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我從另一個計算器問題bash腳本讓我所有的串行連接的設備:輸出解析到Rails
#!/bin/bash
for sysdevpath in $(find /sys/bus/usb/devices/usb*/ -name dev); do
(
syspath="${sysdevpath%/dev}"
devname="$(udevadm info -q name -p $syspath)"
[[ "$devname" == "bus/"* ]] && continue
eval "$(udevadm info -q property --export -p $syspath)"
[[ -z "$ID_SERIAL" ]] && continue
echo "{name: '/dev/$devname', id_serial: '$ID_SERIAL'}"
)
done
我試圖把它解析爲對象的數組,以迭代和將它們顯示在Rails視圖中。輸出是這樣的:
{name: '/dev/input/event16', id_serial: 'Logitech_USB_Receiver'}
{name: '/dev/input/mouse2', id_serial: 'Logitech_USB_Receiver'}
{name: '/dev/hidraw0', id_serial: 'Logitech_USB_Receiver'}
{name: '/dev/usb/hiddev3', id_serial: 'Logitech_USB_Receiver'}
{name: '/dev/input/event17', id_serial: 'Logitech_USB_Receiver'}
{name: '/dev/hidraw1', id_serial: 'Logitech_USB_Receiver'}
{name: '/dev/input/event15', id_serial: 'SunplusIT_INC._Integrated_Camera'}
{name: '/dev/media0', id_serial: 'SunplusIT_INC._Integrated_Camera'}
{name: '/dev/video0', id_serial: 'SunplusIT_INC._Integrated_Camera'}
在這個Rails的控制檯輸出:
2.2.4 :001 > `./lib/scripts/get_serial.sh`
=> "{name: '/dev/input/event16', id_serial: 'Logitech_USB_Receiver'}\n{name: '/dev/input/mouse2', id_serial: 'Logitech_USB_Receiver'}\n{name: '/dev/hidraw0', id_serial: 'Logitech_USB_Receiver'}\n{name: '/dev/usb/hiddev3', id_serial: 'Logitech_USB_Receiver'}\n{name: '/dev/input/event17', id_serial: 'Logitech_USB_Receiver'}\n{name: '/dev/hidraw1', id_serial: 'Logitech_USB_Receiver'}{name: '/dev/media0', id_serial: 'SunplusIT_INC._Integrated_Camera'}\n{name: '/dev/video0', id_serial: 'SunplusIT_INC._Integrated_Camera'}\n"
,所以我試圖解析它像這樣在我的控制器:
def index
@devices = `./lib/scripts/get_serial.sh`.strip.gsub(" ","").split("\n")
end
,如果我做@devices[0]
的結果是:=> "{name:'/dev/input/event16',id_serial:'Logitech_USB_Receiver'}"
。
最後,在視圖:
<ul>
<% @devices.each do |device| %>
<li><%= device %> </li>
<% end %>
</ul>
顯示所有設備,但如果我這樣做<%= device.name %>
我得到一個錯誤或<%= device['name'] %>
我得到了這個詞「名」。
我的問題很簡單。有沒有更好的方法來做到這一點,並將:name
和:id_serial
作爲典型變量(迭代數組並打印它們)?
不幸的是'設備[ '名']'在視圖中顯示爲空/空白值。 – ftshtw
@ChrisV。爲什麼它應該呢?試試''device [:name]'' –
如果你不解釋這一點,我會辭去工作,成爲麪包師或垃圾回收員。 – ftshtw