Example Usage - handle tripples in a loop

[hoijui]

Starting with the code at https://docs.rs/sophia_api/0.6.2/sophia_api/graph/trait.Graph.html#examples ,
I wanted to fill the loop with code, but failed using triple, due to borrowing/life-time issues.
One trial can be seen in this minimal project, where I want to store the parts of the triple in vec's, for using them in some way, later:
https://github.com/hoijui/sophia-q1

I also had problems using the data-structure.. I imagine I have to get the Rc<str> somehow, but I do not know how, and if that is right.

Could anyone give a heads up?
I would also be happy to know how to get there using the compiler errors.

[pchampin]

Disclaimer: I understand that the source of your problem is the lack of documentation in Sophia, so in the end, I am the one to blame.

That being said, it is hard to help you solve this particular problem as it is. The code you are pointing generates a lot of warnings, and the error reported by the compiler is clearly not the one that causes you problem (calling the fake method bla()).

For me to help you efficiently, could you please try to build a minimal reproducible example so that we could focus on one problem at a time?

[pchampin]

That being said, I just created a pull-request on your example repo with a running version of (what I understand of) you are trying to do, and some explanations of the rationale...

Ownership and lifetimes are hard to get right for beginners (and, I must says, not-quite-beginners as well). But overcoming those difficulties is very rewarding, and these notions are what makes Rust great. Good luck with your learning.

PS: if you have Rust questions that are not directly related to Sophia, don't hesitate to go to StackOverflow. The Rust community there is super welcoming and incredibly helpful.

[hoijui]

Perfect!
Thank you @pchampin !
your pull request is perfect! :-)

... and yes.. I was unsure if it makes sense to treat this as a problem I have with sophia, or rather one I have with rust. I can only say that I had less problems using these crates: rdf, kiss3d, petgraph

Thanks a lot, again!
I felt I was stuck at this with learning rust, and would not have continued without your help. I could not even have framed it as a general rust question (to put on SO, for example), as I could not pin it down to something specific.
ride on!

[pchampin]

One possible reason why it is harder with Sophia is that Sophia is intended to be very generic. Most of the methods are defined in traits, and how to actually use them depends on which specific implementation of these traits you are using.... best