def _add_tree_root(cluster_name, node_path):
"""增加树形结构根节点，保持树形结构
"""
root_node = ZdSnapshotTree(cluster_name=cluster_name,
node_path=node_path,
left=0,
right=1)
root_node.save()
def _add_tree_root(cluster_name, node_path):
"""增加树形结构根节点，保持树形结构
"""
root_node = ZdSnapshotTree(
cluster_name=cluster_name,
node_path=node_path,
left=0,
right=1
)
root_node.save()
def _add_tree_node(cluster_name, parent_node, node_path):
"""增加树形结构普通节点，需要保持树形结构
"""
slot_left = parent_node.left
# update left and right value
update_left_query = ZdSnapshotTree.update(left=ZdSnapshotTree.left + 2).where(
(ZdSnapshotTree.left > slot_left) & (ZdSnapshotTree.cluster_name == cluster_name)
)
update_right_query = ZdSnapshotTree.update(right=ZdSnapshotTree.right + 2).where(
(ZdSnapshotTree.right > slot_left) & (ZdSnapshotTree.cluster_name == cluster_name)
)
update_left_query.execute()
update_right_query.execute()
# create new node
child_node = ZdSnapshotTree(cluster_name=cluster_name, node_path=node_path, left=slot_left + 1, right=slot_left + 2)
child_node.save()
def _add_tree_node(cluster_name, parent_node, node_path):
"""增加树形结构普通节点，需要保持树形结构
"""
slot_left = parent_node.left
# update left and right value
update_left_query = ZdSnapshotTree.update(
left=ZdSnapshotTree.left +
2).where((ZdSnapshotTree.left > slot_left)
& (ZdSnapshotTree.cluster_name == cluster_name))
update_right_query = ZdSnapshotTree.update(
right=ZdSnapshotTree.right +
2).where((ZdSnapshotTree.right > slot_left)
& (ZdSnapshotTree.cluster_name == cluster_name))
update_left_query.execute()
update_right_query.execute()
# create new node
child_node = ZdSnapshotTree(cluster_name=cluster_name,
node_path=node_path,
left=slot_left + 1,
right=slot_left + 2)
child_node.save()
