将枚举转换为int并从MySQL的另一个表插入该int值

Question

I am Converting my Enum datatype to Integer and Also Want to Insert that perticular id to int value which in another table.

Enum Type in product_mst

measurement_unit: Enum('pair','piece') and Default value is 'pair' 

When i will convert it to integer its id should be lookup in another table.

Another Table that is measurement_unit_mst

measurement_unit_id | unit_name |
        5              pair
        8              piece

It should be 5 for pair and also 8 for piece, when i convert it to integer .

Normally, it takes 1 and 2 for 'pair' and 'piece' that i don't want it.

I applied below three query which working for me.

ALTER TABLE `product_mst` CHANGE `measurement_unit` `measurement_unit` INT(11) NULL DEFAULT '0';
UPDATE product_mst set measurement_unit=5 where measurement_unit=1;
UPDATE product_mst set measurement_unit=8 where measurement_unit=2;

Any other Better option for this?

Thank You.

Answer 1

If your data table is the central part in your design, then it might be better to initalize the enum with the corresponding numbers of the table so you can omit the conversion:

abstract class MeasurementUnit
{
    const pair = 5;
    const piece = 8;
    // etc.
}

Access like

$pair = MeasurementUnit::pair;