run seeds programatically

[JohannesMerz]

is it possible to run the commands programmatically? On a quick glance it seems that run is only exposed through the binary.

Something like:

import { run } from 'mongoose-data-seed'
run('users', 'posts', 'comments').then(() => console.log('seeding done'))

[sharvit]

Hi @JohannesMerz, thank you for opening this issue.

You should be able to do something very similar to what you did.

The run method is returning an observable (not a promise), you can look here to see usage example:
https://github.com/sharvit/mongoose-data-seed/blob/master/src/bin/run/index.js#L71

Notice, i am working on a refactoring, i will continue to use observable but the inner next implementation will be different after releasing the next version.

[sharvit]

Hi @JohannesMerz,
did you manage to achieve your goal?

[JohannesMerz]

oh i guess this can be closed. I didn't quite get what you suggested above.

A section in the readme of what can be done programmatically and not through the cli would be really helpful.

[sharvit]

@JohannesMerz I shared with you the code that uses the seed method internally, I thought it can help.

You can write something like:

import { seed } from 'mongoose-data-seed';

seed().subscribe({
  next: ({ name, results }) => console.log(name, results),
  error: ({ name, error }) => console.log(name, error),
  complete: () => console.log('Completed!'),
});

You can also pass selectedSeeders array to the seed method:

const selectedSeeders = ['Users', 'Posts'];

seed(selectedSeeders).subscribe({ ... });

Let me know if I can do more to help!
I am more than happy to do so 😄

I will update the docs soon.

[JohannesMerz]

Ahh, nice! Thanks for the quick response. That clears everything up.

[zhonghuiwen]

Hi @JohannesMerz i tried running seed() in in my express app but i'm getting this error:

TypeError: Class extends value undefined is not a constructor or null

I've googed it and it seems to be some sort of cyclic reference according to this: https://stackoverflow.com/questions/37312197/node-js-v6-2-0-class-extends-is-not-a-function-error/37312355#37312355

But i'm not sure how the cyclic reference is occurring, would you know how this is happening?

class ResourceActionSeeder extends Seeder {
app_1    |                                    ^
app_1    |
app_1    | TypeError: Class extends value undefined is not a constructor or null
app_1    |     at Object.<anonymous> (/usr/src/app/seeders/resource-actions.seeder.js:9:36)
app_1    |     at Module._compile (module.js:649:30)
app_1    |     at Object.Module._extensions..js (module.js:660:10)
app_1    |     at Module.load (module.js:561:32)
app_1    |     at tryModuleLoad (module.js:501:12)
app_1    |     at Function.Module._load (module.js:493:3)
app_1    |     at Module.require (module.js:593:17)
app_1    |     at require (internal/module.js:11:18)
app_1    |     at Object.<anonymous> (/usr/src/app/md-seed-config.js:1:87)
app_1    |     at Module._compile (module.js:649:30)
app_1    |     at Object.Module._extensions..js (module.js:660:10)
app_1    |     at Module.load (module.js:561:32)
app_1    |     at tryModuleLoad (module.js:501:12)
app_1    |     at Function.Module._load (module.js:493:3)
app_1    |     at Module.require (module.js:593:17)
app_1    |     at require (internal/module.js:11:18)

This is the code from where i want to programatically seed the db

const { seed } = require('mongoose-data-seed');
...
app.get('/seeddb', (req, res, next) => {
  if (process.env.NODE_ENV === 'development') {
    seed().subscribe({
      next: ({ name, results }) => {
        log.debug(`name: ${name}`);
        log.debug(`results: ${results}`);
        res.end();
        next();
      },
      error: ({ name, error }) => {
        log.debug(`name: ${name}`);
        log.debug(`error: ${error}`);
        res.end();
        next();
      },
      complete: () => next(),
    });
  } else {
    res.status(400).send('Permission Denied');
  }
});