Knex: Question regarding use of then() with Knex.js and Postgres
I am trying to use then() to chain my create table and insertion of rows.
The table is created but no insertion happens (no error is caught).
Can someone tell me where I am wrong?
Thanks
MN
var Promise = require('bluebird');
var Knex = require('knex');
Knex.knex = Knex.initialize({
client: 'pg',
connection: {
…
},
debug: true
});
var knex = require('knex').knex;
knex.schema.createTable('department', function(table) {
table.increments('department_id').primary().notNullable();
table.string('department_name', 80).unique().notNullable();
table.string('building_name', 40);
}).then (function() {
console.log('department table has been created');
knex('department').insert(
[{department_name:'Nano Technology', building_name:'block-A'},
{department_name:'Mechanical Engineering', building_name:'block-C'}],
'department_id'
);
}).then(function() {
console.log('departments inserted');
}).catch(function(e) {
console.log(e);
});
ghost
All 3 comments
You have to either return your knex insert statement, or add handlers to it (by using then or catch/ caught), else you are just creating a builder instance but are not actually executing the query. When you call methods like insert, select, frometc. - basically every method on the query builder - it will only modify its internal state, but not actually execute the query. That will only happen when you add one or more handlers to the instance using then, catch/caught, lastly/finally,tap or exec, because this will then create the actual Promise, which sends the query to the database client.
johanneslumpe
on 16 Jan 2014
Knex and Bookshelf are great. Thanks a lot
- MN
On 16 Jan 2014, at 13:17, Johannes Lumpe [email protected] wrote:
You have to either return your knex insert statement, or add handlers to it (by using then or catch/ caught), else you are just creating a builder instance but are not actually executing the query. When you call methods like insert, select, frometc. - basically every method on the query builder - it will only modify its internal state, but not actually execute the query. That will only happen when you add one or more handlers to the instance using then, catch/caught, lastly/finally,tap or exec, because this will then create the actual Promise, which sends the query to the database client.
—
Reply to this email directly or view it on GitHub.
ghost
on 16 Jan 2014
You're welcome!
johanneslumpe
on 16 Jan 2014
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Most helpful comment
You have to either
returnyourknexinsert statement, or add handlers to it (by usingthenorcatch/caught), else you are just creating abuilderinstance but are not actually executing the query. When you call methods likeinsert,select,frometc. - basically every method on the query builder - it will only modify its internal state, but not actually execute the query. That will only happen when you add one or more handlers to the instance usingthen,catch/caught,lastly/finally,taporexec, because this will then create the actualPromise, which sends the query to the database client.