knex 迁移为枚举创建类型 thows 类型已存在

Question

我正在尝试更改表中的列以将 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，我收到此错误类型"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

看起来 knex 中存在一个错误，导致在更改此类列时创建类型查询被添加两次。

\n\n

https://runkit.com/embed/xqtl8p2knhi8

\n\n

const Knex = require(\'knex\');\n\nconst knex = Knex({\n  client: \'pg\',\n});\n\nknex.schema.alterTable(\'appointments\', table => {\n    table.enu(\'type\', [\'video\', \'physical\'], { useNative: true, enumName: \'request_type\' }).alter();\n}).toSQL()\n\n/*\n  Creates SQL:\n\n0: Object {bindings: [], sql: "create type \\"request_type\\" as enum (\'video\', \'physical\')"}\n1: Object {bindings: [], sql: "create type \\"request_type\\" as enum (\'video\', \'physical\')"}\n2: Object {bindings: [], sql: "alter table \\"appointments\\" alter column \\"type\\" drop default"}\n3: Object {bindings: [], sql: "alter table \\"appointments\\" alter column \\"type\\" drop not null"}\n4: Object {bindings: [], \xe2\x80\xa6}\n*/\n

\n