我正在使用 OrientDB 存储有关视频租赁的信息。我将成员和电影表示为节点。每当会员借一部电影时，我都会在他们之间添加一个优势。该数据集有用户多次借阅电影。此外，我还需要存储租借电影的月份/季节（仍在决定哪个适合我们的需要，但除此之外）。我打算将上述细节存储在边缘。但我遇到了这个： http://orientdb.com/docs/2.1/Performance-Tuning-Graph.html
并且建议避免在边缘存储属性。我想知道我是否应该改变我的方法？如果是，那还有什么选择？
提前致谢。
【问题讨论】：
我认为在您的情况下，您可能会选择直接在边缘创建属性。存储与租赁相关的数据的另一种方法是在 Member 和 Movies 之间创建第三个节点（例如 RentalData）并利用 PK 和 FK 字段，但它类似于关系数据库并且没有必要。
我转载了一个小DB：
create class Member extends V;
create property Member.id integer;
create property Member.name string;
create property Member.surname string;
create index Member.id unique;
create class Movie extends V;
create property Movie.id integer;
create property Movie.title string;
create property Movie.minutes integer;
create index Movie.id unique;
create class borrows extends E;
create property borrows.rentaldate Datetime;
create vertex Member set id = 1, name = "Paul", surname = "Green";
create vertex Member set id = 2, name = "John", surname = "Smith";
create vertex Member set id = 3, name = "Frank", surname = "Redding";
create vertex Movie set id = 1, title = "Interstellar", minutes = 170;
create vertex Movie set id = 2, title = "The Gladiator", minutes = 176;
create edge borrows from (select from Member where id = 1) to (select from Movie where id = 1) set rentaldate = sysdate();
create edge borrows from (select from Member where id = 1) to (select from Movie where id = 2) set rentaldate = sysdate();
create edge borrows from (select from Member where id = 2) to (select from Movie where id = 2) set rentaldate = sysdate();
create edge borrows from (select from Member where id = 3) to (select from Movie where id = 1) set rentaldate = sysdate();
create edge borrows from (select from Member where id = 3) to (select from Movie where id = 2) set rentaldate = sysdate();
我将“rentaldata”属性直接存储在“borrows”边缘，以将成员与借用的电影相关联，我认为您可以像我一样做到这一点。
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