bookshelf js save() command not updating rows in postgresql db - postgresql

Question

JS beginner trying to get a PostgreSQL DB talking to express.js through bookshelf.js.
github: https://github.com/duskyshelf/bookers-academy/blob/master/booker.js
var knex = require('knex')({
client: 'pg',
connection: "postgres://localhost/bookers"
});
var bookshelf = require('bookshelf')(knex);
var User = bookshelf.Model.extend({
tableName: 'users'
});
var bob = new User({id: 2});
bob.save()
bookshelf.js seems unable to add any content to the db.
Current error message is: "Unhandled rejection CustomError: No Rows Updated'

Answer 1

When you create your model providing your own id, like in
var bob = new User({id: 2});
Bookshelf assumes it is an update operation, not an insertion. It sets the internal isNew attribute to false, and when save() is invoked, instead of INSERT INTO user(id, ...) VALUES (2, ...);, it executes UPDATE user ... WHERE id = 2;.
If there is no user with id = 2 the update will almost silently DO NOTHING.
To force an insert you must change the save() to:
bob.save(null, {method: 'insert'});
Bookshelf save() documentation describes this behavior.

Answer 2

Did you create a User table using knex? One potential problem I can think of is that you do not have any logic that actually creates the table for your Postgres DB. Here is some sample code that will create a table in your database if it doesn't yet exist.
bookshelf.knex.schema.hasTable('User').then(function(exists) {
if(!exists) {
bookshelf.knex.schema.createTable('User'), function(user) {
user.increments('id').primary();
user.timestamps();
}).then(function(table){
console.log('Created Table:', table);
});
}
});

Answer 3

new User({id: 2}).
save().
then((model) => {
res.json({ success: true });
});

Answer 4

No no! new User returns a PROMISE! You can't use it like that.
Try
new User().save()