Function diesel::update
[−]
[src]
pub fn update<T: IntoUpdateTarget>(
source: T
) -> IncompleteUpdateStatement<T::Table, T::WhereClause>
Creates an update statement. Helpers for updating a single row can be
generated by deriving AsChangeset
Examples
let updated_row = diesel::update(users.filter(id.eq(1))) .set(name.eq("James")) .get_result(&connection); // On backends that support it, you can call `get_result` instead of `execute` // to have `RETURNING *` automatically appended to the query. Alternatively, you // can explicitly return an expression by using the `returning` method before // getting the result. assert_eq!(Ok((1, "James".to_string())), updated_row);
To update multiple columns, give set
a tuple argument:
let updated_row = diesel::update(users.filter(id.eq(1))) .set((name.eq("James"), surname.eq("Bond"))) .get_result(&connection); assert_eq!(Ok((1, "James".to_string(), "Bond".to_string())), updated_row);