Add linked lookups

ontology/forms.py

@@ -17,6 +17,11 @@ class SelectTopicForm(forms.Form):
     topic = AutoCompleteSelectField('topic_lookup')
 
 
+class SelectLinkedTopicForm(forms.Form):
+    topic = AutoCompleteSelectField('linked_topic_lookup',
+                                    label='Lookup topic (click to see) ', help_text='')
+
+
 class AddRelationAsymForm(forms.Form):
     A = AutoCompleteSelectField('topic_lookup', label='', help_text='')
     relation = forms.ChoiceField(choices=TOPIC_RELATIONS_ASYM, label='')

ontology/templates/ontology/ontology.html

@@ -12,13 +12,30 @@
 <div class="row">
   <div class="col-12">
     <h3 class="highlight">Ontology</h3>
+    <p>
+      Welcome to SciPost's Ontology, which is a curated set of interlinked Topics
+      pertaining to all of the sciences.
+    </p>
+    <p>
+      Topics and their relations are defined by Editorial-level personnel.
+    </p>
     <ul>
       {% if perms.scipost.can_manage_ontology %}
       <li><a href="{% url 'ontology:topic_create' %}">Add a Topic</a></li>
       {% endif %}
       <li><a href="{% url 'ontology:topics' %}">View list of Topics</a></li>
+      <li>
+	  <ul class="list-inline">
+	    <li class="list-inline-item">{{ select_linked_topic_form }}</li>
+	  </ul>
+      </li>
     </ul>
   </div>
 </div>
 
 {% endblock content %}
+
+{% block footer_script %}
+{{ block.super }}
+{{ select_linked_topic_form.media }}
+{% endblock footer_script %}

ontology/templates/ontology/topic_list.html

@@ -25,7 +25,9 @@
 	    </li>
 	    <li class="list-inline-item"><input class="btn btn-outline-secondary" type="submit" value="Filter"></li>
 	  </ul>
-      </form>
+	</form>
+      </li>
+      <li>{{ select_linked_topic_form }}</li>
     </ul>
   </div>
 </div>
@@ -33,9 +35,10 @@
 
 <div class="row">
   <div class="col-12">
-    <ul>
+    <h3>Topics</h3>
+    <ul class="list-inline">
       {% for topic in object_list %}
-      <li><a href="{% url 'ontology:topic_details' slug=topic.slug %}">{{ topic }}</a></li>
+      <li class="list-inline-item p-1"><a href="{% url 'ontology:topic_details' slug=topic.slug %}">{{ topic }}</a></li>
       {% endfor %}
     </ul>
 
@@ -50,3 +53,8 @@
 </div>
 
 {% endblock content %}
+
+{% block footer_script %}
+{{ block.super }}
+{{ select_linked_topic_form.media }}
+{% endblock footer_script %}

ontology/templatetags/lookup.py

@@ -3,6 +3,7 @@ __license__ = "AGPL v3"
 
 
 from django.core.exceptions import PermissionDenied
+from django.shortcuts import render, reverse
 
 from ajax_select import register, LookupChannel
 
@@ -43,3 +44,21 @@ class TopicLookup(LookupChannel):
     def check_auth(self, request):
         if not request.user.has_perm('scipost.can_manage_ontology'):
             raise PermissionDenied
+
+
+@register('linked_topic_lookup')
+class LinkedTopicLookup(LookupChannel):
+    model = Topic
+
+    def get_query(self, q, request):
+        return (self.model.objects.filter(name__icontains=q)[:10])
+
+    def format_item_display(self, item):
+        return
+
+    def format_match(self, item):
+        return "<span class='auto_lookup_display'><a href='%s'>%s</a></span>" % (
+            reverse('ontology:topic_details', kwargs={'slug': item.slug}), item)
+
+    def check_auth(self, request):
+        pass

ontology/views.py

@@ -14,14 +14,17 @@ from django.views.generic.list import ListView
 from guardian.decorators import permission_required
 
 from .models import Tag, Topic, RelationAsym, RelationSym
-from .forms import SelectTagForm, AddRelationAsymForm
+from .forms import SelectTagForm, SelectLinkedTopicForm, AddRelationAsymForm
 
 from scipost.forms import SearchTextForm
 from scipost.mixins import PaginationMixin, PermissionsMixin
 
 
 def ontology(request):
-    return render(request, 'ontology/ontology.html')
+    context = {
+        'select_linked_topic_form': SelectLinkedTopicForm(),
+    }
+    return render(request, 'ontology/ontology.html', context=context)
 
 
 class TopicCreateView(PermissionsMixin, CreateView):
@@ -69,7 +72,7 @@ def topic_remove_tag(request, slug, tag_id):
 
 class TopicListView(PaginationMixin, ListView):
     model = Topic
-    paginate_by = 25
+    paginate_by = 100
 
     def get_queryset(self):
         """
@@ -84,6 +87,7 @@ class TopicListView(PaginationMixin, ListView):
         context = super().get_context_data(**kwargs)
         context.update({
             'searchform': SearchTextForm(initial={'text': self.request.GET.get('text')}),
+            'select_linked_topic_form': SelectLinkedTopicForm(),
         })
         return context
 
@@ -103,10 +107,13 @@ class TopicDetailView(DetailView):
 def add_relation_asym(request, slug):
     form = AddRelationAsymForm(request.POST or None)
     if form.is_valid():
-        relation = RelationAsym(A=form.cleaned_data['A'], relation=form.cleaned_data['relation'],
-                                B=form.cleaned_data['B'])
-        relation.save()
-        messages.success(request, 'Relation successfully created')
+        relation, created = RelationAsym.objects.get_or_create(
+            A=form.cleaned_data['A'], relation=form.cleaned_data['relation'],
+            B=form.cleaned_data['B'])
+        if created:
+            messages.success(request, 'Relation successfully created')
+        else:
+            messages.info(request, 'This relation already exists')
     else:
         for error_messages in form.errors.values():
             messages.warning(request, *error_messages)