Subjects list page

app/app/views.py

@@ -291,11 +291,44 @@ def languages(request):
 def subjects(request):
     template = "app/subjects.html"
 
-    project = Project.objects.get(id=project_id)
+    subjects = (
+        Subject.objects.all()
+        .prefetch_related(
+            Prefetch(
+                "documentfile_set",
+                queryset=DocumentFile.objects.only("id", "title", "subjects").order_by("title"),
+            ),
+            Prefetch(
+                "project_set",
+                queryset=Project.objects.only("id", "name", "subjects").order_by("name"),
+            ),
+        )
+        .order_by("name")
+    )
+
+    subject_data = []
+
+    for subject in subjects:
+        documents = subject.documentfile_set.all()
+        projects = subject.project_set.all()
+        if documents or projects:
+            subject_data.append(
+                {
+                    "subject": subject,
+                    "documents": documents,
+                    "projects": projects,
+                }
+            )
+
+    paginator = Paginator(subject_data, 10)
+
+    page_number = request.GET.get("page")
+    page_obj = paginator.get_page(page_number)
 
     context = {
-        "current_page": "subject_detail",
-        "project": project,
+        "current_page": "subjects",
+        "subject_data": page_obj.object_list,
+        "page_obj": page_obj,
     }
     return render(request, template_name=template, context=context)
 

app/general/tests/tests_subject.py

@@ -1,15 +1,37 @@
-import unittest
-
 from django.test import TestCase
+from django.urls import reverse
 
-from general.models import Subject
+from general.models import DocumentFile, Institution, Project, Subject
 
 
-class TestSubject(TestCase):
+class TestSubjects(TestCase):
     def setUp(self):
+        self.institution = Institution.objects.create(
+            name="Test Institution",
+            abbreviation="TI",
+            url="http://testinstitution.org",
+            email="[email protected]",
+        )
+
         self.subject1 = Subject.objects.create(name="Mathematics")
         self.subject2 = Subject.objects.create(name="Science")
 
+        self.document1 = DocumentFile.objects.create(
+            title="Document 1", institution=self.institution, document_type="report"
+        )
+        self.document1.subjects.add(self.subject1)
+
+        self.document2 = DocumentFile.objects.create(
+            title="Document 2", institution=self.institution, document_type="report"
+        )
+        self.document2.subjects.add(self.subject2)
+
+        self.project1 = Project.objects.create(name="Project 1", institution=self.institution)
+        self.project1.subjects.add(self.subject1)
+
+        self.project2 = Project.objects.create(name="Project 2", institution=self.institution)
+        self.project2.subjects.add(self.subject2)
+
     def test_subject_creation(self):
         self.assertEqual(str(self.subject1), "Mathematics")
         self.assertEqual(str(self.subject2), "Science")
@@ -22,6 +44,11 @@ def test_history_records_creation(self):
         self.assertEqual(self.subject1.history.count(), 1)
         self.assertEqual(self.subject1.history.first().name, "Mathematics")
 
+    def test_subjects_view_num_queries(self):
+        with self.assertNumQueries(3):
+            response = self.client.get(reverse("subjects"))
 
-if __name__ == "__main__":
-    unittest.main()
+        self.assertEqual(response.status_code, 200)
+        self.assertTemplateUsed(response, "app/subjects.html")
+        self.assertTrue("subject_data" in response.context)
+        self.assertTrue("page_obj" in response.context)

app/templates/app/languages.html

@@ -4,10 +4,10 @@
 
 {% block content %}
 <br/>
-<div class="detail">
+<div class="project-list">
   <h2>{% trans "Languages" %}</h2>
   <br>
-    <div class="detail-row row">
+    <div class="row">
         {% for item in language_data %}
           <h5>{{ item.language.name }}</h5>
           <div class="col-md-6 col-12 detail-col">

