NodeJS db-migrate TypeError: Cannot read property '1' of null

Question

I've just installed the nodejs package db-migrate into an existing nodejs project. Everything seems to be configured correctly in regards to the connection to the DB.

Database.json:

{
    "development": "postgres://blabla",
    "production": "postgres://blabla"
}

Migration:

var dbm = global.dbm || require('db-migrate');
var type = dbm.dataType;

exports.up = function(db, callback) {
    db.createTable('users', {
        id: { type: 'int', primaryKey: true, autoIncrement: true },
        username: { type: 'string', unique: true }
        }, callback);
};

exports.down = function(db, callback) {
    db.dropTable('users', callback);
};

Whenever I try to run db-migrate up (with any variation of parameters like specifying the database file, the migration, the number of migrations, etc), the command raises an error every time:

[ERROR] TypeError: Cannot read property '1' of null
   at Class.extend.parseName (C:\Users\test\Projects\nodejs\cirio-crm\node_modules\db-migrate\lib\skeleton.js:162:17)
   at Class.Skeleton.extend.init (C:\Users\test\Projects\nodejs\cirio-crm\node_modules\db-migrate\lib\migration.js:35:24)
   at Class.prototype.(anonymous function) [as init] (C:\Users\test\Projects\nodejs\cirio-crm\node_modules\db-migrate\lib\class.js:36:24)
   at new Class (C:\Users\test\Projects\nodejs\cirio-crm\node_modules\db-migrate\lib\class.js:49:17)
   at C:\Users\test\Projects\nodejs\cirio-crm\node_modules\db-migrate\lib\migration.js:312:14
   at Array.map (native)
   at C:\Users\test\Projects\nodejs\cirio-crm\node_modules\db-migrate\lib\migration.js:311:35
   at FSReqWrap.oncomplete (fs.js:95:15)

I've tried renaming the table, changing the fields, messing with the CRLF line endings, installing different versions of nodejs and db-migrate, etc.

Any ideas?

cavpollo · Accepted Answer · 2018-11-15 16:45:10Z

20

After about an hour of running in circles I realized the migration was named incorrectly. Its first part only specified the date and not the time. The correct file name format to be used would be yyyyMMddhhmmss-<some text>.

Before (Bad): 20160101-testmigration

After (Good): 20160101000000-testmigration

The error could have been more explicit though...

EDIT:

As pointed out by @2Toad, one has to be careful about what is stored on the folder where migrations are supposed to be found. If you have any *.js file that doesn't follow the naming format, like a helper JS file, the same error will occur.

edited Nov 15, 2018 at 16:45

answered Feb 2, 2016 at 17:32

cavpollo

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3 Comments

Umakant Patil Over a year ago

Can you please clarify what did you changed exactly. I did run into same issue. But I don't have any migration named that way

cavpollo Over a year ago

@UmakantPatil All I did was naming the migration with the following format: yyyyMMddhhmmss-<some text>

2Toad Over a year ago

Might want to check for temp/backup/system files created by IDE/OS in the migrations folder. In my case, I had added a helper lib to the migrations folder, thinking db-migrate would only pull in files that matched the db-migrate naming convention: YYYYMMDDHHmmss-{NAME}.js. Apparently, that's not the case. db-migrate will attempt to parse all *.js files in the migrations folder

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