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ProgBlog/app/migration_helpers.js

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2016-02-24 14:01:10 -05:00
'use strict';
/**
* Migration helper methods
* @type {Object}
*/
module.exports = {
get_db_type(knex) {
switch(knex.client.config.client) {
case 'postgresql':
case 'postgres':
case 'pg':
return 'pg';
default:
return knex.client.config.client;
}
},
pg_timestamp_update_function () {
return `CREATE OR REPLACE FUNCTION progblog_update_modified_column()
RETURNS TRIGGER AS $$
BEGIN
NEW.updated_at = now();
RETURN NEW;
END;
$$ language 'plpgsql';`;
},
pg_create_timestamp_update_trigger(table) {
return `CREATE TRIGGER update_${table}_modtime
BEFORE UPDATE ON "${table}"
FOR EACH ROW
EXECUTE PROCEDURE progblog_update_modified_column();`;
},
pg_delete_timestamp_update_trigger(table) {
return `DROP TRIGGER IF EXISTS update_${table}_modtime ON "${table}";`;
},
sqlite3_create_timestamp_update_trigger(table) {
return `CREATE TRIGGER IF NOT EXISTS [UpdateModified]
BEFORE UPDATE ON "${table}"
FOR EACH ROW
BEGIN
UPDATE "${table}" SET updated_at = CURRENT_TIMESTAMP WHERE id = old.id;
END`;
},
sqlite3_delete_timestamp_update_trigger() {
return `DROP TRIGGER IF EXISTS [UpdateModified]`;
}
};