ruby - 如何为多条路线编写相同的要求，例如发布，放置？ ( ruby 葡萄)

Question

如何避免重复代码？

resource 'api/publication/:publicationName' do

  params do
    requires :type, type: String, regexp: /^(static|dynamic)$/i
    requires :name, type: String, regexp: /^[a-z0-9_\s]+$/i
    requires :liveStartDate, type: String, regexp: dateRegexp
    optional :liveEndDate, type: String, regexp: dateRegexp
    requires :query, type: String
  end
  post '/dynamic' do
    authenticate!
    save_or_update(params)
  end

  params do
    requires :type, type: String, regexp: /^(static|dynamic)$/i
    requires :name, type: String, regexp: /^[a-z0-9_\s]+$/i
    requires :liveStartDate, type: String, regexp: dateRegexp
    optional :liveEndDate, type: String, regexp: dateRegexp
    requires :query, type: String
  end
  put '/dynamic/:id' do
    authenticate!
    save_or_update(params)
  end

end

Answer 1

在较新版本的 Grape 中，您可以创建可重用的命名参数组。例如:

resource 'api/publication/:publicationName' do
  helpers do
    params :common do
      requires :type,          type: String, regexp: /^(static|dynamic)$/i
      requires :name,          type: String, regexp: /^[a-z0-9_\s]+$/i
      requires :liveStartDate, type: String, regexp: dateRegexp
      optional :liveEndDate,   type: String, regexp: dateRegexp
      requires :query,         type: String
    end
  end

  params do
    use :common
  end
  post '/dynamic' do
    authenticate!
    save_or_update(params)
  end

  params do
    use :common
  end
  put '/dynamic/:id' do
    authenticate!
    save_or_update(params)
  end
end

这样做的一个好处是，您可以通过为不同的命名参数包含多个 use 语句来混合不同的参数组。