Trait Driver 

pub trait Driver:
    Debug
    + Send
    + Sync
    + Sized {
    type InternalDriver: Database;

    // Required methods
    fn identifier_delimiter() -> &'static str;
    fn parameter_placeholder(index: usize) -> String;
    async fn table_exists(
        conn: &mut (impl EasyExecutor<Self> + Send + Sync),
        name: &'static str,
    ) -> Result<bool>;
    async fn create_table(
        conn: &mut (impl EasyExecutor<Self> + Send + Sync),
        table_name: &'static str,
        fields: Vec<TableField>,
        primary_keys: Vec<&'static str>,
        foreign_keys: HashMap<&'static str, (Vec<&'static str>, Vec<&'static str>, bool)>,
    ) -> Result<()>;
}

Driver backend integration.

Implement this trait for custom drivers to describe the underlying sqlx::Database and database-specific DDL helpers used by the macros and migrations.

Required Associated Types

type InternalDriver: Database

Required Methods

fn identifier_delimiter() -> &'static str

fn parameter_placeholder(index: usize) -> String

Build a parameter placeholder for the driver (index is 0-based).

async fn table_exists( conn: &mut (impl EasyExecutor<Self> + Send + Sync), name: &'static str, ) -> Result<bool>

async fn create_table( conn: &mut (impl EasyExecutor<Self> + Send + Sync), table_name: &'static str, fields: Vec<TableField>, primary_keys: Vec<&'static str>, foreign_keys: HashMap<&'static str, (Vec<&'static str>, Vec<&'static str>, bool)>, ) -> Result<()>

Create a table with the provided schema metadata.

foreign_keys:

• Key: referenced table name
• Value: local field names, referenced field names, on delete/update cascade flag

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors