如何将 Rails 变量传递给路由

Question

在我的显示页面中，我想根据变量的值更改“查看更多”按钮的路径。例如，如果我在显示页面上查看位于佛罗里达州坦帕市的一座建筑物并单击“查看更多”，我想返回到 locations_tampa_path 以再次查看坦帕市建筑物的完整列表。但是，我希望链接中的路径根据该特定建筑物的城市进行更改：

类似的东西：location_#{@location.city}_path

最好的方法是什么？
提前感谢您提供的任何帮助。

我的控制器：

class LocationsController < ApplicationController
  def index
    @locations = Location.all
  end
  def new
    @location = Location.new
  end
  def create
    @location = Location.new(location_params)
    if @location.save
      flash[:notice] = "New location added"
      redirect_to root_path
    else
      flash.now[:error] = 'Cannot send message'
      render 'new'
    end
  end
  def jacksonville
    @locations = Location.where(:city => "Jacksonville")
  end
  def stpetersburg
    @locations = Location.where(:city => "St. Petersburg")
  end
  def orlando
    @locations = Location.where(:city => "Orlando")
  end
  def tampa
    # @location = Location.find(params[:id])
    @locations = Location.where(:city => "Tampa")
    @photo = Photo.new
  end
  def show
    @location = Location.find(params[:id])
    @photo = Photo.new
  end

  private

  def location_params
    params.require(:location).permit(:name, :description, :address, :city, :featured)
  end
end

路线

get 'locations/tampa', to: 'locations#tampa'
get 'locations/jacksonville', to: 'locations#jacksonville'
get 'locations/orlando', to: 'locations#orlando'
get 'locations/st_petersburg', to: 'locations#stpetersburg'
resources :locations do
 resources :photos, only: :create
end

Answer 1

您在不需要的控制器中重复自己。看起来你想要一个参数化的路线：

在你的 routes.rb 中：

get "locations/:location", to: 'locations#show_location', as: :location_path

然后，您可以在视图/控制器中将location 作为参数传递：

location_path(location: @location.city)

您可以在LocationsController 中进行简单的show_location 操作：

def show_location
    @location = Location.find_by(city: params[:location])
    @photo = Photo.new

    if @location
       render @location.city
    end
end