rs_example.rs

pub fn rename_blueprint(
    &mut self,
    ctx: &mut Context,
    db_handle: &Transaction,
    blueprint_id: Uuid,
    new_name: &str,
) -> Result<(), DataError> {
    ctx.debug(format!("Renaming blueprint {} to {}", blueprint_id, new_name));
    
    self.assert_blueprint_exists(ctx, db_handle, blueprint_id)?;
    
    let mut stmt = db_handle.prepare("UPDATE `blueprints` SET `name` = ? WHERE `id` == ?")
        .on_err(|_| ctx.err("Unable to prepare update statement"))?;
    
    let changed_rows = stmt.execute(params![new_name.to_string(), blueprint_id])
        .on_err(|_| ctx.err("Unable to update name in database"))?;
    
    if changed_rows != 1 {
        ctx.err(format!("Invalid amount of rows changed: {}", changed_rows));
        return Err(DataError::InvalidChangeCount { changes: changed_rows, expected_changes: 1 });
    }
    
    ctx.blueprint_renamed(blueprint_id, new_name);
    
    Ok(())
}

pub fn rename_attribute(
    &mut self,
    ctx: &mut Context,
    db_handle: &Transaction,
    attribute_id: Uuid,
    new_name: &str,
) -> Result<(), DataError> {
    ctx.debug(format!("Renaming attribute {} to {}", attribute_id, new_name));
    
    self.assert_attribute_exists(ctx, db_handle, attribute_id)?;
    
    let mut stmt = db_handle.prepare("UPDATE `attributes` SET `name` = ? WHERE `id` == ?")
        .on_err(|_| ctx.err("Unable to prepare update statement"))?;
    
    let changed_rows = stmt.execute(params![new_name.to_string(), attribute_id])
        .on_err(|_| ctx.err("Unable to update name in database"))?;
    
    if changed_rows != 1 {
        ctx.err(format!("Invalid amount of rows changed: {}", changed_rows));
        return Err(DataError::InvalidChangeCount { changes: changed_rows, expected_changes: 1 });
    }
    
    ctx.attribute_renamed(attribute_id, new_name);
    
    Ok(())
}