fix(public document view): allow harvested documents with physical items

* Closes #3738.

Co-Authored-by: Pascal Repond <[email protected]>

rero_ils/modules/documents/templates/rero_ils/detailed_view_documents.html

@@ -363,7 +363,7 @@ <h3>
         {% if holdings_count > 0 %}
         {% include('rero_ils/_anonymous_button.html') %}
         {% endif %}
-        {% if record.harvested %}
+        {% if record.harvested and record|n_electronic_holdings %}
           {% include('rero_ils/_document_online.html') %}
         {% else %}
           <public-search-holdings

rero_ils/modules/documents/views.py

@@ -722,6 +722,15 @@ def get_articles(record):
     ]
 
 
+@blueprint.app_template_filter()
+def n_electronic_holdings(record):
+    """Get the number of electronic holdings for this document.
+
+    :return: integer of number of electronic holdings
+    """
+    return Document.get_n_available_holdings(record.pid)[1]
+
+
 @blueprint.app_template_filter()
 def online_holdings(document_pid, viewcode="global"):
     """Find holdings by document pid and viewcode.