Add single-class-classification mode

app/api/migrations/0002_project_single_class_classification.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.1.11 on 2019-12-06 08:36
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='project',
+            name='single_class_classification',
+            field=models.BooleanField(default=False),
+        ),
+    ]

app/api/models.py

@@ -32,6 +32,7 @@ class Project(PolymorphicModel):
     project_type = models.CharField(max_length=30, choices=PROJECT_CHOICES)
     randomize_document_order = models.BooleanField(default=False)
     collaborative_annotation = models.BooleanField(default=False)
+    single_class_classification = models.BooleanField(default=False)
 
     def get_absolute_url(self):
         return reverse('upload', args=[self.id])

app/api/serializers.py

@@ -105,7 +105,7 @@ class ProjectSerializer(serializers.ModelSerializer):
     class Meta:
         model = Project
         fields = ('id', 'name', 'description', 'guideline', 'users', 'current_users_role', 'project_type', 'image',
-                  'updated_at', 'randomize_document_order', 'collaborative_annotation')
+                  'updated_at', 'randomize_document_order', 'collaborative_annotation', 'single_class_classification')
         read_only_fields = ('image', 'updated_at', 'users', 'current_users_role')
 
 

app/api/tests/test_api.py

@@ -687,6 +687,18 @@ class TestAnnotationListAPI(APITestCase, TestUtilsMixin):
         sub_project_doc = mommy.make('Document', project=sub_project)
         mommy.make('SequenceAnnotation', document=sub_project_doc)
 
+        cls.classification_project = mommy.make('TextClassificationProject',
+                                                users=[project_member, another_project_member])
+        cls.classification_project_label_1 = mommy.make('Label', project=cls.classification_project)
+        cls.classification_project_label_2 = mommy.make('Label', project=cls.classification_project)
+        cls.classification_project_document = mommy.make('Document', project=cls.classification_project)
+        cls.classification_project_url = reverse(
+            viewname='annotation_list', args=[cls.classification_project.id, cls.classification_project_document.id])
+        assign_user_to_role(project_member=project_member, project=cls.classification_project,
+                            role_name=settings.ROLE_ANNOTATOR)
+        assign_user_to_role(project_member=another_project_member, project=cls.classification_project,
+                            role_name=settings.ROLE_ANNOTATOR)
+
         cls.url = reverse(viewname='annotation_list', args=[main_project.id, main_project_doc.id])
         cls.post_data = {'start_offset': 0, 'end_offset': 1, 'label': main_project_label.id}
         cls.num_entity_of_project_member = SequenceAnnotation.objects.filter(document=main_project_doc,
@@ -737,6 +749,32 @@ class TestAnnotationListAPI(APITestCase, TestUtilsMixin):
         response = self.client.post(self.url, format='json', data=self.post_data)
         self.assertEqual(response.status_code, status.HTTP_403_FORBIDDEN)
 
+    def test_disallows_second_annotation_for_single_class_project(self):
+        self._patch_project(self.classification_project, 'single_class_classification', True)
+
+        self.client.login(username=self.project_member_name, password=self.project_member_pass)
+        response = self.client.post(self.classification_project_url, format='json',
+                                    data={'label': self.classification_project_label_1.id})
+        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
+
+        response = self.client.post(self.classification_project_url, format='json',
+                                    data={'label': self.classification_project_label_2.id})
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+    def test_disallows_second_annotation_for_single_class_shared_project(self):
+        self._patch_project(self.classification_project, 'single_class_classification', True)
+        self._patch_project(self.classification_project, 'collaborative_annotation', True)
+
+        self.client.login(username=self.project_member_name, password=self.project_member_pass)
+        response = self.client.post(self.classification_project_url, format='json',
+                                    data={'label': self.classification_project_label_1.id})
+        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
+
+        self.client.login(username=self.another_project_member_name, password=self.another_project_member_pass)
+        response = self.client.post(self.classification_project_url, format='json',
+                                    data={'label': self.classification_project_label_2.id})
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
     def _patch_project(self, project, attribute, value):
         old_value = getattr(project, attribute, None)
         setattr(project, attribute, value)

