import {createContext, EXPECTED_OPTIONS_KEY} from 'dataloader-sequelize';
/* Per request */
const context = createContext(sequelize); // must not be called before all models and associations are defined
await User.findById(2, {[EXPECTED_OPTIONS_KEY]: context});
await User.findById(2, {[EXPECTED_OPTIONS_KEY]: context}); // Cached or batched, depending on timing

import {createContext, EXPECTED_OPTIONS_KEY} from 'dataloader-sequelize';
const context = createContext(sequelize);
const results = await User.findAll({where: {/* super complicated */}});
context.prime(results);
await User.findById(2, {[EXPECTED_OPTIONS_KEY]: context}); // Cached, if was in results