A utility to convert Objection database errors into Boom HTTP errors

Lead Maintainer: Daniel Cole

npm install @hapipal/avocat

See also the API Reference

Avocat is intended for use with hapi v19+, nodejs v12+, and Objection v2 or v3 (see v1 for lower support).

Avocat provides a single utility function Avocat.rethrow(error, [options]) which transforms database errors from Objection into Boom HTTP errors that are compatible with hapi.

'use strict';

const Hapi = require('@hapi/hapi');
const Avocat = require('@hapipal/avocat');
const User = require('./user-model'); // An Objection model bound to a knex instance

const server = Hapi.server();

server.route({
    method: 'get',
    path: '/users/{id}',
    handler(request) {

        try {
            return await User.query()
                .findById(request.params.id)
                .throwIfNotFound();
        }
        catch (err) {
            Avocat.rethrow(err); // Throws a 404 Not Found if user does not exist
            throw err;
        }
    }
});

The interface for Avocat is heavily inspired by Bounce.

A utility to convert Objection database errors into Boom HTTP errors

Note

Avocat is intended for use with hapi v19+, nodejs v12+, and Objection v2 or v3 (see v1 for lower support).

Throws a Boom error according to the Objection error received.

• error - the Objection error (any other types of errors are just ignored).
• options - optional object where:
  • return - if true will return the error instead of throwing it.
  • includeMessage - if true the Boom error created will preserve the Objection error message.

These are the error mappings maintained by Avocat:

• NotFoundError → 404 Not Found
• ValidationError → 400 Bad Request
• NotNullViolationError → 400 Bad Request
• ConstraintViolationError → 400 Bad Request
• ForeignKeyViolationError → 400 Bad Request
• DataError → 400 Bad Request
• CheckViolationError → 400 Bad Request
• UniqueViolationError → 409 Conflict
• DBError → 500 Internal Server Error

'use strict';

const Hapi = require('@hapi/hapi');
const Avocat = require('@hapipal/avocat');
const User = require('./user-model'); // An Objection model bound to a knex instance

const server = Hapi.server();

server.route({
    method: 'get',
    path: '/users/{id}',
    handler(request) {

        try {
            return await User.query()
                .findById(request.params.id)
                .throwIfNotFound();
        }
        catch (err) {
            Avocat.rethrow(err); // Throws a 404 Not Found if user does not exist
            throw err;
        }
    }
});