我想将服务对象添加到我的 Controller 中。是否有机会将 flash 消息包含到该服务对象中?
user_stocks_controller
class UserStocksController < ApplicationController
def create
@user_stock = UserStocksCreator.new(current_user, params).call
redirect_to my_portfolio_path
end
end
服务对象user_stocks_creator
class UserStocksCreator
def initialize(current_user, params)
@current_user = current_user
@params = params[:stock_ticker]
end
def call
stock = Stock.find_by_ticker(params)
if stock.blank?
stock = Stock.new_from_lookup(params)
stock.save
end
@user_stock = UserStock.create(user: current_user, stock: stock)
flash[:success] = "Stock #{@user_stock.stock.name} was successfully added to portfolio"
end
private
attr_accessor :current_user, :params
end
使用这段代码我有一个错误:
undefined local variable or method `flash'
最佳答案
flash
方法仅在 Controller 中可用。当你想在服务对象中设置 flash 时,你需要将 flash 传递给服务对象。
# in the controller
def create
@user_stock = UserStocksCreator.new(current_user, params, flash).call
redirect_to my_portfolio_path
end
# in the service
class UserStocksCreator
def initialize(current_user, params, flash)
@current_user = current_user
@params = params[:stock_ticker]
@flash = flash
end
def call
# unchanged...
end
private
attr_accessor :current_user, :params, :flash
end
关于ruby-on-rails - 如何在 rails 服务对象中显示 flash 消息,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56137245/