保存Rails模型后重定向视图

在您的控制器中,可能有一个块,如:

def create
  @user = User.new(params[:place])

  respond_to do |format|
    if @user.save
      format.html { redirect_to(@user, :notice => 'User was successfully created.') }
      format.xml  { render :xml => @user, :status => :created, :location => @user }
    else
      format.html { render :action => "new" }
      format.xml  { render :xml => @user.errors, :status => :unprocessable_entity }
    end
  end
end

http://api.rubyonrails.org/classes/ActionController/Base.html 更多信息。

在create/update方法中可能有这样一个块:

    respond_to do |format|
      if @post.save
        format.html { redirect_to(@post, :notice => 'Post was successfully created.') }
        format.xml  { render :xml => @post, :status => :created, :location => @post }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @post.errors, :status => :unprocessable_entity }
      end
    end

redirect_to(root_path, :notice => 'Post was successfully created.')

在您的特定情况下,如果您设置了路线,则可以使用以下内容:

redirect_to(payment_page_path(@post), :notice => 'Post was successfully created.')

如果您从模型中调用save,您将不会被定向到任何地方,它只执行直接模型访问保存到数据库。您的重定向在控制器的创建和更新操作中进行了描述。您可以通过运行 rake routes 然后选择在保存模型实例时希望应用程序呈现的路径。您可能有一个名为payment\u path的路由,在您的控制器中可能是这样的

map.payment :controller => :payments_controller, :action => index

你会在你的创造行动中说

def create
  if @item.save(params[:item])
    redirect_to payment_path 
  else
    flash[:error] = "there was a problem"
    render :action => buy
  end
end

如果需要将参数(如用户id)传递给路由,则需要将其包含在路径参数中

redirect_to payment_path(@user) #=> automagically finds the id of active record models