TypeError: classes[key] is not a constructor

[gregg-cbs]

Hi,

When running migrate:up - we are getting the error TypeError: classes[key] is not a constructor. The error is coming from node_modules/mongo-migrate-ts/lib/migrations.ts 38:19.

This error could be due to something in our code but we cannot see where or what because the migrations.ts is not forwarding the error. We have removed all our code from migrations and still see this error.

Our config is as follows and we can confirm this worked at some point but as of late it started throwing the above error.

package.json:

  "scripts": {
    "migrate:up": "ts-node ./src/api/common/database/migrations/index.ts up",
    "migrate:down": "ts-node ./src/api/common/database/migrations/index.ts down"
  },

// file: /migrations/index.ts
import { mongoMigrateCli } from "mongo-migrate-ts"; // v1.6.2

const config = {
  db: "our_db",
  mongoUri: "mongodb+srv://"
};

mongoMigrateCli({
  database: config.db,
  uri: config.mongoUri,
  migrationsDir: '.', // Directory where your migration files are stored
  migrationsCollection: 'migrations', // Collection to store migration status
});

Full Error:

✖ Error executing migrations
Example app listening on port 3000
TypeError: classes[key] is not a constructor
    at /Users/yser/Documents/projects/cbs/project-v3/node_modules/.pnpm/mongo-migrate-ts@1.6.2_mongodb@6.8.0/node_modules/mongo-migrate-ts/lib/migrations.ts:38:19
    at Array.map (<anonymous>)
    at loadMigrationFile (/Users/yser/Documents/projects/cbs/project-v3/node_modules/.pnpm/mongo-migrate-ts@1.6.2_mongodb@6.8.0/node_modules/mongo-migrate-ts/lib/migrations.ts:34:6)
    at async Promise.all (index 2)
    at async loadMigrations (/Users/yser/Documents/projects/cbs/project-v3/node_modules/.pnpm/mongo-migrate-ts@1.6.2_mongodb@6.8.0/node_modules/mongo-migrate-ts/lib/migrations.ts:51:22)
    at async up (/Users/yser/Documents/projects/cbs/project-v3/node_modules/.pnpm/mongo-migrate-ts@1.6.2_mongodb@6.8.0/node_modules/mongo-migrate-ts/lib/commands/up.ts:38:27)
    at async Command.<anonymous> (/Users/yser/Documents/projects/cbs/project-v3/node_modules/.pnpm/mongo-migrate-ts@1.6.2_mongodb@6.8.0/node_modules/mongo-migrate-ts/lib/cli.ts:57:11)
 ELIFECYCLE  Command failed with exit code 1.

[revolution64]

I had the same error when I was exporting multiple functions from the migration class. Made sure i'm only exporting the class that implements the MigrationInterface and it worked again for me.

[naffarn]

Worth noting that I also had this issue when migrating across to this package from migrate-mongo, and my issue was that my old JS migrations were getting picked up.

Solution was to add globPattern: '**/*.ts' to my CLI options in index.ts

[ChaitanyaKadamati]

I face this issue... so what i do is -
add an additional check at begin of all the util functions

if(! 1st param)
{
return;
}

And ensure - all the functions are
export function name()
vs
const name = () => {}