feat(case_cache): make case cache optional

gdcdatamodel/models/__init__.py

@@ -46,6 +46,7 @@
 from .caching import (
     NOT_RELATED_CASES_CATEGORIES,
     RELATED_CASES_LINK_NAME,
+    CACHE_CASES,
     cache_related_cases_on_update,
     cache_related_cases_on_insert,
     cache_related_cases_on_delete,
@@ -340,15 +341,16 @@ def node_id(self, value):
 
     # _related_cases_from_parents: get ids of related cases from this
     # nodes's sysan
-    attributes['_related_cases_from_cache'] = property(
-        related_cases_from_cache
-    )
+    if CACHE_CASES:
+        attributes['_related_cases_from_cache'] = property(
+            related_cases_from_cache
+        )
 
-    # _related_cases_from_parents: get ids of related cases from this
-    # nodes parents
-    attributes['_related_cases_from_parents'] = property(
-        related_cases_from_parents
-    )
+        # _related_cases_from_parents: get ids of related cases from this
+        # nodes parents
+        attributes['_related_cases_from_parents'] = property(
+            related_cases_from_parents
+        )
 
     # Create the Node subclass!
     cls = type(name, (Node,), dict(
@@ -460,17 +462,18 @@ def EdgeFactory(name, label, src_label, dst_label, src_dst_assoc,
     _assigned_association_proxies[dst_label].add(dst_src_assoc)
     _assigned_association_proxies[src_label].add(src_dst_assoc)
 
-    hooks_before_insert = Edge._session_hooks_before_insert + [
-        cache_related_cases_on_insert,
-    ]
 
-    hooks_before_update = Edge._session_hooks_before_update + [
-        cache_related_cases_on_update,
-    ]
+    hooks_before_insert = Edge._session_hooks_before_insert
+
+    hooks_before_update = Edge._session_hooks_before_update
+
+    hooks_before_delete = Edge._session_hooks_before_delete
+
+    if CACHE_CASES:
+        hooks_before_insert.append(cache_related_cases_on_insert)
+        hooks_before_update.append(cache_related_cases_on_update)
+        hooks_before_delete.append(cache_related_cases_on_delete)
 
-    hooks_before_delete = Edge._session_hooks_before_delete + [
-        cache_related_cases_on_delete,
-    ]
 
     cls = type(name, (Edge,), {
         '__label__': label,
@@ -569,7 +572,7 @@ def load_edges():
             or src_cls.label in ['annotation']
         )
 
-        if not cache_case:
+        if not cache_case or not CACHE_CASES:
             continue
 
         link = {

gdcdatamodel/models/caching.py

@@ -17,9 +17,15 @@
 
 from cdisutils.log import get_logger
 from psqlgraph import Node, Edge
+from gdcdictionary import gdcdictionary
 
 logger = get_logger('gdcdatamodel')
 
+CACHE_CASES = (
+    True if not hasattr(gdcdictionary, 'settings')
+    else gdcdictionary.settings.get('enable_case_cache', True)
+)
+
 #: This variable contains the link name for the case shortcut
 #: association proxy
 RELATED_CASES_LINK_NAME = '_related_cases'