tulip bay
I need to deserialize URL query parameters like ?some_var=a&special={"other_var"%3A"something"} with JSON mixed in
Corresponding structs are
struct Outer {
some_var: String,
special: Inner
}
struct Inner {
other_var: String
}
What's the best way to do this? I think serde's with attribute could help, but I'm not sure where to hook it up to
lethal idol
with allows you to write custom functions for deserialization so shouldn't be too hard to wire one up with serde_json
note that it's possible you'll have to take care of URL-decoding
tulip bay
`with` allows you to write custom functions for deserialization so shouldn't be ...
serde expects a function of the form fn<'de, D>(D) -> Result<T, D::Error> where D: Deserializer<'de> for deserialize_with and I have no idea where I'm supposed to hook that up to 
lethal idol
fn my_deser<'de, D: Deserializer<'de>, Inner>(de: D) -> Result<Inner, D::Error> {
let s = String::deserialize(de)?;
// can't remember exactly but there's a "custom" constructor for errors in serde
serde_json::from_str(&s).map_err(|_| serde::Error::custom())
}
#[derive(Deserialize)]
struct Outer {
some_var: String,
#[serde(deserialize_with = "my_deser")]
special: Inner
}
^ not tested but smth like that