1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
from sqlalchemy.schema import *
import sqlalchemy.engine
#engine = sqlalchemy.engine.create_engine('sqlite', ':memory:', {}, echo = True)
engine = sqlalchemy.engine.create_engine('postgres', {'database':'test', 'host':'127.0.0.1', 'user':'scott', 'password':'tiger'}, 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),
Column('root_node_id', Integer, ForeignKey('treenodes.node_id'), nullable=True),
Column('node_name', String(50), nullable=False),
Column('data_ident', Integer, ForeignKey('treedata.data_id'))
)
treedata = Table(
"treedata", engine,
Column('data_id', Integer, primary_key=True),
Column('value', String(100), nullable=False)
)
print "\n\n\n----------------------------"
print "Creating Tree Table:"
print "----------------------------"
#treedata.create()
#trees.create()
|
