How to choose between Links and Edges to connect vertices?

[KY]

n orientDB, we have links and edges to connect vertices. I can't find out what the cons/pros of each of them on the orientdb documentation.

Forum Example - three entities involved: Author, Message, Forum.

An author writes a message in a forum. - Option one: message is an edge between Author and Forum vertices - Option two: Message has a link to Author and another link to Forum

In other words, what strategy to choose and why?

thanks!

http://stackoverflow.com/questions/33745609/orientdb-how-to-choose-between-links-and-edges-to-connect-vertices?s=4|0.3728

[user.w...@gmail.com]

Hi,

if you don't have properties on your arch you can use a link, instead if you have it use edges.

Regards,

Michela

[Luigi Dell'Aquila]

Hi,

an important point is if you will need to traverse the relationship in both directions. Only edges support bi-directional traversal

Thanks

Luigi

2015-11-17 9:38 GMT+01:00 <user.w...@gmail.com>:

Hi,

if you don't have properties on your arc you can use a link, instead if you have it use edges.

Regards,

Michela

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[scott molinari]

Luigi,

Isn't is also a point that link integrity is up to the application/ the developer, but edge integrity will be handled by ODB?

Scott

[Luigi Dell'Aquila]

Hi Scott,

Yes, good point, simple links do not manage referential integrity, if you delete a linked instance you should also manually maintain the link.

Thanks

Luigi

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