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-rw-r--r--gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/ebook.html2
1 files changed, 1 insertions, 1 deletions
diff --git a/gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/ebook.html b/gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/ebook.html
index 44cd105..4b969ba 100644
--- a/gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/ebook.html
+++ b/gnowsys-ndf/gnowsys_ndf/ndf/templates/ndf/ebook.html
@@ -15,7 +15,7 @@
{% endif%}
</h2>
</a>
- {{ebook_gst.content|safe}}
+ {{ebook_gst.content|default_if_none:""|safe}}
{% endblock %}