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DefaultTo postgres functions

See original GitHub issue

Is there a way to set a defaultTo to a column a postgresql function? For example If I want to have an uuid column auto generate using uuid_generate_v4().

I’m currently running this as a separate migration setting the default using raw sql. Is there any way to do it as part of the migration itself?

For example

t.uuid('transact_id').defaultTo(default.uuid_generate_v4());

Issue Analytics

State:
Created 7 years ago
Comments:5 (3 by maintainers)

Top GitHub Comments

9reactions

rhys-vdwcommented, Jun 27, 2016

Have you tried:

t.uuid('transact_id').defaultTo(knex.raw('uuid_generate_v4()');

4reactions

paulbjensencommented, Jan 29, 2018

Note to add, for Postgres 9 and greater, you will need to run this SQL on the database to enable using uuid_generate_v4() functions:

CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

This resolves an issue where running a migration on a PostgreSQL DB errors on a message like “function uuid_generate_v4() does not exist”.

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