app/api/views.py

@@ -187,12 +187,28 @@ class AnnotationList(generics.ListCreateAPIView):
         return queryset
 
     def create(self, request, *args, **kwargs):
+        self.check_single_class_classification(self.kwargs['project_id'], self.kwargs['doc_id'], request.user)
+
         request.data['document'] = self.kwargs['doc_id']
         return super().create(request, args, kwargs)
 
     def perform_create(self, serializer):
         serializer.save(document_id=self.kwargs['doc_id'], user=self.request.user)
 
+    @staticmethod
+    def check_single_class_classification(project_id, doc_id, user):
+        project = get_object_or_404(Project, pk=project_id)
+        if not project.single_class_classification:
+            return
+
+        model = project.get_annotation_class()
+        annotations = model.objects.filter(document_id=doc_id)
+        if not project.collaborative_annotation:
+            annotations = annotations.filter(user=user)
+
+        if annotations.exists():
+            raise ValidationError('requested to create duplicate annotation for single-class-classification project')
+
 
 class AnnotationDetail(generics.RetrieveUpdateDestroyAPIView):
     lookup_url_kwarg = 'annotation_id'

app/server/static/components/annotationMixin.js

@@ -92,6 +92,7 @@ export default {
       prevLimit: 0,
       paginationPages: 0,
       paginationPage: 0,
+      singleClassClassification: false,
       isAnnotationApprover: false,
       isMetadataActive: false,
       isAnnotationGuidelineActive: false,
@@ -196,7 +197,7 @@ export default {
 
     removeLabel(annotation) {
       const docId = this.docs[this.pageNumber].id;
-      HTTP.delete(`docs/${docId}/annotations/${annotation.id}`).then(() => {
+      return HTTP.delete(`docs/${docId}/annotations/${annotation.id}`).then(() => {
         const index = this.annotations[this.pageNumber].indexOf(annotation);
         this.annotations[this.pageNumber].splice(index, 1);
       });
@@ -258,6 +259,7 @@ export default {
       this.labels = response.data;
     });
     HTTP.get().then((response) => {
+      this.singleClassClassification = response.data.single_class_classification;
       this.guideline = response.data.guideline;
       const roles = response.data.current_users_role;
       this.isAnnotationApprover = roles.is_annotation_approver || roles.is_project_admin;

app/server/static/components/document_classification.vue

@@ -72,6 +72,10 @@ export default {
       if (annotation) {
         this.removeLabel(annotation);
       } else {
+        if (this.singleClassClassification && annotations.length >= 1) {
+          await Promise.all(annotations.map(item => this.removeLabel(item)));
+        }
+
         const docId = this.docs[this.pageNumber].id;
         const payload = {
           label: label.id,

app/server/static/components/projects.vue

@@ -64,6 +64,17 @@
               )
               | Share annotations across all users
 
+          div.field(v-if="projectType === 'DocumentClassification'")
+            label.checkbox
+              input(
+                v-model="singleClassClassification"
+                name="single_class_classification"
+                type="checkbox"
+                style="margin-right: 0.25em;"
+                required
+              )
+              | Single-class classification
+
         footer.modal-card-foot.pt20.pb20.pr20.pl20.has-background-white-ter
           button.button.is-primary(v-on:click="create()") Create
           button.button(v-on:click="isActive = !isActive") Cancel
@@ -150,6 +161,7 @@ export default {
     projectNameError: '',
     username: '',
     isSuperuser: false,
+    singleClassClassification: false,
     randomizeDocumentOrder: false,
     collaborativeAnnotation: false,
     isProjectAdmin: null,
@@ -208,6 +220,7 @@ export default {
         name: this.projectName,
         description: this.description,
         project_type: this.projectType,
+        single_class_classification: this.singleClassClassification,
         randomize_document_order: this.randomizeDocumentOrder,
         collaborative_annotation: this.collaborativeAnnotation,
         guideline: 'Please write annotation guideline.',