Ruby on rails 如何通过ajax将BLOBURL传递给rails创建方法

我想在Rails项目中上传声音。 下载录音效果很好，但我无法将数据发送到rails服务器

recorder && recorder.exportWAV(function (blob) {
        var url = URL.createObjectURL(blob);
        console.log(url);

        $.ajax({
            type: "POST",
            url: "/voices",
            data: {voice: {sound: url}}
        });
    });

服务器日志中有post数据，但未创建

声音

Started POST "/voices" for ::1 at 2015-12-08 20:43:16 +0900
Processing by VoicesController#create as */*
  Parameters: {"voice"=>{"sound"=>"blob:http%3A//localhost%3A3000/3ad3859e-b960-44b8-ba18-20727e739bab"}}
  User Load (0.4ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1  ORDER BY "users"."id" ASC LIMIT 1  [["id", 1]]
  Profile Load (0.3ms)  SELECT  "profiles".* FROM "profiles" WHERE "profiles"."user_id" = $1 LIMIT 1  [["user_id", 1]]
   (0.2ms)  BEGIN
  SQL (0.5ms)  INSERT INTO "voices" ("sound", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id"  [["sound", nil], ["created_at", "2015-12-08 11:43:16.254713"], ["updated_at", "2015-12-08 11:43:16.254713"]]
   (0.6ms)  COMMIT
Completed 500 Internal Server Error in 135ms (ActiveRecord: 3.4ms)

如何将声音blob数据传递到rails服务器

语音控制器.rb

---

如果您试图正确发布数据或正确设置模型，则此代码会导致错误

未捕获类型错误：非法调用
不确定。您需要使用file.open（filename，w）将音频另存为文件

SQL表明，没有任何东西被传递到“声场”

如果要将其作为blob传递，则需要相应地设置列（如果不完全设置，则更好的选项是2）
将音频数据发送并保存为文件。看看


您的控制器代码不可用，查看日志我猜在保存模型时，您没有传递要保存的声音。
在135ms（ActiveRecord:3.4ms）内完成了500个内部服务器错误。
您可以附加错误消息吗？我添加了控制器。我是否保存错误？@richfisher这是因为我忘记添加相应的视图模板，还有
500个内部服务器错误
。很抱歉，我没有写足够的信息。我在用载波处理文件。我仍然不知道如何处理二进制文件。如果你能帮助我，我非常感谢。看一下更新的答案，你正在发送一个blob url，它只存在于你的浏览器中，更好的方法应该是将实际的blob数据发送到你的rails应用程序。我更改了行，然后我得到了
未捕获类型错误：非法调用
错误。我被卡住了..我想，这是jQuery在处理blob数据时错误地设置头的错误，你能看一下和吗。您可能需要将
processData:false
添加到ajax调用中。最后！我只需要添加
processData:false
和
contentType:false
，就像你给我看的帖子一样。谢谢
class VoicesController < ApplicationController
    @voice = Voice.new(voice_params)

    respond_to do |format|
      if @voice.save
        format.html { redirect_to root_path, notice: 'voice was successfully created.' }
        format.json { render :show, status: :created, location: root_path }
      else
        format.html { render :new }
        format.json { render json: @voice.errors, status: :unprocessable_entity }
      end
    end

  def voice_params
    params.require(:voice).permit(:sound, :user_id)
  end
end

class Voice < ActiveRecord::Base
  belongs_to :phrase
  belongs_to :user
  mount_uploader :sound, SoundUploader
end

recorder && recorder.exportWAV(function (blob) {
    var url = URL.createObjectURL(blob);
    console.log(url);

    var formData = new FormData();
    formData.append('voice[sound]', url);

    $.ajax({
        type: "POST",
        url: "/voices",
        data: formData
    });
});

    SQL (0.5ms)  INSERT INTO "voices" ("sound", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id"  [["sound", nil], ["created_at", "2015-12-08 11:43:16.254713"], ["updated_at", "2015-12-08 11:43:16.254713"]]

formData.append('voice[sound]', url); # Comment this
formData.append('voice[sound]', blob); # This will send the actual data to your server and not the blob url. then your carrierwave will have the file data, which it can save.