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knex.js + postgresql migration メモ

Last updated at Posted at 2020-05-28

knex.js を postgresql で利用する際の migration について、こうやるといいんじゃないかな的な話題をまとめていきます。(随時更新予定)

bigint な primary key

64bit にしたい場合。

exports.up = function(knex) {
    return knex.schema
        .createTable('xxxx', function (table) {
            table.specificType('id', knex.raw('BIGSERIAL PRIMARY KEY'));
        });
};

enum の up / down

up / down の行き来によって enum 型定義だけ残るので強制的に消しに行ってます。

const dropTypeStmt = 'drop type if exists xxx_type';

exports.up = function(knex) {
    return knex.schema
        .raw(dropTypeStmt)
        .createTable('xxx', function (table) {
            table.enu('state', ['a', 'b'], { useNative: true, enumName: 'xxx_type' });
        });
};

exports.down = function(knex) {
    return knex.schema
        .raw(dropTypeStmt);
};
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