grorm 0.1.1

Goroutine-native ORM for Rust with multi-database support
Documentation 
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use super::*;

pub struct DefaultDriver {
    connected: bool,
}

impl DefaultDriver {
    pub fn new() -> Self {
        DefaultDriver { connected: false }
    }
}

impl DatabaseDriver for DefaultDriver {
    fn db_type(&self) -> DatabaseType {
        DatabaseType::None
    }

    fn connect(&mut self, _config: &ConnectionConfig) -> Result<(), Error> {
        self.connected = true;
        Ok(())
    }

    fn close(&mut self) -> Result<(), Error> {
        self.connected = false;
        Ok(())
    }

    fn query(&mut self, _sql: &str, _params: &[Parameter]) -> Result<QueryResult, Error> {
        Ok(QueryResult {
            rows: Vec::new(),
            affected_rows: 0,
            last_insert_id: None,
        })
    }

    fn execute(&mut self, _sql: &str, _params: &[Parameter]) -> Result<u64, Error> {
        Ok(0)
    }

    fn prepare(&mut self, _name: &str, _sql: &str) -> Result<(), Error> {
        Ok(())
    }

    fn execute_prepared(
        &mut self,
        _name: &str,
        _params: &[Parameter],
    ) -> Result<QueryResult, Error> {
        Ok(QueryResult {
            rows: Vec::new(),
            affected_rows: 0,
            last_insert_id: None,
        })
    }

    fn begin(&mut self) -> Result<(), Error> {
        Ok(())
    }

    fn commit(&mut self) -> Result<(), Error> {
        Ok(())
    }

    fn rollback(&mut self) -> Result<(), Error> {
        Ok(())
    }

    fn escape_identifier(&self, ident: &str) -> String {
        format!("`{}`", ident.replace('`', "``"))
    }

    fn last_insert_id(&mut self) -> Result<Option<i64>, Error> {
        Ok(None)
    }

    fn is_connected(&self) -> bool {
        self.connected
    }

    fn version(&mut self) -> Result<String, Error> {
        Ok("default None version".to_string())
    }

    fn limit_offset_clause(&self, limit: Option<usize>, offset: Option<usize>) -> String {
        match (limit, offset) {
            (Some(l), Some(o)) => format!("LIMIT {}, {}", o, l),
            (Some(l), None) => format!("LIMIT {}", l),
            (None, Some(o)) => format!("LIMIT {}, 18446744073709551615", o),
            (None, None) => String::new(),
        }
    }

    fn placeholder_style(&self) -> PlaceholderStyle {
        PlaceholderStyle::Positional
    }
}

pub struct DefaultDriverFactory;

impl DriverFactory for DefaultDriverFactory {
    fn create(&self) -> Box<dyn DatabaseDriver> {
        Box::new(DefaultDriver::new())
    }

    fn db_type(&self) -> DatabaseType {
        DatabaseType::None
    }
}