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Ruby on rails 检查Rails中是否存在参数_Ruby On Rails_Ruby On Rails 4 - Fatal编程技术网

Ruby on rails 检查Rails中是否存在参数

Ruby on rails 检查Rails中是否存在参数,ruby-on-rails,ruby-on-rails-4,Ruby On Rails,Ruby On Rails 4,我在检查参数是否存在时遇到问题。 我有: {}%>哎呀,愚蠢的错误,应该是 如果参数[:evm][:客户端id]。是否存在?

我在检查参数是否存在时遇到问题。 我有:


{}%>
哎呀,愚蠢的错误,应该是

如果参数[:evm][:客户端id]。是否存在?