const _ = require('lodash') /* global WIKI */ exports.up = async knex => { let sqlVersionDate = '' switch (WIKI.config.db.type) { case 'postgres': case 'mssql': sqlVersionDate = 'UPDATE "pageHistory" h1 SET "versionDate" = COALESCE((SELECT prev."createdAt" FROM "pageHistory" prev WHERE prev."pageId" = h1."pageId" AND prev.id < h1.id ORDER BY prev.id DESC LIMIT 1), h1."createdAt")' break case 'mysql': // -> Fix for 2.2.50 failed migration const pageHistoryColumns = await knex.schema.raw('SHOW COLUMNS FROM pageHistory') if (_.some(pageHistoryColumns[0], ['Field', 'versionDate'])) { console.info('MySQL 2.2.50 Migration Fix - Dropping failed versionDate column...') await knex.schema.raw('ALTER TABLE pageHistory DROP COLUMN versionDate') console.info('versionDate column dropped successfully.') } sqlVersionDate = `UPDATE pageHistory AS h1 INNER JOIN pageHistory AS h2 ON h2.id = (SELECT prev.id FROM (SELECT * FROM pageHistory) AS prev WHERE prev.pageId = h1.pageId AND prev.id < h1.id ORDER BY prev.id DESC LIMIT 1) SET h1.versionDate = h2.createdAt` break case 'mariadb': sqlVersionDate = `UPDATE pageHistory AS h1 INNER JOIN pageHistory AS h2 ON h2.id = (SELECT prev.id FROM pageHistory AS prev WHERE prev.pageId = h1.pageId AND prev.id < h1.id ORDER BY prev.id DESC LIMIT 1) SET h1.versionDate = h2.createdAt` break } await knex.schema .alterTable('pageHistory', table => { table.string('versionDate').notNullable().defaultTo('') }) .raw(sqlVersionDate) } exports.down = knex => { }