Macro searchspot::vec_from_params [−] [src]

macro_rules! vec_from_params {
    ($params:expr, $param:expr) => { ... };
}

Given a Map, return a Vec<_> that contains all the items wrapped inside the Values.

Since iron/params returns Result<Map, ParamsError> (where Map is defined as BTreeMap<String, Value>) and we're asked to provide VectorOfTerms<String>::build_terms() a Vec<String>, we need to assert that it is_ok() and eventually retrieving its value using the convertion trait FromValue.

Either if the convertion result is_none() because of an error or we originally got a ParamsError, an empty Vec<String> will be returned.

Otherwise, the output will be a Vec<String> fill with all the returned Strings found inside the query string.


let mut params = Map::new();
params.assign("work_roles[]", Value::String("Fullstack".into())).unwrap();
params.assign("work_roles[]", Value::String("DevOps".into())).unwrap();

let work_roles: Vec<String> = vec_from_params!(params, "work_roles");
assert_eq!(work_roles, vec!["Fullstack", "DevOps"]);


let work_roles: Vec<String> = vec_from_params!(Map::new(), "work_roles");
assert_eq!(work_roles, Vec::<String>::new());