Public/Remove-Neo4jRelationship.ps1
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function Remove-Neo4jRelationship { <# .SYNOPSIS Remove Neo4j relationships .DESCRIPTION Remove Neo4j relationships 'Left' implies the node a relationship starts from, and 'Right' implies the node a relationship points to You can use either LeftLabel/LeftHash, or LeftQuery to determine the nodes on the left, ditto for nodes on the right You can't mix and match label/hash and query node selection between the left and right (yet) .EXAMPLE Remove-Neo4jRelationship -LeftQuery "MATCH (left:Server) WHERE left.ComputerName =~ 'dc.*'" ` -Type 'DependsOn' ` -Properties @{ ServiceHost = $True LoadBalanced = $True } # Remove relationships... # that start on a node labeled 'Server' where the 'ComputerName' starts with dc # that are of the type 'DependsOn' # That have specific relationship property values .PARAMETER LeftLabel Determines label of node(s) the relationships start from Use in conjunction with LeftHash, if needed Warning: susceptible to query injection .PARAMETER LeftHash Filter nodes the relationship starts from to only nodes containing these keys and values Warning: susceptible to query injection (keys only. values are parameterized) .PARAMETER LeftWhere When using LeftLabel, filter matching nodes with this. Use 'left' as the matched item Example: WHERE left.something = 'blah' Warning: susceptible to query injection .PARAMETER RightLabel Determines label of node(s) the relationships point to Use in conjunction with RightHash, if needed Warning: susceptible to query injection .PARAMETER RightHash Filter nodes the relationship points to to only nodes containing these keys and values Warning: susceptible to query injection (keys only. values are parameterized) .PARAMETER RightWhere When using RightLabel, filter matching nodes with this. Use 'right' as the matched item Example: WHERE right.something = 'blah' Warning: susceptible to query injection .PARAMETER LeftQuery Query to determine which node(s) the relationships start from IMPORTANT: This must assign the 'left' variable to the resulting nodes, for example: "MATCH (left:Service)" .PARAMETER RightQuery Query to determine which node(s) the relationships point to IMPORTANT: This must assign the 'right' variable to the resulting nodes, for example: "MATCH (right:Service)" .PARAMETER Type The relationship type (similar to a label) for the relationship we remove Warning: susceptible to query injection .PARAMETER Properties Filter relationships to delete to relationships with these properties Warning: susceptible to query injection (keys only. values are parameterized) .PARAMETER As Parse the Neo4j response as... Parsed: We attempt to parse the output into friendlier PowerShell objects Please open an issue if you see unexpected output with this Raw: We don't touch the response ($Response) Results: We expand the 'results' property on the response ($Response.results) Row: We expand the 'row' property on the responses results ($Response.results.data.row) We default to the value specified by Set-PSNeo4jConfiguration (Initially, 'Parsed') See ConvertFrom-Neo4jResponse for implementation details .PARAMETER MetaProperties Merge zero or any combination of these corresponding meta properties in the results: 'id', 'type', 'deleted' We default to the value specified by Set-PSNeo4jConfiguration (Initially, 'type') .PARAMETER MergePrefix If any MetaProperties are specified, we add this prefix to avoid clobbering existing neo4j properties We default to the value specified by Set-PSNeo4jConfiguration (Initially, 'Neo4j') .PARAMETER BaseUri BaseUri to build REST endpoint Uris from We default to the value specified by Set-PSNeo4jConfiguration (Initially, 'http://127.0.0.1:7474') .PARAMETER Credential PSCredential to use for auth We default to the value specified by Set-PSNeo4jConfiguration (Initially, not specified) .FUNCTIONALITY Neo4j #> [cmdletbinding(DefaultParameterSetName = 'LabelHash')] param( [parameter( ParameterSetName = 'LabelHash')] $LeftLabel, [parameter( ParameterSetName = 'LabelHash')] $LeftHash, [parameter( ParameterSetName = 'LabelHash')] $LeftWhere, [parameter( ParameterSetName = 'LabelHash')] $RightLabel, [parameter( ParameterSetName = 'LabelHash')] $RightHash, [parameter( ParameterSetName = 'LabelHash')] $RightWhere, [parameter( ParameterSetName = 'Query' )] $LeftQuery, [parameter( ParameterSetName = 'Query' )] $RightQuery, $Type, [hashtable]$Properties, [validateset('Raw', 'Results', 'Row', 'Parsed')] [string]$As = $PSNeo4jConfig.As, [validateset('id', 'type', 'deleted')] [string]$MetaProperties = $PSNeo4jConfig.MetaProperties, [string]$MergePrefix = $PSNeo4jConfig.MergePrefix, [string]$BaseUri = $PSNeo4jConfig.BaseUri, [System.Management.Automation.PSCredential] [System.Management.Automation.Credential()] $Credential = $PSNeo4jConfig.Credential ) $SQLParams = @{} $LeftVar = $null $RightVar = $null if($PSCmdlet.ParameterSetName -eq 'LabelHash') { $LeftQuery = $null if($LeftLabel) { $LeftPropString = $null if($LeftHash.keys.count -gt 0) { $Props = foreach($Property in $LeftHash.keys) { "$Property`: `$left$Property" $SQLParams.Add("left$Property", $LeftHash[$Property]) } $LeftPropString = $Props -join ', ' $LeftPropString = "{$LeftPropString}" } $LeftQuery = "MATCH (left:$LeftLabel $LeftPropString)" if($LeftWhere) { $LeftQuery = "$LeftQuery`n$LeftWhere" } } $RightQuery = $null if($RightLabel) { $RightPropString = $null if($RightHash.keys.count -gt 0 -and $RightLabel) { $Props = foreach($Property in $RightHash.keys) { "$Property`: `$right$Property" $SQLParams.Add("right$Property", $RightHash[$Property]) } $RightPropString = $Props -join ', ' $RightPropString = "{$RightPropString}" } $RightQuery = "MATCH (right:$RightLabel $RightPropString)" if($RightWhere) { $RightQuery = "$RightQuery`n$RightWhere" } } } $InvokeParams = @{} $PropString = $null if($Properties) { $Props = foreach($Property in $Properties.keys) { "$Property`: `$relationship$Property" $SQLParams.Add("relationship$Property", $Properties[$Property]) } $PropString = $Props -join ', ' $PropString = "{$PropString}" } if($SQLParams.Keys.count -gt 0) { $InvokeParams.add('Parameters', $SQLParams) } if($LeftQuery) {$LeftVar = 'left'} if($RightQuery) {$RightVar = 'right'} $Query = @" $LeftQuery $RightQuery MATCH ($LeftVar)-[relationship:$Type $PropString]->($RightVar) DELETE relationship "@ $Params = . Get-ParameterValues -BoundParameters $PSBoundParameters -Invocation $MyInvocation -Properties MetaProperties, MergePrefix, Credential, BaseUri, As Write-Verbose "$($Params | Format-List | Out-String)" Invoke-Neo4jQuery @Params @InvokeParams -Query $Query } |