knex migration create type for enum 抛出类型已经存在

Question

我正在尝试更改 table 中的一列以将 knex 枚举修改为本机类型以利用 Postgres 的类型系统，当我执行迁移时出现此错误类型 "request_type" already exists, 知道这里发生了什么吗？

export async function up(knex: Knex): Promise<any> {
  return knex.schema.alterTable('appointments', table => {
    table.enu('type', ['video', 'physical'], { useNative: true, enumName: 'request_type' }).alter();
  });
}

export async function down(knex: Knex): Promise<any> {
  return knex.schema
    .alterTable('appointments', table => {
      table.dropColumn('type');
    })
    .then(() => knex.raw('CREATE TYPE request_type AS ENUM("video", "physical")'))
    .then(() => knex.raw('drop type request_type'));
}

Answer 1

knex 中似乎存在错误，导致在像那样更改列时添加两次创建类型查询。

https://runkit.com/embed/xqtl8p2knhi8

const Knex = require('knex');

const knex = Knex({
  client: 'pg',
});

knex.schema.alterTable('appointments', table => {
    table.enu('type', ['video', 'physical'], { useNative: true, enumName: 'request_type' }).alter();
}).toSQL()

/*
  Creates SQL:

0: Object {bindings: [], sql: "create type \"request_type\" as enum ('video', 'physical')"}
1: Object {bindings: [], sql: "create type \"request_type\" as enum ('video', 'physical')"}
2: Object {bindings: [], sql: "alter table \"appointments\" alter column \"type\" drop default"}
3: Object {bindings: [], sql: "alter table \"appointments\" alter column \"type\" drop not null"}
4: Object {bindings: [], …}
*/

knex migration create type for enum 抛出类型已经存在

knex migration creat type for enum thows type already exists

postgresql

migration

database-migration

knex.js