{"record":{"id":"7204d6403ea53ea6","repo":"remix-run/remix","slug":"postgres-connection-string-must-be-a-valid-url-to","errorCode":null,"errorMessage":"Postgres connection string must be a valid URL to resolve the maintenance database","messagePattern":"Postgres connection string must be a valid URL to resolve the maintenance database","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/data-table-postgres/src/lib/driver.ts","lineNumber":531,"sourceCode":"  }\n\n  return database\n}\n\nfunction replaceDatabaseInConnectionString(\n  connectionString: string | undefined,\n  database: string,\n): string | undefined {\n  if (!connectionString) {\n    return undefined\n  }\n\n  let url: URL\n\n  try {\n    url = new URL(connectionString)\n  } catch (cause) {\n    throw new Error(\n      'Postgres connection string must be a valid URL to resolve the maintenance database',\n      { cause },\n    )\n  }\n\n  url.pathname = '/' + encodeURIComponent(database)\n  return url.toString()\n}\n\nfunction resolveDatabaseNameFromConnectionString(\n  connectionString: string | undefined,\n): string | undefined {\n  if (!connectionString) {\n    return undefined\n  }\n\n  try {\n    let url = new URL(connectionString)","sourceCodeStart":513,"sourceCodeEnd":549,"githubUrl":"https://github.com/remix-run/remix/blob/9696913134be3a4423513d2775f7b31d6917c049/packages/data-table-postgres/src/lib/driver.ts#L513-L549","documentation":"When deriving a maintenance-database connection string, the driver must swap the database path inside the URL via the URL API. If the configured connectionString is not parseable as a URL, this error is thrown with the underlying parse failure as `cause`.","triggerScenarios":"Passing a malformed connection string (missing scheme, stray characters, unencoded spaces/userinfo) in config.connectionString; strings like 'localhost:5432/db' without the postgres:// scheme; secrets with special characters breaking URL parsing.","commonSituations":"Copy-pasted connection strings missing the postgresql:// prefix; passwords containing '@' or '/' not percent-encoded; template strings producing 'undefined' segments.","solutions":["Use a full URL form: postgresql://user:password@host:5432/database","Percent-encode special characters in the password/username (encodeURIComponent)","Validate the string with `new URL(cs)` at startup/config load to fail fast with a clear message"],"exampleFix":"// before\n{ connectionString: 'localhost:5432/app' } // throws\n\n// after\n{ connectionString: 'postgresql://user:pass@localhost:5432/app' }","handlingStrategy":"validation","validationCode":"try { new URL(connectionString) } catch { throw new Error('connectionString must be a valid postgresql:// URL') }","typeGuard":"function isValidConnectionString(cs: string): boolean { try { new URL(cs); return true } catch { return false } }","tryCatchPattern":"catch (e) { if (e.cause instanceof TypeError) {/* malformed URL — fix the string */} throw e }","preventionTips":["Always include the postgresql:// scheme","encodeURIComponent passwords with special characters","Validate the URL at config load time"],"tags":["postgres","connection-string","url","config"],"backgroundTag":"invalid-connection-string","analyzedSha":"9696913134be3a4423513d2775f7b31d6917c049","analyzedAt":"2026-08-27T19:55:01.024Z","schemaVersion":2},"datasetVersion":"2026-08-28T00:17:15.603Z"}