我的数据库（MySQL）中有两辆车。第一个是红色（String color）法拉利（String brand），第二个是红色（String color）Lamborghini（String brand）。例如，当我只关注“ ferrari”这个品牌时，结果是所有品牌为“ ferrari”的汽车。好的，那是个好结果。但是问题是，当我在该字段中输入两个或多个参数时，例如：brand = ferrari和color = red。输入。结果是红色法拉利和红色兰博基尼，但应该只是红色法拉利，因为我键入了“ Ferrari”和“ Red”。如何返回正确的结果？这是我从CarRepository获得的方法。
List<Car> cars = carRepository.findByBrandOrModel(List<String> brands, List<String> models);
我不知道如何纠正此方法。只有我知道“ OR”是不正确的。谁能帮我？ This is my controller
答案 0 :(得分：0)
您可以像这样执行搜索。在您发布的图片中，我们看不到方法findByBrandOrModel
function Remove-FileSystemItem {
<#
.SYNOPSIS
Removes files or directories reliably and synchronously.
.DESCRIPTION
Removes files and directories, ensuring reliable and synchronous
behavior across all supported platforms.
The syntax is a subset of what Remove-Item supports; notably,
-Include / -Exclude and -Force are NOT supported; -Force is implied.
As with Remove-Item, passing -Recurse is required to avoid a prompt when
deleting a non-empty directory.
IMPORTANT:
* On Unix platforms, this function is merely a wrapper for Remove-Item,
where the latter works reliably and synchronously, but on Windows a
custom implementation must be used to ensure reliable and synchronous
behavior. See https://github.com/PowerShell/PowerShell/issues/8211
* On Windows:
* The *parent directory* of a directory being removed must be
*writable* for the synchronous custom implementation to work.
* The custom implementation is also applied when deleting
directories on *network drives*.
* If an indefinitely *locked* file or directory is encountered, removal is aborted.
By contrast, files opened with FILE_SHARE_DELETE /
[System.IO.FileShare]::Delete on Windows do NOT prevent removal,
though they do live on under a temporary name in the parent directory
until the last handle to them is closed.
* Hidden files and files with the read-only attribute:
* These are *quietly removed*; in other words: this function invariably
behaves like `Remove-Item -Force`.
* Note, however, that in order to target hidden files / directories
as *input*, you must specify them as a *literal* path, because they
won't be found via a wildcard expression.
* The reliable custom implementation on Windows comes at the cost of
decreased performance.
.EXAMPLE
Remove-FileSystemItem C:\tmp -Recurse
Synchronously removes directory C:\tmp and all its content.
#>
[CmdletBinding(SupportsShouldProcess, ConfirmImpact='Medium', DefaultParameterSetName='Path', PositionalBinding=$false)]
param(
[Parameter(ParameterSetName='Path', Mandatory, Position = 0, ValueFromPipeline, ValueFromPipelineByPropertyName)]
[string[]] $Path
,
[Parameter(ParameterSetName='Literalpath', ValueFromPipelineByPropertyName)]
[Alias('PSPath')]
[string[]] $LiteralPath
,
[switch] $Recurse
)
begin {
# !! Workaround for https://github.com/PowerShell/PowerShell/issues/1759
if ($ErrorActionPreference -eq [System.Management.Automation.ActionPreference]::Ignore) { $ErrorActionPreference = 'Ignore'}
$targetPath = ''
$yesToAll = $noToAll = $false
function trimTrailingPathSep([string] $itemPath) {
if ($itemPath[-1] -in '\', '/') {
# Trim the trailing separator, unless the path is a root path such as '/' or 'c:\'
if ($itemPath.Length -gt 1 -and $itemPath -notmatch '^[^:\\/]+:.$') {
$itemPath = $itemPath.Substring(0, $itemPath.Length - 1)
}
}
$itemPath
}
function getTempPathOnSameVolume([string] $itemPath, [string] $tempDir) {
if (-not $tempDir) { $tempDir = [IO.Path]::GetDirectoryName($itemPath) }
[IO.Path]::Combine($tempDir, [IO.Path]::GetRandomFileName())
}
function syncRemoveFile([string] $filePath, [string] $tempDir) {
# Clear the ReadOnly attribute, if present.
if (($attribs = [IO.File]::GetAttributes($filePath)) -band [System.IO.FileAttributes]::ReadOnly) {
[IO.File]::SetAttributes($filePath, $attribs -band -bnot [System.IO.FileAttributes]::ReadOnly)
}
$tempPath = getTempPathOnSameVolume $filePath $tempDir
[IO.File]::Move($filePath, $tempPath)
[IO.File]::Delete($tempPath)
