Is it possible to deserialize an object not within an object ?

[DontBreakAlex]

I ended up writing this abomination:

#[derive(Deserialize)]
struct Helper {
	#[serde(with = "tuple_vec_map")]
	inner: Vec<(EventTypes, Frequency)>
}

fn map_frequency(v: serde_json::Value) -> Result<Vec<FrequencyMapEntry>> {
	let val = json!({ "inner": v });
	let vec: Helper = serde_json::from_value(val)?;
        // ... More code
}

How can I get rid of the Helper struct ?

[daboross]

That's a great question! I don't think it's currently possible for this crate. This would make a great addition.

[DontBreakAlex]

After digging around, I found that you can write that:

#[derive(Deserialize)]
struct Helper (
	#[serde(with = "tuple_vec_map")]
	Vec<(EventType, Frequency)>
);

fn map_frequency(v: serde_json::Value) -> Result<Vec<FrequencyMapEntry>> {
	let vec: Helper = serde_json::from_value(v)?;
}

[daboross]

I'm glad you found a solution to your situation! I believe that should work reliably for serde_json::Value deserialization.

For other situations, I do think the crate should have a general solution. I've opened #6, and after more thought will pull and make a new release with this functionality.

[omelia-iliffe]

Could you publish this change as a version on crates.io. Took me a while to work out why I wasn't able to import Wrapper :)