Changeset 12095 for main/waeup.ikoba/trunk/src/waeup/ikoba/products

Timestamp:

30 Nov 2014, 09:12:44 (10 years ago)

Author:

Henrik Bettermann

Message:

Add event subscriber handle_product_removed which ensures that also referrers to customer application objects are removed when a product is deleted.

File:

• main/waeup.ikoba/trunk/src/waeup/ikoba/products/product.py (modified) (2 diffs)

main/waeup.ikoba/trunk/src/waeup/ikoba/products/product.py

@@ -24 +24 @@
 from hurry.workflow.interfaces import IWorkflowInfo, IWorkflowState
 from zope.event import notify
+from zope.catalog.interfaces import ICatalog
 from zope.component import getUtility
-from zope.component.interfaces import IFactory
+from zope.component.interfaces import IFactory, ComponentLookupError
 from zope.interface import implementedBy
 from zope.i18n import translate
@@ -61 +62 @@
     def getInterfaces(self):
         return implementedBy(Product)
+
+@grok.subscribe(IProduct, grok.IObjectRemovedEvent)
+def handle_product_removed(product, event):
+    """If a product is deleted, we make sure that also referrers to
+    customer application objects are removed.
+    """
+    prodid = product.product_id
+
+    # Find all customer applications that refer to given product...
+    try:
+        cat = getUtility(ICatalog, name='applications_catalog')
+    except ComponentLookupError:
+        # catalog not available. This might happen during tests.
+        return
+    results = cat.searchResults(last_product_id=(prodid, prodid))
+    for application in results:
+        # Remove that referrer...
+        application.product = None
+        notify(grok.ObjectModifiedEvent(application))
+        application.customer.__parent__.logger.info(
+            'ObjectRemovedEvent - %s - %s - removed: product' % (
+                application.customer.customer_id, application.application_id))
+    return
+