Add support to delete hash fields #130
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| // see https://github.com/redis/redis/issues/7860 | ||
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| unsafe { | ||
| RedisModule_HashSet.unwrap()( |
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It seems like the RedisModule_HashSet C API has been overloaded with multiple things and it does a lot more than merely setting a hash value.
I'm very new to Rust. I don't know where to draw the line between this project providing a user-friendly Rust API to modules vs this project being a very thin and pass-through wrapper around the C modules API. Does it make sense to extend hash_set to take a additional flags/options instead?
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The aim of this module is to provide an idiomatic Rust API for the Redis modules API. Using flag arguments to fundamentally change the functionality of a method isn't very common even in C, doubly so in Rust; so I think the approach you took here is the right one.
One thing I would change is rename all the instances of hash_del_single to simply hash_del, to match the existing style of hash_set/hash_get.
Oh, and thank you for the PR!
src/raw.rs
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| // support to pass multiple fields is desired but it's complicated | ||
| // see https://github.com/redis/redis/issues/7860 |
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Indeed; if we want to support multiple fields we should use a macro-based solution like we did for hash_get_multi.
| @@ -156,6 +156,7 @@ extern "C" { | |||
| /////////////////////////////////////////////////////////////// | |||
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| pub const FMT: *const c_char = b"v\0".as_ptr() as *const c_char; | |||
| pub const REDISMODULE_HASH_DELETE: *const RedisModuleString = 1 as *const RedisModuleString; | |||
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I tried to figure out why this was needed -- I expected bindgen to generate this automatically.
It turns out it doesn't because it can't parse the typecast, see rust-lang/rust-bindgen#316.
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prashanthpai
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