Replace strings with "null" value as real null values rusqlite

I need to convert strings that have the value null to actual null values in a SQLite DB using rusqlite. I'm not in control of these string values. I've found the Null struct, but I'm not sure how to concisely pass it as a parameter, but then use the string value when it's not null.

sqlite.execute(
    "INSERT INTO people (name) VALUES (?1)",
    params![
        if person.name == "null" { &Null } else { person.name }
    ],
).unwrap();

But I get the error

`if` and `else` have incompatible types

expected `&rusqlite::types::Null`, found struct `std::string::String`rustc(E0308)

I could do something like this, but there has to be a better way.

if person.name == "null" {
    sqlite.execute(
        "INSERT INTO people (name) VALUES (?1)",
        params![
            &Null
        ],
    ).unwrap();
} else {
    sqlite.execute(
        "INSERT INTO people (name) VALUES (?1)",
        params![
            person.name
        ],
    ).unwrap();
}

I can only imagine how quickly something like this could get out of hand with multiple values in a more realistic setting. Is there some universal type I can covert the string type and the Null struct to? I could also make a SQL query to replace all these values once I'm done inserting, but I'd much rather do it right the first time around.

I'm not familiar with rusqlite, but in general, the tool for “might be null” in Rust is Option, and taking a look at rusqlite::ToSql confirms that there is a

impl<T: ToSql> ToSql for Option<T>

which does what you want. (It's undocumented, unfortunately, but following the “[src]” link shows its implementation.) To use it:

if person.name == "null" { None } else { Some(person.name) }