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我从另一个计算器问题bash脚本让我所有的串行连接的设备:输出解析到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
我试图把它解析为对象的数组,以迭代和将它们显示在Rails视图中。输出是这样的:
{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'}
在这个Rails的控制台输出:
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"
,所以我试图解析它像这样在我的控制器:
def index
@devices = `./lib/scripts/get_serial.sh`.strip.gsub(" ","").split("\n")
end
,如果我做@devices[0]
的结果是:=> "{name:'/dev/input/event16',id_serial:'Logitech_USB_Receiver'}"
。
最后,在视图:
<ul>
<% @devices.each do |device| %>
<li><%= device %> </li>
<% end %>
</ul>
显示所有设备,但如果我这样做<%= device.name %>
我得到一个错误或<%= device['name'] %>
我得到了这个词“名”。
我的问题很简单。有没有更好的方法来做到这一点,并将:name
和:id_serial
作为典型变量(迭代数组并打印它们)?
不幸的是'设备[ '名']'在视图中显示为空/空白值。 – ftshtw
@ChrisV。为什么它应该呢?试试''device [:name]'' –
如果你不解释这一点,我会辞去工作,成为面包师或垃圾回收员。 – ftshtw