ruby-on-rails - 如何使用 awesome_nested_set 对节点内的节点重新排序

Question

如果我有一棵这样的树：

Page1
---Page1.1
---Page1.2
---Page1.3

使用 awesome_nested_set，我将如何在 Page1 节点内向上或向下移动 Page1.x？

谢谢。

Answer 1

来自http://github.com/collectiveidea/awesome_nested_set/blob/master/lib/awesome_nested_set.rb：

# Shorthand method for finding the left sibling and moving to the left of it.
def move_left
  move_to_left_of left_sibling
end

#Shorthand method for finding the right sibling and moving to the right of it.
def move_right
  move_to_right_of right_sibling
end

# Move the node to the left of another node (you can pass id only)
def move_to_left_of(node)
  move_to node, :left
end

# Move the node to the left of another node (you can pass id only)
def move_to_right_of(node)
  move_to node, :right
end