Loopback script console won't exit
I am writing a Loopback script that should be called by cron.
To get an object app
, I do
var app = require('./server/server');
# Script logic
console.log('done');
However, the script doesn't exit as soon as it finishes executing. How do I get him to exit?
Link: http://docs.strongloop.com/display/public/LB/Working+with+LoopBack+objects
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Finally, the cause of this problem was found out.
The problem is with the database connection (in my case mongodb via loopback-connector-mongodb ) is still connected.
To disconnect the database connection and subsequently exit the console script
var app = require('./server/server');
app.dataSources.DATASOURCENAME.disconnect();
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I read in some places that the problem is with the http server preventing the script from closing.
I ended up with a module that doesn't even start the http server, I named it loopback-init.js
and I usually import it from migrations and scripts (the important part is the custom callback passed to boot()
):
'use strict';
const Promise = require('bluebird');
const loopback = require('loopback');
const boot = require('loopback-boot');
const logger = require('logger');
const app = loopback();
boot(app, __dirname + '/../server', err => {
if (err) throw err;
logger.debug('Loopback initialized.');
app.start = function() {
app.close = function(cb) {
app.removeAllListeners('started');
app.removeAllListeners('loaded');
if (cb) cb();
};
};
});
const autoMigrate = Promise.promisify(
app.dataSources.db.automigrate,
{context: app.dataSources.db}
);
app.autoMigrate = autoMigrate;
module.exports = app;
and my db-migrate scripts look like this:
'use strict';
var dbm;
var type;
var seed;
/**
* We receive the dbmigrate dependency from dbmigrate initially.
* This enables us to not have to rely on NODE_PATH.
*/
exports.setup = function(options, seedLink) {
dbm = options.dbmigrate;
type = dbm.dataType;
seed = seedLink;
};
exports.up = function(db) {
const lb = require('loopback-init');
return lb.autoMigrate('Item')
.then(lb.close, lb.close);
};
exports.down = function(db) {
return db.dropTable('item');
};
exports._meta = {
"version": 1
};
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