talk/graph/resolvers/action.js

const Action = {
  __resolveType({action_type}) {
    switch (action_type) {
    case 'DONTAGREE':
      return 'DontAgreeAction';
    case 'FLAG':
      return 'FlagAction';
    case 'LIKE':
      return 'LikeAction';
    }
  },

  // This will load the user for the specific action. We'll limit this to the
  // admin users only or the current logged in user.
  user({user_id}, _, {loaders: {Users}, user}) {
    if (user && (user.hasRole('ADMIN') || user_id === user.id)) {
      return Users.getByID.load(user_id);
    }
  }
};

module.exports = Action;