From 221efdec6cd51b331f2512f8114e3f0f150d160a Mon Sep 17 00:00:00 2001
From: eric <eric@hellman.net>
Date: Tue, 16 Aug 2016 17:17:24 -0400
Subject: [PATCH] make it easier to find and edit ebook editions

---
 frontend/forms.py                       | 6 +++++-
 frontend/templates/edition_display.html | 3 +++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/frontend/forms.py b/frontend/forms.py
index 0c10f46a..b432c2a2 100644
--- a/frontend/forms.py
+++ b/frontend/forms.py
@@ -242,7 +242,11 @@ class EditionForm(forms.ModelForm):
         has_goog = self.cleaned_data.get("goog", False) not in nulls
         has_http = self.cleaned_data.get("http", False) not in nulls
         has_doi = self.cleaned_data.get("doi", False) not in nulls
-        if not has_isbn and not has_oclc  and not has_goog and not has_http and not has_doi:
+        try:
+            has_id = self.instance.work.identifiers.all().count() > 0
+        except AttributeError:
+            has_id = False
+        if not has_id and not has_isbn and not has_oclc  and not has_goog and not has_http and not has_doi:
             raise forms.ValidationError(_("There must be either an ISBN, a DOI, a URL or an OCLC number."))
         return self.cleaned_data
     class Meta:
diff --git a/frontend/templates/edition_display.html b/frontend/templates/edition_display.html
index 86de5126..0c9583c4 100644
--- a/frontend/templates/edition_display.html
+++ b/frontend/templates/edition_display.html
@@ -19,6 +19,9 @@
             {% if edition.note %}
                 {{ edition.note }}.<br />
             {% endif %}
+            {% if edition.ebooks.all %}
+                {{ edition.ebooks.all.count }} ebooks<br />
+            {% endif %}
             {% if edition.publisher %}
                 Publisher: <a href="{% url 'bypubname_list' edition.publisher_name.id %}">{{edition.publisher}}</a><br />
             {% endif %}