added exception for parent dataset absent in collection

ckanext/geodatagov/helpers.py

@@ -3,6 +3,7 @@
 
 from ckan import plugins as p
 from ckanext.harvest.model import HarvestSource
+from ckan.logic import NotFound, NotAuthorized
 
 log = logging.getLogger(__name__)
 
@@ -59,8 +60,11 @@ def get_harvest_source_config(harvester_id):
 
 
 def get_collection_package(collection_package_id):
-    package = p.toolkit.get_action('package_show')({}, {'id': collection_package_id})
-    return package
+    try:
+        package = p.toolkit.get_action('package_show')({}, {'id': collection_package_id})
+        return package
+    except (NotFound, NotAuthorized):
+        pass
 
 
 def string(value):

ckanext/geodatagov/templates/package/read.html

@@ -14,10 +14,15 @@ <h3>{{ _('Collection') }}</h3>
 {% set collection_package = h.get_collection_package(collection_package_id) %}
 <section class="module-content">
     <h3>{{ _('Collection') }}</h3>
-    <p>{{ _('This dataset is part of the following collection:') }}</p>
-    <ul class="dataset-list unstyled">
-        {% snippet "snippets/package_item.html", package=collection_package, truncate=75 %}
-    </ul>
+    {% if collection_package %}
+        <p>{{ _('This dataset is part of the following collection:') }}</p>
+        <ul class="dataset-list unstyled">
+            {% snippet "snippets/package_item.html", package=collection_package, truncate=75 %}
+        </ul>
+    {% else %}
+        <p>{{ _('This dataset is part of the a collection.') }}</p>
+        <p><a href="{{ h.url_for('search', collection_package_id=collection_package_id) }}" class="btn-collection">{{ _('Search other datasets within the same collection') }}</a></p>
+    {% endif %}
 </section>
 {% endif %}
 {% endblock %}