错误：种子文件无效：seed.js必须具有种子功能

Question

我正在尝试将一些数据播种到数据库中。种子文件用Typescript编写，然后编译成Javascript以便knex运行。当我尝试运行种子文件时，我得到标题中列出的错误。

Error: Invalid seed file: seed.js must have a seed function

错误本身表明代码没有种子函数，我尝试改变JS文件本身而不是编译TS文件，并尝试了多种方式返回连接。

这是我编写的TS文件（seed.ts）;

const {
  patientData, gpData, ailmentData, surgeryData,
} = require('../data/index.js');

const seed = (knex: any, Promise: any) => knex.migrate
  .rollback()
  .then(() => knex.migrate.latest())
  .then(() => {
    const surgeries = knex('surgeries')
    .insert(surgeryData)
    const patients = knex('patients').insert(patientData).returning('*');
    const gps = knex('gps').insert(gpData).returning('*')
    return Promise.all([surgeries,patients, gps])
  })
  .then(([patients, gps]) => {
    console.log(patients, '<-- patients')
    console.log(gps, '<-- GPs')
    // const ailments = knex('ailments').insert
    // (ailmentData).returning('*')
    return knex('surgeries', 'gps', 'patients')
      .returning('*')
  })

这是编译的输出（seed.js）;

var _a = require('../data/index.js'), patientData = _a.patientData, gpData = _a.gpData, ailmentData = _a.ailmentData, surgeryData = _a.surgeryData;
var seed = function (knex, Promise) { return knex.migrate
    .rollback()
    .then(function () { return knex.migrate.latest(); })
    .then(function () {
    var surgeries = knex('surgeries')
        .insert(surgeryData);
    var patients = knex('patients').insert(patientData).returning('*');
    var gps = knex('gps').insert(gpData).returning('*');
    return Promise.all([surgeries, patients, gps]);
})
    .then(function (_a) {
    var patients = _a[0], gps = _a[1];
    console.log(patients, '<-- patients');
    console.log(gps, '<-- GPs');
    // const ailments = knex('ailments').insert
    // (ailmentData).returning('*')
    return knex('surgeries', 'gps', 'patients')
        .returning('*');
}); };

Answer 1

我需要将const从我的TS文件更改为exports，如下所示。

const {
  patientData, gpData, ailmentData, surgeryData,
} = require('../data/index.js');

exports.seed = (knex: any, Promise: any) => knex.migrate
  .rollback()
  .then(() => knex.migrate.latest())
  .then(() => {
    const surgeries = knex('surgeries')
    .insert(surgeryData)
    const patients = knex('patients').insert(patientData).returning('*');
    const gps = knex('gps').insert(gpData).returning('*')
    return Promise.all([surgeries,patients, gps])
  })
  .then(([patients, gps]) => {
    console.log(patients, '<-- patients')
    console.log(gps, '<-- GPs')
    // const ailments = knex('ailments').insert
    // (ailmentData).returning('*')
    return knex('surgeries', 'gps', 'patients')
      .returning('*')
  })