Drop constraint from Sequelize model

migration.js

// Remove constraint and index
queryInterface.sequelize.query(
  'ALTER TABLE "project" DROP CONSTRAINT IF EXISTS project_name_key;'
).then(function() {
  return queryInterface.removeIndex('project', 'project_name_key');
});

// Add unique constraint and index
queryInterface.addIndex('project', ['name'], {
  indexName: 'project_name_key',
  indicesType: 'UNIQUE'
});

This is awesome, solve my problem

queryInterface.removeConstraint() now exists! http://docs.sequelizejs.com/class/lib/query-interface.js~QueryInterface.html#instance-method-removeConstraint

queryInterface.removeConstraint() doesn't work for me. It throws error, can't find constraint with particular name, even though i have one

above raw query worked for me