Question

我正在尝试删除数组中的对象。但是该数组嵌套在两个对象中。我该怎么做？

例如：让我们说要删除交易 _id：58c3154a19f82c0ddc53f0de

我该怎么做？

{
    "_id": {
        "$oid": "58bad6cf93ab9703da331e25"
    },
    "username": "david.lam@transfast.com",
    "password": "sha1$fc05ad7d$1$1cc86a287642516f947fda520ae8ddd42e983e23",
    "firstName": "David",
    "lastName": "David",
    "transactions": {
        "2017": {
            "3": [
                {
                    "where": "Duane Reade",
                    "what": "asdf",
                    "category": 6,
                    "amount": "34",
                    "_id": {
                        "$oid": "58c300ef1602f90c7166cbfb"
                    },
                    "date": {
                        "day": 10,
                        "month": 3,
                        "year": 2017
                    }
                },
                {
                    "where": "Amazon",
                    "what": "asdf",
                    "category": 2,
                    "amount": "100",
                    "_id": {
                        "$oid": "58c3154a19f82c0ddc53f0de"
                    },
                    "date": {
                        "day": 10,
                        "month": 3,
                        "year": 2017
                    }
                }
            ]
        }
    }
}

Answer 1

为此，您需要使用$pull运算符。使用点表示法对数组元素进行寻址。以下查询完成了这项工作：

@echo off
setlocal

:: Initialize unit translation
for /f "eol== delims==" %%V in ('set unit_ 2^>nul') do set "%%V="
for %%A in ("t=TB" "g=GB" "m=MB" "k=KB") do set "unit_%%~A"

> filecount.TXT (
  echo     DATE: %DATE%
  echo     TIME: %TIME%
  echo     USER: %USERNAME%
  echo COMPUTER: %COMPUTERNAME%
  echo(
  echo(
  echo(
  for /f "tokens=1" %%S in (servers.txt) do (
    echo   %%S  :::
    echo Counting %%S
    call :printSize "\\%%S\c$\folder1\folder2"
    echo(
    echo(
  )
)
exit /b

:printSize %1
setlocal
for /f "tokens=1,3,4" %%A in (
  'robocopy %1 %1 /l /is /nfl /ndl /njh'
) do (
  setlocal enableDelayedExpansion
  if %%A == Files (
      set "files=                %%B"
  ) else if %%A == Bytes (
    set "bytes=        %%B"
    set "unit=!unit_%%C!"
    if not defined unit set "unit=B"
  )
)
echo %files:~-16% File(s)  %bytes:~-8% %unit%
exit /b

mongodb：删除数组中的对象，嵌套在两个对象中

1 个答案: