Ghost/core/server/data/migrations/versions/2.15/1-add-type-column-to-integrations.js

const logging = require('../../../../../shared/logging');
const commands = require('../../../schema').commands;
const table = 'integrations';
const newColumnNames = [
    'type'
];

function printResult(operation, columnName) {
    return `${operation} column ${columnName} in ${table} table`;
}

module.exports.up = (options) => {
    const connection = options.connection;
    return Promise.map(newColumnNames, (newColumnName) => {
        return connection.schema.hasColumn(table, newColumnName)
            .then((exists) => {
                if (exists) {
                    logging.warn(printResult('Adding', newColumnName));
                    return;
                }
                logging.info(printResult('Adding', newColumnName));
                return commands.addColumn(table, newColumnName, connection);
            });
    });
};

module.exports.down = (options) => {
    const connection = options.connection;
    return Promise.map(newColumnNames, (newColumnName) => {
        return connection.schema.hasColumn(table, newColumnName)
            .then((exists) => {
                if (!exists) {
                    logging.warn(printResult('Dropping', newColumnName));
                    return;
                }
                logging.info(printResult('Dropping', newColumnName));
                return commands.dropColumn(table, newColumnName, connection);
            });
    });
};