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fix(migrations): don't run with foreign keys activated

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This PR deactivates and reactivates the foreign_keys in the DB for the duration of all migrations.
This prevents a cascade of deletion, when table columns are changed and tables get recreated by sequelize.

Fixes #2809

Signed-off-by: Philip Molares <philip.molares@udo.edu>
This commit is contained in:
Philip Molares 2022-11-06 20:37:49 +01:00
parent 912bea3e23
commit 638c2f6740
1 changed files with 27 additions and 2 deletions
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29
lib/models/index.js
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@ -9,6 +9,7 @@ const Umzug = require('umzug')
// core
const config = require('../config')
const logger = require('../logger')
const {isSQLite} = require("../utils");
const dbconfig = cloneDeep(config.db)
dbconfig.logging = config.debug
@ -80,14 +81,38 @@ const umzug = new Umzug({
db.runMigrations = async function runMigrations () {
// checks migrations and run them if they are not already applied
// exit in case of unsuccessful migrations
await umzug.up().catch(error => {
const savepointName = 'migration';
try {
if (isSQLite(sequelize)) {
// Deactivate foreign_keys for sqlite, so that sequelize does not accidentally delete data when recreating tables via cascading delete.
// See https://github.com/hedgedoc/hedgedoc/issues/2809
await sequelize.query('PRAGMA foreign_keys = OFF;')
await this.sequelize.query(`SAVEPOINT ${savepointName};`);
}
await umzug.up()
if (isSQLite(sequelize)) {
// Run a foreign keys integrity check
const foreignKeyCheckResult = await sequelize.query('PRAGMA foreign_key_check;')
if (foreignKeyCheckResult.length > 0) {
throw Error(`Foreign key violations detected: ${JSON.stringify(foreignKeyCheckResult, null, 2)}`);
}
await this.sequelize.query(`RELEASE ${savepointName};`, options);
}
} catch(error) {
if (isSQLite(sequelize)) {
await this.sequelize.query(`ROLLBACK TO ${savepointName};`)
}
logger.error(error)
logger.error(`Database migration failed.
This can be the result of upgrading from quite old versions and requires manual database intervention.
See https://docs.hedgedoc.org/guides/migration-troubleshooting/ for help.
Exiting…`)
process.exit(1)
})
} finally {
if (isSQLite(sequelize)) {
await sequelize.query('PRAGMA foreign_keys = ON;')
}
}
logger.info('All migrations performed successfully')
}