使用Powershell中的shell --eval开关调用MongoDB更新时遇到问题 [英] Trouble invoking MongoDB update using shell --eval switch from Powershell
问题描述
我正在尝试使用mongo.exe --eval命令行开关调用MongoDB javascript片段.从Windows命令行运行时,此方法工作正常,但我想从Powershell脚本中调用它,如下所示:
I am trying to invoke a MongoDB javascript fragment using the mongo.exe --eval command line switch. This works fine when run from the Windows command line, but I want to invoke it from a Powershell script like so:
Invoke-Expression "& `"C:\MongoDB\bin\mongo.exe`" localhost:27017/mydb --eval `"db.mydata.update({}, {`$set : {v : 1}})`" --quiet"
mydata集合中只有一个文档,我想将其v
字段设置为1
.但是,从Powershell脚本运行时,上面的表达式返回SyntaxError: invalid property id (shell eval):1
,并且不会更新文档.
There is only one document in the mydata collection, and I want to set its v
field to 1
. But, the above expression returns SyntaxError: invalid property id (shell eval):1
when run from a Powershell script and does not update the document.
更令人困惑的是,以下操作按预期进行:
What makes this even more confusing is that the follow works as expected:
Invoke-Expression "& `"C:\MongoDB\bin\mongo.exe`" localhost:27017/mydb --eval `"printjson(db.mydata.findOne())`" --quiet"
有什么想法我可能做错了吗?
Any ideas what I might be doing wrong?
更新:
解决方案:
Invoke-Expression '& "C:\MongoDB\bin\mongo.exe" localhost:27017/mydb --eval "db.mydata.update({}, {`$set : {v : 2}})" --quiet'
推荐答案
尝试在eval语句周围使用单引号而不是双引号.
Try using single quotes instead of double quotes around the eval statement.
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