app/templates/app/subjects.html

@@ -0,0 +1,83 @@
+{% extends "base.html" %}
+{% load static %}
+{% load i18n %}
+
+{% block content %}
+<br/>
+<div class="project-list">
+  <h2>{% trans "Subjects" %}</h2>
+  <br>
+  <div class="row">
+      {% for item in subject_data %}
+        <h5>{{ item.subject.name }}</h5>
+        <div class="col-md-6 col-12 detail-col">
+          <h6>{% trans "Documents" %}</h6>
+          {% if item.documents.exists %}
+              <div class="documents">
+                  <ul>
+                      {% for document in item.documents %}
+                      <li>
+                        <span class="icon-text"><i class="detail-icon bi-file-earmark"></i></span>
+                        <span class="icon-text"><a href="{% url 'document_detail' document.id %}">{{ document.title }}</a></span>
+                      </li>
+                      {% endfor %}
+                  </ul>
+              </div>
+          {% else %}
+              <p>{% trans "No documents available for this subject." %}</p>
+          {% endif %}
+        </div>
+        <div class="col-md-6 col-12 detail-col">
+            <h6>{% trans "Projects" %}</h6>
+            {% if item.projects.exists %}
+                <div class="projects">
+                    <ul>
+                        {% for project in item.projects %}
+                        <li>
+                          <span class="icon-text"><i class="detail-icon bi-clipboard2"></i></span>
+                          <span class="icon-text"><a href="{% url 'project_detail' project.id %}">{{ project.name }}</a></span>
+                        </li>
+                        {% endfor %}
+                    </ul>
+                </div>
+            {% else %}
+                <p>{% trans "No projects available for this subject." %}</p>
+            {% endif %}
+        </div>
+        <br>
+        <hr>
+        <br>
+      {% endfor %}
+  </div>
+
+  {% if page_obj.has_other_pages %}
+  <div class="pagination-wrapper d-flex justify-content-center align-items-center">
+    <ul class="pagination">
+        {% if page_obj.has_previous %}
+            <li class="page-item"><a class="page-link" href="?page=1">&laquo; {% trans "First" %}</a></li>
+            <li class="page-item"><a class="page-link" href="?page={{ page_obj.previous_page_number }}">&lsaquo; {% trans "Previous" %}</a></li>
+        {% else %}
+            <li class="page-item disabled"><a class="page-link" href="#">&laquo; {% trans "First" %}</a></li>
+            <li class="page-item disabled"><a class="page-link" href="#">&lsaquo; {% trans "Previous" %}</a></li>
+        {% endif %}
+
+        {% for num in page_obj.paginator.page_range %}
+            {% if page_obj.number == num %}
+                <li class="page-item active"><a class="page-link" href="#">{{ num }}</a></li>
+            {% elif num > page_obj.number|add:'-3' and num < page_obj.number|add:'3' %}
+                <li class="page-item"><a class="page-link" href="?page={{ num }}">{{ num }}</a></li>
+            {% endif %}
+        {% endfor %}
+
+        {% if page_obj.has_next %}
+            <li class="page-item"><a class="page-link" href="?page={{ page_obj.next_page_number }}">{% trans "Next" %} &rsaquo;</a></li>
+            <li class="page-item"><a class="page-link" href="?page={{ page_obj.paginator.num_pages }}">{% trans "Last" %} &raquo;</a></li>
+        {% else %}
+            <li class="page-item disabled"><a class="page-link" href="#">{% trans "Next" %} &rsaquo;</a></li>
+            <li class="page-item disabled"><a class="page-link" href="#">{% trans "Last" %} &raquo;</a></li>
+        {% endif %}
+    </ul>
+  </div>
+  {% endif %}
+</div>
+{% endblock content %}

app/templates/base.html

@@ -63,6 +63,12 @@
                                 class="nav-link" href="{% url 'languages' %}">{% trans "Languages" %}
                         </a>
                     </li>
+                    <li class="nav-item">
+                        <a
+                                {% if current_page == 'subjects' %} class="nav-link active" aria-current="page" {% endif %}
+                                class="nav-link" href="{% url 'subjects' %}">{% trans "Subjects" %}
+                        </a>
+                    </li>
                     <li class="nav-item">
                         <a class="nav-link" href="{% url 'admin:index' %}">{% trans "Admin" %}</a>
                     </li>