发表新帖
发表新帖

Where is the Rails method that converts data from `datetime_select` into a DateTime object?

前端 未结
关注
7 1797
醉酒成梦
醉酒成梦 2020-11-30 07:29

When I use <%= f.datetime_select :somedate %> in a form, it generates HTML like:
提交评论
  •  加载中...
  • 执笔经年
    2020-11-30 07:51

    Had to do something very similar, and ended up using this method:

    def time_value(hash, field)
  Time.zone.local(*(1..5).map { |i| hash["#{field}(#{i}i)"] })
end

time = time_value(params, 'start_time')

    See also: TimeZone.local

    0 讨论(0)
  • 梦毁少年i
    2020-11-30 07:54

    Someone else here offered solution of using DateTime.new, but that won't work in Postgresql. That will save the record as is, that is, as it was inserted in form, and thus it won't save in database as utc time, if you are using "timestamp without timezone". I spent hours trying to figure out this one, and the solution was to use Time.new rather than DateTime.new:

    datetime = Time.new(params["fuel_date(1i)"].to_i, params["fuel_date(2i)"].to_i, 
                        params["fuel_date(3i)"].to_i, params["fuel_date(4i)"].to_i,
                        params["fuel_date(5i)"].to_i)
    0 讨论(0)
  • 星月不相逢
    2020-11-30 07:57

    The start of that code path, seems to be right about here:

    https://github.com/rails/rails/blob/d90b4e2/activerecord/lib/active_record/base.rb#L1811

    That was tricky to find! I hope this helps you find what you need

    0 讨论(0)
  • 轻奢々
    2020-11-30 07:57

    I had this issue with Rails 4. It turned out I forgot to add the permitted params to my controller:

    def event_params
  params.require(:event).permit(....., :start_time, :end_time,...)
end
    0 讨论(0)
  • 情深已故
    2020-11-30 07:58

    Hi I have added the following on the ApplicationController, and it does this conversion.

        #extract a datetime object from params, useful for receiving datetime_select attributes
    #out of any activemodel
    def parse_datetime_params params, label, utc_or_local = :local
      begin
        year   = params[(label.to_s + '(1i)').to_sym].to_i
        month  = params[(label.to_s + '(2i)').to_sym].to_i
        mday   = params[(label.to_s + '(3i)').to_sym].to_i
        hour   = (params[(label.to_s + '(4i)').to_sym] || 0).to_i
        minute = (params[(label.to_s + '(5i)').to_sym] || 0).to_i
        second = (params[(label.to_s + '(6i)').to_sym] || 0).to_i

        return DateTime.civil_from_format(utc_or_local,year,month,mday,hour,minute,second)
      rescue => e
        return nil
      end
    end
    0 讨论(0)
    • 1 2 下一页
     看不清?
    提交回复
    热议问题