Iterating over StorageDoubleMap with partial keys not working

[5tan-enj]

Problem :
Trying to fetch values from a StorageDoubleMap by supplying only a partial key, the result still returns all values in storage

Example :

Code :

pub async fn calculate_pool_data(pool_id : u32, era: u32) -> Result<(), Box<dyn std::error::Error>> {
	let relay_client = RelayClient::from_url("wss://rpc.relay.blockchain.enjin.io:443").await?;

	// get unbonding members
	let unbonding_members = {
		let query = relay::storage().nomination_pools().unbonding_members_iter1(6u32);
		let mut results = relay_client.storage().at_latest().await?.iter(query).await?;

		let mut unbonding_members = HashMap::new();
		while let Some(Ok((key, prefs))) = results.next().await {
			unbonding_members.insert(key, prefs);
		}
		unbonding_members
	};

	println!("Unbonding members {:?}", unbonding_members.len());

	Ok(())

}

Output :

Unbonding members 109

Expected Output :
1 (there is only one unbonding member)

[jsdw]

Thankyou for raising this; that is unexpected! We'll look into it!

[lexnv]

I was able to reproduce this issue on the following branch: https://github.com/paritytech/subxt/compare/lexnv/repro-case-1251?expand=1.

Indeed there seems to be a mismatch, most probably due to constructing the query differently.