Manually set the default values for the OpenID Connect columns.

There is a Knex issue ( https://github.com/knex/knex/issues/2649 ) that prevents .defaultTo from working for text columns.

backend/migrations/20200523114256_openid_default_values.js

@@ -0,0 +1,36 @@
+const migrate_name = 'openid_default_values';
+const logger       = require('../logger').migrate;
+
+/**
+ * Migrate
+ *
+ * @see http://knexjs.org/#Schema
+ *
+ * @param   {Object}  knex
+ * @param   {Promise} Promise
+ * @returns {Promise}
+ */
+exports.up = function (knex/*, Promise*/) {
+	logger.info('[' + migrate_name + '] Migrating Up...');
+
+	return knex.schema.raw('ALTER TABLE proxy_host ALTER openidc_redirect_uri SET DEFAULT \'\'')
+		.then(() => knex.schema.raw('ALTER TABLE proxy_host ALTER openidc_discovery SET DEFAULT \'\''))
+		.then(() => knex.schema.raw('ALTER TABLE proxy_host ALTER openidc_auth_method SET DEFAULT \'client_secret_post\''))
+		.then(() => knex.schema.raw('ALTER TABLE proxy_host ALTER openidc_client_id SET DEFAULT \'\''))
+		.then(() => knex.schema.raw('ALTER TABLE proxy_host ALTER openidc_client_secret SET DEFAULT \'\''))
+		.then(() => {
+			logger.info('[' + migrate_name + '] proxy_host Table altered');
+		});
+};
+
+/**
+ * Undo Migrate
+ *
+ * @param   {Object}  knex
+ * @param   {Promise} Promise
+ * @returns {Promise}
+ */
+exports.down = function (knex, Promise) {
+	logger.warn('[' + migrate_name + '] You can\'t migrate down this one.');
+	return Promise.resolve(true);
+};