Unable to send request with attachments

[steventranjs]

Description/Steps to reproduce

1. I have this template

{
        template: {
          method: 'POST',
          url: 'http://localhost/some-ftp-server',
          headers: {
            accepts: 'multipart/form-data',
            'content-type': 'multipart/form-data'
          },
          attachments: [{ field: 'file', path: '/tmp/file.json' }]
        },
        functions: {
          sendFileToserver: []
        }
}

2. Execute sendFileToserver will results in below error:

TypeError: Cannot read property 'form' of undefined
    at RequestBuilder.invoke (/Users/.../node_modules/loopback-connector-rest/lib/rest-builder.js:551:17)
    at Function.writeHdfsFile (/Users/.../node_modules/loopback-connector-rest/lib/rest-builder.js:439:17)

The issue is because variable r is NOT defined anywhere before line 551 in this file: https://github.com/strongloop/loopback-connector-rest/blob/master/lib/rest-builder.js (Line 551)

Expected result

• Should be able to send the attachment.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been closed due to continued inactivity. Thank you for your understanding. If you believe this to be in error, please contact one of the code owners, listed in the CODEOWNERS file at the top-level of this repository.

[mamartins]

Bumped into the same error. seems no one looked into it

[ketansp]

This issue should be re-opened