🔨 ISBN added for an example of exact filter

Author: archatas

db.sqlite3

@@ -20,10 +20,14 @@ class AuthorAdmin(admin.ModelAdmin):
 @admin.register(Book)
 class BookAdmin(admin.ModelAdmin):
     save_on_top = True
-    list_display = ["title", "publishing_date"]
+    list_display = ["title", "get_authors", "isbn", "publishing_date"]
     list_filter = ["authors"]
     search_fields = ["title",]
     fieldsets = [
-        (_("Content"), {'fields': ["title", "authors", "publishing_date"]}),
+        (_("Content"), {'fields': ["title", "authors", "isbn", "publishing_date"]}),
     ]
-    filter_horizontal = ["authors"]
+    filter_horizontal = ["authors"]
+
+    def get_authors(self, obj):
+        return ", ".join([author.author_name for author in obj.authors.all()])
+    get_authors.short_description = _("Authors")

library/libraryapp/admin.py

@@ -44,6 +44,10 @@ class BookDocument(DocType):
         'pk': fields.IntegerField(),
     }, include_in_root=True)
 
+    isbn = fields.StringField(
+        index='not_analyzed',
+    )
+
     class Meta:
         model = Book # The model associated with this DocType
 
@@ -58,3 +62,6 @@ def get_instances_from_related(self, related_instance):
         """If related_models is set, define how to retrieve the Book instance(s) from the related model."""
         if isinstance(related_instance, Author):
             return related_instance.book_set.all()
+
+    def prepare_exact_title(self, obj):
+        return obj.title

library/libraryapp/documents.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('libraryapp', '0002_book_publishing_date'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='book',
+            name='isbn',
+            field=models.CharField(max_length=20, verbose_name='ISBN', blank=True),
+        ),
+    ]

library/libraryapp/migrations/0003_book_isbn.py

@@ -26,6 +26,7 @@ class Book(models.Model):
     title = models.CharField(_("Title"), max_length=200)
     authors = models.ManyToManyField(Author, verbose_name=_("Authors"))
     publishing_date = models.DateField(_("Publishing date"), blank=True, null=True)
+    isbn = models.CharField(_("ISBN"), blank=True, max_length=20)
 
     class Meta:
         verbose_name = _("Book")

library/libraryapp/models.py

@@ -3,13 +3,15 @@
 
 import operator
 
+from django.http import Http404
 from django.utils.translation import ugettext_lazy as _
 from django.shortcuts import render
 from django.core.paginator import Paginator, Page, EmptyPage, PageNotAnInteger
 from django import forms
 
 from crispy_forms import helper
 
+from elasticsearch import TransportError
 from elasticsearch_dsl.query import Q
 
 from .models import Author, Book
@@ -26,6 +28,10 @@ class SearchForm(forms.Form):
         label=_("Title"),
         required=False,
     )
+    isbn = forms.CharField(
+        label=_("ISBN"),
+        required=False,
+    )
     authors = forms.ModelMultipleChoiceField(
         label=_("Authors"),
         queryset=Author.objects.all(),
@@ -64,6 +70,10 @@ def book_list(request):
         if title:
             search = search.query("fuzzy", title=title)
 
+        isbn = form.cleaned_data['isbn']
+        if isbn:
+            search = search.query("match", isbn=isbn)
+
         authors = form.cleaned_data['authors']
         if authors:
             author_queries = []
@@ -88,13 +98,16 @@ def book_list(request):
     paginator = Paginator(search_results, paginate_by)
     page_number = request.GET.get("page")
     try:
-        page = paginator.page(page_number)
-    except PageNotAnInteger:
-        # If page parameter is not an integer, show first page.
-        page = paginator.page(1)
-    except EmptyPage:
-        # If page parameter is out of range, show last existing page.
-        page = paginator.page(paginator.num_pages)
+        try:
+            page = paginator.page(page_number)
+        except PageNotAnInteger:
+            # If page parameter is not an integer, show first page.
+            page = paginator.page(1)
+        except EmptyPage:
+            # If page parameter is out of range, show last existing page.
+            page = paginator.page(paginator.num_pages)
+    except TransportError:
+        raise Http404('Index does not exist. Run `python manage.py search_index --rebuild` to create it.')
 
     context = {
         'object_list': page,

library/libraryapp/views.py

@@ -22,7 +22,9 @@
     {% block page %}
         <div class="wrapper">
             <div id="header" class="clearfix">
+                <hr />
                 <h1 class="text-center">{% trans "Library of Django Books" %}</h1>
+                <hr />
                 {% block header_navigation %}
                 {% endblock %}
                 {% block language_chooser %}

library/templates/base.html

@@ -31,6 +31,7 @@ <h2>Filtered results ({{ object_list.paginator.count }})</h2>
                             {% for author in book.authors %}
                                 {{ author.author_name }}{% if not forloop.last %},{% endif %}
                             {% endfor %}
+                            {% if book.isbn %}<p>ISBN: {{ book.isbn }}</p>{% endif %}
                         </div>
                     </div>
                 {% endfor %}