Question

我想知道是否有办法将CSV标头转换为正式命名，如last_name到＆＃34;姓氏＆＃34;。

以下是我的控制器中的代码：

def cross_mri_transfer
  @reports = EmployeeEvent.where(event_type: "cross_mri_transfer")
  respond_to do |format|
    format.html
    format.csv { send_data @reports.cmt_to_csv, filename: "cross-mri-transfer-event-#{Date.today}.csv" }
  end
end

以下是模型中我方法中的代码：

def self.cmt_to_csv
  attributes = %w{
    employee_name
    location_assignment
    job_grade_position
    from_institution
    from_cluster
    from_region
    from_area
    from_unit
    to_institution
    to_cluster
    to_region
    to_area
    to_unit
    status
    initiated_by
    start_date
    approved_by
    applied_at
  }

CSV.generate(headers: true) do |csv|
  csv << attributes
  all.each do |employee_event|
    csv << [ 
      employee_event.employee.fullname_formal,
      employee_event.location_assignment,
      employee_event.job_grade_position,
      employee_event.event_data[:old][:institution_name],
      employee_event.event_data[:old][:cluster_name],
      employee_event.event_data[:old][:region_name],
      employee_event.event_data[:old][:area_name],
      employee_event.event_data[:old][:unit_name],
      employee_event.event_data[:new][:institution_name],
      employee_event.event_data[:new][:cluster_name],
      employee_event.event_data[:new][:region_name],
      employee_event.event_data[:new][:area_name],
      employee_event.event_data[:new][:unit_name],
      employee_event.status,
      employee_event.steps.where(step_type: :approve).first.performed_actor.fullname_formal.upcase,
      employee_event.start_date,
      employee_event.steps.where(step_type: :approve).last.performed_actor.fullname_formal.upcase,
      employee_event.applied_at 
    ]
  end
end

所以继续前进有没有办法用空格替换标题下划线并大写标题的第一个字符？

Answer 1

这应该很简单 - 添加行

attributes.map!(&:humanize)

如果您更喜欢结果，也可以使用:titleize。

:humanize分隔单词并将第一个单词的第一个字母大写; :titleize将单词和竖起每个单词的第一个字母分开。

这会将字符串转换为漂亮，可读的格式 - 文档：

https://apidock.com/rails/String/humanize

https://apidock.com/rails/ActiveSupport/Inflector/titleize

Answer 2

尝试 String#split 和 String#capitalize

> attributes.map{|e| e.split("_").map(&:capitalize).join(' ')}
#=> ["Employee Name", "Location Assignment", "Job Grade Position", "From Institution", "From Cluster", "From Region", "From Area", "From Unit", "To Institution", "To Cluster", "To Region", "To Area", "To Unit", "Status", "Initiated By", "Start Date", "Approved By", "Applied At"]

注意： String#humanize 会拆分单词，但第一个单词的首字母大写不是其他单词。例如：

> "employee_name".humanize
#=> "Employee name"

但是根据你的例子：你想要last_name到"Last Name"。

> "last_name".split("_").map(&:capitalize).join(' ')
#=> "Last Name"

如何在Ruby on Rails中打印CSV时将下划线转换为空格？

2 个答案: