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authorBryan Newbold <bnewbold@robocracy.org>2018-05-13 23:58:30 -0700
committerBryan Newbold <bnewbold@robocracy.org>2018-05-13 23:58:30 -0700
commitb61f15156a000c3f156af3d0fc809ca32912af34 (patch)
tree9eadaea5593929ada9977c55c5951ad4318d6166 /rust/migrations/00000000000000_diesel_initial_setup/up.sql
parent9c05b0848f2ed0047544e2859d5c50d1739e45b0 (diff)
downloadfatcat-b61f15156a000c3f156af3d0fc809ca32912af34.tar.gz
fatcat-b61f15156a000c3f156af3d0fc809ca32912af34.zip
add scratch rust stuff
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+-- 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;
+