dropzone.js 失败时无法正确重定向或呈现错误

Question

dropzone.js一切正常，但照片上传失败时除外。

如果提交的表格附有太大的照片或提交的表格没有照片，则会发生以下情况：

在 Heroku 控制台中

Started POST "/photos" for ...Processing by PhotosController#create as HTML Completed 422 Unprocessable Entity ... method=POST path="/photos

然后浏览器显示示例。com/photos但是屏幕是空白的。

$(document).ready(function() {
  var dropzone;
  Dropzone.autoDiscover = false;
  dropzone = new Dropzone('#dropform', {
    maxFiles: 1,
    maxFilesize: 1,
    paramName: 'photo[picture]',
    headers: {
      "X-CSRF-Token": $('meta[name="csrf-token"]').attr('content')
    },
    addRemoveLinks: true,
    clickable: '#image-preview',
    previewsContainer: '#image-preview',
    thumbnailWidth: 200,
    thumbnailHeight: 200,
    parallelUploads: 100,
    autoProcessQueue: false,
    uploadMultiple: false
  });
  $('#item-submit').click(function(e) {
    e.preventDefault();
    e.stopPropagation();
    if (dropzone.getQueuedFiles().length > 0) {
      return dropzone.processQueue();
    } 
    else {
      return $('#dropform').submit();
    }

  });
  return dropzone.on('success', function(file, responseText) {
    return window.location.href = '/photos/' + responseText.id;
  });
  return dropzone.on('error', function(file, errorMessage, xhr) {
    console.log('error');
  });
});

PhotosController

def create
    @photo = current_user.photos.build(photo_params)
    respond_to do |format|
      if @photo.save!
        format.html { redirect_to @photo, notice: 'Photo was successfully created.' }
        format.json { render json: @photo } 
      else
        format.html { redirect_to new_photos_path, notice: 'Photo was not created'}
        format.json { redirect_to photos_path and return @photo.errors, status: :unprocessable_entity } 
      end
    end  
  end

编辑

return dropzone.on('error', function(file, errorMessage, xhr) {
  console.log('error');
  window.location.href = '/photos/new'
});

结果：

Started POST "/photos" Processing by PhotosController#create as HTML ...Completed 422 Unprocessable Entity in 422ms (ActiveRecord: 14.5ms) ...method=GET path="/photos/new"...method=POST path="/photos"

然后我们回到空白示例。com/photos

Answer 1

redirect_to new_photos_path

应该是 ->

redirect_to new_photo_path

dropzone.js 失败时无法正确重定向或呈现错误

dropzone.js not redirecting or rendering errors properly on failure

ruby-on-rails

dropzone.js