Dropzone.js and form validation - ruby-on-rails

Question

Is it possible not to break the nice Rails form validation errors displayed after marking the whole form the 'dropzone' class?
Now, when I try to submit the form, nothing changes and the page stays at it was without providing any info for user which fields doesn't meet the requirements. Controller renders JSON response (dropzone using consequence) which seems to not be processed by the view.
Thank you in advance for your quick response.

Answer 1

My workaround for this problem:
Dropzone.options.filedrop = {
init: function () {
// Other triggers not listed
// ...
this.on("error", function (file, response) {
// Gets triggered when the files have successfully been sent.
// Redirect user or notify of success.
// Build an unordered list from the list of errors
var _ref, _results, _i, _len;
if ($.isPlainObject(response)) { // Check if response is in JSON format for showing standard form errors
// Remove errors from accepted image
file.previewElement.classList.remove("dz-error");
_ref = file.previewElement.querySelectorAll("[data-dz-errormessage]");
_results = [];
for (_i = 0, _len = _ref.length; _i < _len; _i++) {
node = _ref[_i];
_results.push(node.textContent = null);
}
file['status'] = 'success';
console.log("acceptedImage: " + JSON.stringify(file));
var json = response;
var errorText = "<div id=\"error_explanation\"><h2>" + Object.keys(json).length + " errors prohibited this thing from being saved:</h2><ul>";
$.each(json, function (key, value) {
errorText += "<li>" + key.capitalize() + ' ' + value[0] + "</li> ";
});
errorText += "</ul></div>";
console.log("errorText: " + errorText);
// Insert error list into form
$('.errors_placeholder').html(errorText);
} else {
if (myDropzone.files.length > 1) {
myDropzone.removeFile(myDropzone.files[0]);
}
}
});
}
};

Answer 2

You need to parse the JSON response into your js callback yourself, something like this:
Dropzone.options.filedrop = {
init: function () {
this.on("complete", function (file, jsonResponse) {
console.log(jsonResponse);
//do stuff with the jsonResponse here
});
}
};