@H_502_1@我很接近……非常接近……我能够上传单个文件……但是当我将表单的file_field类型更改为：multiple =>是的,所以我可以一次上传多个图像,我的上传文件被包裹在一个数组中……’accepts_nested_attributes_for`的’魔力’丢失了.
编辑：
经过更多的检查,我想知道我是否需要打扰accepts_nested_attributes_for？也许我应该有一个file_field,：multiple =>在我的Gallery表单中是真的(而不是嵌套表单),然后在我的创建操作中创建新的库,然后循环遍历params [：gallery] [：photos_attributes] [“0”] [：image]数组中的每个元素可以这么说,为每个元素调用@ gallery.photos.create. ？！？看起来很麻烦……但我能想到的就是这些.
希望有更多Rails经验的人可以加入……
PARAMS：
{"utf8"=>"✓","authenticity_token"=>"9jXvIwcllct7UyUfo6cvhEucQf2u3SY50SuaCLtFO4c=","gallery"=>{
"name"=>"First Gallery","photos_attributes"=>{"0"=>{
"image"=>[
#<ActionDispatch::Http::UploadedFile:0x00000104b78978
@original_filename="first_test_image.jpg",@content_type="image/jpeg",@headers="Content-Disposition: form-data; name=\"gallery[photos_attributes][0][image][]\"; filename=\"first_test_image.jpg\"\r\nContent-Type: image/jpeg\r\n",@tempfile=#<File:/var/folders/bQ/bQYZC2ukFZCvbKzEDGRtJE+++TI/-Tmp-/RackMultipart20110622-4459-vz78ee>>,#<ActionDispatch::Http::UploadedFile:0x00000104b78950
@original_filename="second_test_image.jpg",@headers="Content-Disposition: form-data; name=\"gallery[photos_attributes][0][image][]\"; filename=\"second_test_image.jpg\"\r\nContent-Type: image/jpeg\r\n",@tempfile=#<File:/var/folders/bQ/bQYZC2ukFZCvbKzEDGRtJE+++TI/-Tmp-/RackMultipart20110622-4459-1jzhhyg>>
]
}
}
},"commit"=>"Save","action"=>"create","controller"=>"galleries"}
#app/models/gallery.rb
class Gallery < ActiveRecord::Base
has_many :photos,:dependent => :destroy
accepts_nested_attributes_for :photos
end
#app/models/photo.rb
class Photo < ActiveRecord::Base
belongs_to :gallery
mount_uploader :photo,PhotoUploader
end
#config/routes.rb
resources :galleries do
resources :photo,:only => [:create,:destroy]
end
GalleriesController
def new
@gallery = Gallery.new
@gallery.photos.build
respond_to do |format|
format.html # new.html.erb
format.json { render json: @gallery }
end
end
...
def create
@gallery = Gallery.new(params[:gallery])
respond_to do |format|
if @gallery.save
format.html { redirect_to @gallery,notice: 'Gallery was successfully created.' }
format.json { render json: @gallery,status: :created,location: @gallery }
else
format.html { render action: "new" }
format.json { render json: @gallery.errors,status: :unprocessable_entity }
end
end
end
解决方法
你可以为params数组做一点破解,比如：
aux = []
params[:gallery][:photos_attributes][:image].each do |f|
aux << {:image => f}
end
params[:post][:photos_attributes] = aux
@gallery = Gallery.new(params[:gallery])
我有类似的问题,我知道这是一个丑陋的黑客,但它对我有用.