sequelize/sequelize · error · Error

String based operators have been removed. Please use Symbol

Error message

String based operators have been removed. Please use Symbol operators, read more at https://sequelize.org/docs/v7/core-concepts/model-querying-basics/#deprecated-operator-aliases

What it means

String-based operator aliases (e.g. $gt, $like) and the operatorsAliases option were removed in Sequelize v7. Operators must be Symbol members of the Op object (Op.gt, Op.like, etc.).

Source

Thrown at packages/core/src/sequelize-typescript.ts:461

    }

    // @ts-expect-error -- sanity check
    if (options.pool === false) {
      throw new Error(
        'Setting the "pool" option to "false" is not supported since Sequelize 4. To disable the pool, set the "pool"."max" option to 1.',
      );
    }

    // @ts-expect-error -- sanity check
    if (options.logging === true) {
      throw new Error(
        'The "logging" option must be set to a function or false, not true. If you want to log all queries, set it to `console.log`.',
      );
    }

    // @ts-expect-error -- sanity check
    if (options.operatorsAliases) {
      throw new Error(
        'String based operators have been removed. Please use Symbol operators, read more at https://sequelize.org/docs/v7/core-concepts/model-querying-basics/#deprecated-operator-aliases',
      );
    }

    if ('dialectModulePath' in options) {
      throw new Error(
        'The "dialectModulePath" option has been removed, as it is not compatible with bundlers. Please refer to the documentation of your dialect at https://sequelize.org to learn about the alternative.',
      );
    }

    if ('dialectModule' in options) {
      throw new Error(
        'The "dialectModule" option has been replaced with an equivalent option specific to your dialect. Please refer to the documentation of your dialect at https://sequelize.org to learn about the alternative.',
      );
    }

    if ('typeValidation' in options) {
      throw new Error(

View on GitHub (pinned to 7e1deec499)

Solutions

1. Remove the operatorsAliases option entirely.
2. Replace string operators with Op.* symbols: { age: { [Op.gt]: 18 } }.

Example fix

// before
new Sequelize({ operatorsAliases: { $gt: Op.gt } });
User.findAll({ where: { age: { $gt: 18 } } });

// after
import { Op } from '@sequelize/core';
User.findAll({ where: { age: { [Op.gt]: 18 } } });

When it happens

Trigger: Passing the operatorsAliases option, or using string operators in where clauses like { age: { $gt: 18 } }.

Common situations: v5/v6 query code; tutorials using $-prefixed operators.

Related errors

• Accessing the connection manager is unlikely to be necessary
• Sequelize#modelManager was removed. Use Sequelize#models ins
• The Sequelize constructor no longer accepts multiple argumen
• The Sequelize constructor no longer accepts a string as the
• Support for `{ where: 'raw query' }` has been removed. Use `

AI-assisted analysis of sequelize/sequelize@7e1deec499 (2026-08-03). Data as JSON: /data/errors/d8256227170251f4.json. Report an issue: GitHub.