SailsJS best practice to seed database with data before other Models are initialized

问题

There is a model that all other models assume its existence. It should be initialized before any API function is called.

The way I do this (it doesn't work):

1) Define model in api/models, let's call it Location.js

2) Add the following to bootstrap.js

    var Locations = require('../api/models/Locations.js');

    module.exports.bootstrap = function (cb) {

      // seed the database with Locations
        var locationsObj = {
            country: 'Australia',
            states: ['Brisbane', 'Perth', 'Sydney']
        };
        Location.create(locationsObj, function locationsObj(err, locations) {
            if (err) {
                cb(err);
            }
            console.log('locations created: ', locations);
        });
  }

Question 1 Is it the right way to do initial database seeding?

I get this error:

Locations.create(locationsObj, function locationsObj(err, locations) {
          ^
TypeError: Object #<bject> has no method 'create'

Question 2 How does the cb function of bootstrap work? what if there as an error, what to do?

回答1:

The sails models are globally available; so you don't need to require at bootstrap.js.

This is what I use to seed my database. (See the links I enclose to go to the gists)

Include seed function at config/models.js. The methods you declare in this file will be extended to all your models. Link: Seed method gist
Define de data the seed will consume in your model Link: Model's seed data
Call the seed method in config/bootstrap.js using async. Link: Calling method

UPDATE

Have a look at this threat also: Best way to migrate table changes to production sailsjs tables

回答2:

From Cannot unit test my model in sailsjs:

"Once Sails app is lifted, you will have your models available automatically...

And in your case, your first line overrides the User model which would be otherwise constructed by Sails.js, that's why even though you have an object it's not a Waterline model."

回答3:

I know this is old but, for completeness:

You set

var Locations = ...

But but you call

Location.create()

(no 's') so you just have a typo.

来源：https://stackoverflow.com/questions/22941765/sailsjs-best-practice-to-seed-database-with-data-before-other-models-are-initial

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sails.js