Added integer-field to supported custom colums

cps/templates/book_edit.html

@@ -70,7 +70,7 @@
             {% endif %}
 
             {% if c.datatype == 'int' %}
-              <input type="number" step="1" class="form-control" name="{{ 'custom_column_' ~ c.id }}" id="{{ 'custom_column_' ~ c.id }}" value="{{ book['custom_column_' ~ c.id][0].value }}">
+              <input type="number" step="1" class="form-control" name="{{ 'custom_column_' ~ c.id }}" id="{{ 'custom_column_' ~ c.id }}" value="{% if book['custom_column_' ~ c.id]|length > 0 %}{{ book['custom_column_' ~ c.id][0].value }}{% endif %}">
             {% endif %}
 
             {% if c.datatype in ['text', 'series'] and not c.is_multiple %}

cps/web.py

@@ -1313,7 +1313,7 @@ def delete_book(book_id):
                 cc_string = "custom_column_" + str(c.id)
                 if not c.is_multiple:
                     if len(getattr(book, cc_string)) > 0:
-                        if c.datatype == 'bool':
+                        if c.datatype == 'bool' or c.datatype == 'integer':
                             del_cc = getattr(book, cc_string)[0]
                             getattr(book, cc_string).remove(del_cc)
                             db.session.delete(del_cc)