422 Unprocessable Entity on push

[Dermah]

I'm getting a 422 Unprocessable Entity error from node-git-lfs when trying to push to the server using git-lfs/2.11.0.

I dug in to it and it looks like the error is thrown when validating the batch request here:

node-git-lfs/lib/routes/batch.js

Lines 100 to 110 in ebbe7d8

	app.post('/:user/:repo/objects/batch', wrap(function* (req, res, next) {
	// validate request body according to JSON Schema
	try {
	var body = yield parse.json(req);
	req.jsonBody = body;
	var valid = validate(body, BATCH_REQUEST_SCHEMA).valid;
	if (!valid) {
	let err = new Error();
	err.status = 422;
	next(err);
	} else {

My git-lfs client sends through a body that looks like this

{ operation: 'upload',
  objects:
   [ { oid:
        '19f2dcd3b4f260b2d6e5cdec56c58d2b150526b262cb0ca15b8d86eb6398d3dd',
       size: 386583 } ],
  transfers: [ 'lfs-standalone-file', 'basic' ],
  ref: { name: 'refs/heads/master' } }

I think the transfers and ref keys are failed by the JSON schema validation. Removing this line from the schema makes everything work smoothly:

node-git-lfs/schema/http-v1-batch-request-schema.json

Line 27 in ebbe7d8

"additionalProperties": false

[Dermah]

Ah yeah the actual schema published in git-lfs is slightly different to the one that exists in this repo