關聯的節點到現有節點py2neo OGM

Question

我用py2neo V3連接的Neo4j數據庫

我OGM模式：

class User(GraphObject): 
    __primarykey__ = "username" 

    username = Property() 
    password = Property() 

    ppi_graph = RelatedTo(Graph, "PPI_Graph") 

class Graph(GraphObject): 
    __primarykey__ = "name" 

    name = Property() 
    date = Property() 

    node = RelatedTo(Node) 
    user = RelatedFrom(User,"PPI_Graph") 

class Node(GraphObject): 
    __primarykey__ = "name" 

    name = Property() 

    ppigraph = RelatedFrom(Graph, "HAVE_NODE") 
    related = Related(Node, "Related") 

第一種方法：

查找用戶，創建新圖，加用戶對圖graph.user.add()

graph #connection to neo4j db 
user = User.select(graph, username).first() 
gr = Graph() 
gr.name = "graph" 
gr.date = "today" 
gr.user.add(user) 
graph.push(gr) 

t他的方法將數據推送到數據庫

第二種方法：

查找用戶，創建新的圖形，當用戶添加ppi_graph添加圖形用戶user.graph.add()

graph #connection to neo4j db 
user = User.select(graph, username).first() 
gr = Graph() 
gr.name = "graph" 
gr.date = "today" 
user.ppi_graph.add(us) 
graph.push(us) 

此方法引發錯誤：

related_object = self.related_class.wrap(node) 
AttributeError: type object 'Graph' has no attribute 'wrap' 

爲什麼我不能爲finder用戶添加新圖？

Answer 1

Graph和Node是核心py2neo類，你可能不應該使用這些名稱來定義你自己的類，以免出現這種混淆。