From 042eb88fd74033b9b606189b626f3f0a11a3e2b1 Mon Sep 17 00:00:00 2001 From: Vincent Ambo Date: Sun, 8 Apr 2018 15:48:56 +0200 Subject: feat(migrations): Add posts & threads tables --- .../00000000000000_diesel_initial_setup/up.sql | 36 ++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 migrations/00000000000000_diesel_initial_setup/up.sql (limited to 'migrations/00000000000000_diesel_initial_setup/up.sql') diff --git a/migrations/00000000000000_diesel_initial_setup/up.sql b/migrations/00000000000000_diesel_initial_setup/up.sql new file mode 100644 index 000000000000..d68895b1a7b7 --- /dev/null +++ b/migrations/00000000000000_diesel_initial_setup/up.sql @@ -0,0 +1,36 @@ +-- This file was automatically created by Diesel to setup helper functions +-- and other internal bookkeeping. This file is safe to edit, any future +-- changes will be added to existing projects as new migrations. + + + + +-- Sets up a trigger for the given table to automatically set a column called +-- `updated_at` whenever the row is modified (unless `updated_at` was included +-- in the modified columns) +-- +-- # Example +-- +-- ```sql +-- CREATE TABLE users (id SERIAL PRIMARY KEY, updated_at TIMESTAMP NOT NULL DEFAULT NOW()); +-- +-- SELECT diesel_manage_updated_at('users'); +-- ``` +CREATE OR REPLACE FUNCTION diesel_manage_updated_at(_tbl regclass) RETURNS VOID AS $$ +BEGIN + EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s + FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl); +END; +$$ LANGUAGE plpgsql; + +CREATE OR REPLACE FUNCTION diesel_set_updated_at() RETURNS trigger AS $$ +BEGIN + IF ( + NEW IS DISTINCT FROM OLD AND + NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at + ) THEN + NEW.updated_at := current_timestamp; + END IF; + RETURN NEW; +END; +$$ LANGUAGE plpgsql; -- cgit 1.4.1