implement #[influxdb(tag)] and #[influxdb(ignore)]

[blasrodri]

Trying to implement this

[msrd0]

Looking at the CI failure, these seem to be your problems:

• #[tag] needs to be updated: https://github.com/blasrodri/influxdb-rust/blob/influx-aware-macro-attr/influxdb/src/lib.rs#L42
• this comparision does not need owned String: https://github.com/blasrodri/influxdb-rust/blob/influx-aware-macro-attr/influxdb_derive/src/writeable.rs#L34 (clippy lint)
• this test generated an empty query: https://github.com/blasrodri/influxdb-rust/blob/influx-aware-macro-attr/influxdb/tests/derive_integration_tests.rs#L27

The first two should be easy to fix, the last error I'm not sure about why that's happening. You can use eprintln! from any macro code to emit debug messages at compile time - try to verify that the variables, especially is_ignored, contain the values you expect them to.

[blasrodri]

Thanks, @msrd0 for your comments. I think I've addressed most of the issues. Unfortunately, the CI is still failing.
Any ideas on how to fix it?

[msrd0]

The error appears here - I'd assume this is because the test is asking for humidity data from the database, which is now an ignored field, and therefore the database does not return any rows?

[msrd0]

Thanks for implementing this!

[Empty2k12]

Awesome! Thanks for this. Will be releasing a new version with this soon!

[Empty2k12]

Hello! I just published a change to crates.io containing your change as version 0.4.0. Thanks again for your contribution!