}
function syncRemoveDir([string] $dirPath, [switch] $recursing) {
if (-not $recursing) { $dirPathParent = [IO.Path]::GetDirectoryName($dirPath) }
# Clear the ReadOnly attribute, if present.
# Note: [IO.File]::*Attributes() is also used for *directories*; [IO.Directory] doesn't have attribute-related methods.
if (($attribs = [IO.File]::GetAttributes($dirPath)) -band [System.IO.FileAttributes]::ReadOnly) {
[IO.File]::SetAttributes($dirPath, $attribs -band -bnot [System.IO.FileAttributes]::ReadOnly)
}
# Remove all children synchronously.
$isFirstChild = $true
foreach ($item in [IO.directory]::EnumerateFileSystemEntries($dirPath)) {
if (-not $recursing -and -not $Recurse -and $isFirstChild) { # If -Recurse wasn't specified, prompt for nonempty dirs.
$isFirstChild = $false
# Note: If -Confirm was also passed, this prompt is displayed *in addition*, after the standard $PSCmdlet.ShouldProcess() prompt.
# While Remove-Item also prompts twice in this scenario, it shows the has-children prompt *first*.
if (-not $PSCmdlet.ShouldContinue("The item at '$dirPath' has children and the -Recurse switch was not specified. If you continue, all children will be removed with the item. Are you sure you want to continue?", 'Confirm', ([ref] $yesToAll), ([ref] $noToAll))) { return }
}
$itemPath = [IO.Path]::Combine($dirPath, $item)
([ref] $targetPath).Value = $itemPath
if ([IO.Directory]::Exists($itemPath)) {
syncremoveDir $itemPath -recursing
} else {
syncremoveFile $itemPath $dirPathParent
}
}
# Finally, remove the directory itself synchronously.
([ref] $targetPath).Value = $dirPath
$tempPath = getTempPathOnSameVolume $dirPath $dirPathParent
[IO.Directory]::Move($dirPath, $tempPath)
[IO.Directory]::Delete($tempPath)
}
}
process {
$isLiteral = $PSCmdlet.ParameterSetName -eq 'LiteralPath'
if ($env:OS -ne 'Windows_NT') { # Unix: simply pass through to Remove-Item, which on Unix works reliably and synchronously
Remove-Item @PSBoundParameters
} else { # Windows: use synchronous custom implementation
foreach ($rawPath in ($Path, $LiteralPath)[$isLiteral]) {
# Resolve the paths to full, filesystem-native paths.
try {
# !! Convert-Path does find hidden items via *literal* paths, but not via *wildcards* - and it has no -Force switch (yet)
# !! See https://github.com/PowerShell/PowerShell/issues/6501
$resolvedPaths = if ($isLiteral) { Convert-Path -ErrorAction Stop -LiteralPath $rawPath } else { Convert-Path -ErrorAction Stop -path $rawPath}
} catch {
Write-Error $_ # relay error, but in the name of this function
continue
}
try {
$isDir = $false
foreach ($resolvedPath in $resolvedPaths) {
# -WhatIf and -Confirm support.
if (-not $PSCmdlet.ShouldProcess($resolvedPath)) { continue }
if ($isDir = [IO.Directory]::Exists($resolvedPath)) { # dir.
# !! A trailing '\' or '/' causes directory removal to fail ("in use"), so we trim it first.
syncRemoveDir (trimTrailingPathSep $resolvedPath)
} elseif ([IO.File]::Exists($resolvedPath)) { # file
syncRemoveFile $resolvedPath
} else {
Throw "Not a file-system path or no longer extant: $resolvedPath"
}
}
} catch {
if ($isDir) {
$exc = $_.Exception
if ($exc.InnerException) { $exc = $exc.InnerException }
if ($targetPath -eq $resolvedPath) {
Write-Error "Removal of directory '$resolvedPath' failed: $exc"
} else {
Write-Error "Removal of directory '$resolvedPath' failed, because its content could not be (fully) removed: $targetPath`: $exc"
}
} else {
Write-Error $_ # relay error, but in the name of this function
}
continue
}
}
}
}
}
答案 1 :(得分：0)
CarRepository
List<Car> findByBrandAndModel(String brands, String models);
在那之后，控制器应该具有
List<Car> cars = carRepository.findByBrandAndModel("red", "ferrari");
/ ----------------------------------- 还是更好的实施方式
CarRepository
Optional<List<Car>> findByBrandAndModel(String brands, String models);
在此之后，控制器应具有：
Optional<List<Car>> carsOptional = carRepository.findByBrandAndModel("red", "ferrari");
carOptional.ifPresent(e -> do stuff with the cars here);
这应该可以解决问题...