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authorErik Johnston <erik@matrix.org>2015-08-11 11:40:40 +0100
committerErik Johnston <erik@matrix.org>2015-08-11 11:40:40 +0100
commit53a817518bd27e6838c747a03d605165f96dbd12 (patch)
tree000c7d7ac45464fc0c1ab6affe98c0e38816f723 /synapse/storage/_base.py
parentComment (diff)
downloadsynapse-53a817518bd27e6838c747a03d605165f96dbd12.tar.xz
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Diffstat (limited to 'synapse/storage/_base.py')
-rw-r--r--synapse/storage/_base.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index 4d86fe7c72..e5441aafb2 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -315,6 +315,8 @@ class CacheListDescriptor(object):
 
                 ret_d = ObservableDeferred(ret_d)
 
+                # We need to create deferreds for each arg in the list so that
+                # we can insert the new deferred into the cache.
                 for arg in missing:
                     observer = ret_d.observe()
                     observer.addCallback(lambda r, arg: r[arg], arg)