diff options
Diffstat (limited to 'examples/adjacencytree/tables.py')
| -rw-r--r-- | examples/adjacencytree/tables.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/examples/adjacencytree/tables.py b/examples/adjacencytree/tables.py index 3cfe1e931..d721d9330 100644 --- a/examples/adjacencytree/tables.py +++ b/examples/adjacencytree/tables.py @@ -3,6 +3,10 @@ import sqlalchemy.engine engine = sqlalchemy.engine.create_engine('sqlite', ':memory:', {}, echo = True) +"""create the treenodes table. This is ia basic adjacency list model table. +One additional column, "root_node_id", references a "root node" row and is used +in the 'byroot_tree' example.""" + trees = Table('treenodes', engine, Column('node_id', Integer, primary_key=True), Column('parent_node_id', Integer, ForeignKey('treenodes.node_id'), nullable=True), |