backref() func will also honor lazy=True/False

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/sqlalchemy/mapping/properties.py b/lib/sqlalchemy/mapping/properties.py
index 6ca0a7641..ba77d3f4c 100644
--- a/lib/sqlalchemy/mapping/properties.py
+++ b/lib/sqlalchemy/mapping/properties.py
@@ -822,7 +822,12 @@ class BackRef(object):
             else:
                 pj = prop.primaryjoin
                 sj = None
-            relation = LazyLoader(prop.parent, prop.secondary, pj, sj, backref=prop.key, is_backref=True, **self.kwargs)
+            lazy = self.kwargs.pop('lazy', True)
+            if lazy:
+                cls = LazyLoader
+            else:
+                cls = EagerLoader
+            relation = cls(prop.parent, prop.secondary, pj, sj, backref=prop.key, is_backref=True, **self.kwargs)
             prop.mapper.add_property(self.key, relation);
         else:
             # else set one of us as the "backreference"