Macro diesel::no_arg_sql_function
source ยท macro_rules! no_arg_sql_function { ($type_name:ident, $return_type:ty) => { ... }; ($type_name:ident, $return_type:ty, $docs:expr) => { ... }; ($type_name:ident, $return_type:ty, $docs:expr, $($constraint:ident)::+) => { ... }; }
๐Deprecated since 2.0.0: Use
sql_function!
instead. See CHANGELOG.md
for migration instructionsExpand description
Declare a 0 argument SQL function for use in your code. This will generate a
unit struct, which is an expression representing calling this function. See
now
for example output. now
was
generated using:
no_arg_sql_function!(now, sql_types::Timestamp, "Represents the SQL NOW() function");
You can optionally pass the name of a trait, as a constraint for backends which support the function.