Question

我是新來的rails，並試圖瞭解它如何在幾天內工作。我的目標是將瀏覽器（不同域）的JSON文件發佈到Rails應用程序，並將發送的數據保存到數據庫。

繼jQuery的代碼被執行：

$(document).ready(function() { 
    $("#testbutton").click(function() { 
    var params = '{"comment": "Test", "creator": "Max", "name": "Testname", "url": "www.foo.com"}'; 
    $.ajax({ 
     type: "post", 
     headers: { 'X-CSRF-Token': '<%= form_authenticity_token.to_s %>' }, 
     accepts: "application/json", 
     contents: "application/json", 
     data: params, 
     url: 'http://localhost:3000/pages' 
     }); 
    }); 
    }); 

我跳過驗證autheticity令牌在動作控制器：

skip_before_filter :verify_authenticity_token 

現在，我不知道是什麼在做創建行動我必須改變它將解析JSON並將其寫入數據庫。我使用創建動作的標準行爲：

def create 
    @page = Page.new(params[:data]) 

    respond_to do |format| 
     if @page.save 
     format.html { redirect_to @page, :notice => 'Page was successfully created.' } 
     format.json { render :json => @page, :status => :created, :location => @page } 
     else 
     format.html { render :action => "new" } 
     format.json { render :json => @page.errors, :status => :unprocessable_entity } 
     end 
    end 
    end 

服務器從網站接收數據，但無法解析它。

Started POST "/pages" for 127.0.0.1 at Thu Jun 07 21:48:53 +0200 2012 
Processing by PagesController#create as undefined 
    Parameters: {"{\"data\": {\"comment\": \"Test\", \"creator\": \"Fam Disselhoff\", \"name\": \"Renate\", \"url\": \"www.elesenroth.de\"}}"=>nil} 
    (0.1ms) begin transaction 
    SQL (67.5ms) INSERT INTO "pages" ("comment", "created_at", "creator", "name", "updated_at", "url") VALUES (?, ?, ?, ?, ?, ?) [["comment", nil], ["created_at", Thu, 07 Jun 2012 19:48:53 UTC +00:00], ["creator", nil], ["name", nil], ["updated_at", Thu, 07 Jun 2012 19:48:53 UTC +00:00], ["url", nil]] 

Answer 1

您可以使用以下解碼方法進行處理。

parsed_json = ActiveSupport::JSON.decode(params[:data]) 
new_obj = Whatever.new 
new_obj.field1 = parsed_json["field1"] 
new_obj.field2 = parsed_json["field2"] 
new_obj.save 

希望這會有所幫助。