer):
class Meta:
model = TextClassificationProject
fields = ('id', 'name', 'description', 'guideline', 'users', 'current_users_role', 'project_type', 'image',
'updated_at', 'randomize_document_order')
read_only_fields = ('image', 'updated_at', 'users', 'current_users_role')
class SequenceLabelingProjectSerializer(ProjectSerializer):
class Meta:
model = SequenceLabelingProject
fields = ('id', 'name', 'description', 'guideline', 'users', 'current_users_role', 'project_type', 'image',
'updated_at', 'randomize_document_order')
read_only_fields = ('image', 'updated_at', 'users', 'current_users_role')
class Seq2seqProjectSerializer(ProjectSerializer):
class Meta:
model = Seq2seqProject
fields = ('id', 'name', 'description', 'guideline', 'users', 'current_users_role', 'project_type', 'image',
'updated_at', 'randomize_document_order')
read_only_fields = ('image', 'updated_at', 'users', 'current_users_role')
class ProjectPolymorphicSerializer(PolymorphicSerializer):
model_serializer_mapping = {
Project: ProjectSerializer,
TextClassificationProject: TextClassificationProjectSerializer,
SequenceLabelingProject: SequenceLabelingProjectSerializer,
Seq2seqProject: Seq2seqProjectSerializer
}
class ProjectFilteredPrimaryKeyRelatedField(serializers.PrimaryKeyRelatedField):
def get_queryset(self):
view = self.context.get('view', None)
request = self.context.get('request', None)
queryset = super(ProjectFilteredPrimaryKeyRelatedField, self).get_queryset()
if not request or not queryset or not view:
return None
return queryset.filter(project=view.kwargs['project_id'])
class DocumentAnnotationSerializer(serializers.ModelSerializer):
# label = ProjectFilteredPrimaryKeyRelatedField(queryset=Label.objects.all())
label = serializers.PrimaryKeyRelatedField(queryset=Label.objects.all())
document = serializers.PrimaryKeyRelatedField(queryset=Document.objects.all())
class Meta:
model = DocumentAnnotation
fields = ('id', 'prob', 'label', 'user', 'document')
read_only_fields = ('user', )
class SequenceAnnotationSerializer(serializers.ModelSerializer):
#label = ProjectFilteredPrimaryKeyRelatedField(queryset=Label.objects.all())
label = serializers.PrimaryKeyRelatedField(queryset=Label.objects.all())
document = serializers.PrimaryKeyRelatedField(queryset=Document.objects.all())
class Meta:
model = SequenceAnnotation
fields = ('id', 'prob', 'label', 'start_offset', 'end_offset', 'user', 'document')
read_only_fields = ('user',)
class Seq2seqAnnotationSerializer(serializers.ModelSerializer):
document = serializers.PrimaryKeyRelatedField(queryset=Document.objects.all())
class Meta:
model = Seq2seqAnnotation
fields = ('id', 'text', 'user', 'document', 'prob')
read_only_fields = ('user',)
class RoleSerializer(serializers.ModelSerializer):
class Meta:
model = Role
fields = ('id', 'name')
class RoleMappingSerializer(serializers.ModelSerializer):
username = serializers.SerializerMethodField()
rolename = serializers.SerializerMethodField()
@classmethod
def get_username(cls, instance):
user = instance.user
return user.username if user else None
@classmethod
def get_rolename(cls, instance):
role = instance.role
return role.name if role else None
class Meta:
model = RoleMapping
fields = ('id', 'user', 'role', 'username', 'rolename')