Error("invalid type: null, expected a UUID string"... when querying #141
Description
I am trying to use this crate to talk to a gremlin server that is interfacing with an OrientDB graph. When I make simple requests to this gremlin server I get this response (I can provide the full stack trace if necessary):
hread 'test_gremlin_adapter' panicked at 'called `Result::unwrap()` on an `Err` value: Error("invalid type: null, expected a UUID string", line: 1, column: 17)', /home/gudjon/.cargo/registry/src/github.com-1ecc6299db9ec823/gremlin-client-0.8.0/src/aio/connection.rs:230:80
stack backtrace:
0: rust_begin_unwind
at /rustc/9bc8c42bb2f19e745a63f3445f1ac248fb015e53/library/std/src/panicking.rs:493:5
1: core::panicking::panic_fmt
at /rustc/9bc8c42bb2f19e745a63f3445f1ac248fb015e53/library/core/src/panicking.rs:92:14
2: core::option::expect_none_failed
at /rustc/9bc8c42bb2f19e745a63f3445f1ac248fb015e53/library/core/src/option.rs:1329:5
3: core::result::Result<T,E>::unwrap
at /home/gudjon/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/result.rs:1037:23
4: gremlin_client::aio::connection::receiver_loop::{{closure}}
at /home/gudjon/.cargo/registry/src/github.com-1ecc6299db9ec823/gremlin-client-0.8.0/src/aio/connection.rs:230:50
5: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
at /home/gudjon/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/mod.rs:80:19
6: tokio::runtime::task::core::CoreStage<T>::poll::{{closure}}
at /home/gudjon/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.9.0/src/runtime/task/core.rs:147:17
7: tokio::loom::std::unsafe_cell::UnsafeCell<T>::with_mut
at /home/gudjon/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.9.0/src/loom/std/unsafe_cell.rs:14:9
8: tokio::runtime::task::core::CoreStage<T>::poll
at /home/gudjon/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.9.0/src/runtime/task/core.rs:137:13
9: tokio::runtime::task::harness::poll_future::{{closure}}
at /home/gudjon/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.9.0/src/runtime/task/harness.rs:437:23
10: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
at /home/gudjon/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/panic.rs:344:9
11: std::panicking::try::do_call
at /home/gudjon/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/panicking.rs:379:40
...
The setup and query is as follows:
let options = ConnectionOptions::builder()
.host(host)
.port(port)
.build();
let client = GremlinClient::connect(options).await?.alias(database)
let g = traversal().with_remote_async(client);
let res = g
.v(())
.has_label("Entity")
.has((
"some-field-here",
"some-value-here",
))
.values(vec_of_fields)
.to_list()
.await
.expect("Query");I ran the corresponding query using the gremlin-python library without any trouble, so I know the server is up and responding.
Any ideas what could be causing this error?