Question

我使用python（django）和extjs4.2，但现在我不知道如何返回extjs treepanel的json格式数据，如下所示：

[{
    "text":"A",
    "id": 1,
    "leaf":false,
    "parentId":0,
    "root":4,
    "children": [{
        "text":"A_1",
        "id":2,
        "leaf":false,
        "parentId":1,
        "root":3,
        "children": [{
            "id":7,
            "leaf":true,
            "parentId":2,
            "root":3,
            "text":"A_1_1",
            "children":[]
        }]
    }]
}]

请帮帮我，谢谢。

Answer 1

树的结构非常容易理解：它是一个嵌套的节点列表，其中每个节点的子属性都是它自己的树。可以将其表示如下：

class Node(object):
    def __init__(self, id, text, root='', parent=None):
        self.text = text
        self.id = id
        self.root = root
        self.parent = parent
        self.children = []

    def append_child(self, node):
        if node not in self.children:
            node.parent = self
            self.children.append(node)

    def remove_child(self, node):
        if node in self.children:
            node.parent = None
            self.children.remove(node)

    def parent_id(self):
        return self.parent.id if self.parent is not None else 0

    def is_leaf(self):
        return len(self.children) == 0

    def to_dict(self):
        children_dict = [child.to_dict() for child in self.children]
        return {
             "id": self.id,
             "root": self.root,
             "text": self.text,
             "leaf": self.is_leaf(),
             "parentId": self.parent_id(),
             "children": children_dict,
         }

    def to_json(self):
        return json.dumps(self.to_dict)

使用python返回extjs treepanel的json数据

1 个答案: