Macro microrm::make_index

make_index!() { /* proc-macro */ }

Defines a struct to represent a optionally-unique index on a table.

Suppose the following Entity definition is used:

#[derive(Entity,Serialize,Deserialize)]
struct SystemUser {
    username: String,
    hashed_password: String
}

We can now use make_index! to define an index on the username field:

make_index!(SystemUsernameIndex, SystemUserColumns::Username)

This index can be made unique by adding a ! prior to the type name, as:

make_index!(!SystemUsernameUniqueIndex, SystemUserColumns::Username)