Public/Get-ServiceNowRecord.ps1
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<# .SYNOPSIS Retrieves records for any and all tables .DESCRIPTION Retrieve records from any table with the option to filter, sort, choose fields, and more. Paging is supported with -First, -Skip, and -IncludeTotalCount. .PARAMETER Table Name of the table to be queried, by either table name or class name. Use tab completion for list of known tables. You can also provide any table name ad hoc. .PARAMETER Id Either the record sys_id or number. If providing just an Id, not with Table, the Id prefix will be looked up to find the table name. .PARAMETER ParentId The sys_id or number of the parent record. For example, to get catalog tasks for a requested item, provide the RITM number as ParentId and catalog task as the Table. .PARAMETER Description Filter results based on the 'description' field. The field will be different for each table. For many tables it will be short_description, but, for instance, the User table will be 'Name'. For unknown tables, the field will be 'short_description'. The comparison performed is a 'like'. .PARAMETER Property Return one or more specific fields otherwise all fields will be returned .PARAMETER Filter Array or multidimensional array of fields and values to filter on. Each array should be of the format @(field, comparison operator, value) separated by a join, either 'and', 'or', or 'group'. For a complete list of comparison operators, see $script:ServiceNowOperator and use Name in your filter. See the examples. .PARAMETER Sort Array or multidimensional array of fields to sort on. Each array should be of the format @(field, asc/desc). .PARAMETER DisplayValue Option to display values for reference fields. 'false' will only retrieve the reference 'true' will only retrieve the underlying value 'all' will retrieve both. This is helpful when trying to translate values for a query. .PARAMETER IncludeCustomVariable Include custom variables in the return object. Some records may have associated custom variables, some may not. For instance, an RITM may have custom variables, but the associated tasks may not. A property named 'CustomVariable' will be added to the return object. .PARAMETER AsValue Return the underlying value instead of pscustomobject. Only valid when the Property parameter is set to 1 item. Helpful when retrieving sys_id for example. .PARAMETER Connection Azure Automation Connection object containing username, password, and URL for the ServiceNow instance .PARAMETER ServiceNowSession ServiceNow session created by New-ServiceNowSession. Will default to script-level variable $ServiceNowSession. .EXAMPLE Get-ServiceNowRecord RITM0010001 Get a specific record by number .EXAMPLE Get-ServiceNowRecord -Id RITM0010001 -Property 'short_description','sys_id' Get specific properties for a record .EXAMPLE Get-ServiceNowRecord -Table 'Catalog Task' -ParentId 'RITM0010001' Get tasks for the parent requested item .EXAMPLE Get-ServiceNowRecord -Table incident -Filter @('state', '-eq', '1') -Description 'powershell' Get incident records where state equals New or short description contains the word powershell .EXAMPLE Get-ServiceNowRecord -Table incident -Filter @('assigned_to.name', '-like', 'greg') Get incident records where the assigned to user's name contains greg .EXAMPLE $filter = @('state', '-eq', '1'), '-and', @('short_description','-like', 'powershell'), '-group', @('state', '-eq', '2') PS > Get-ServiceNowRecord -Table incident -Filter $filter Get incident records where state is New and short description contains the word powershell or state is In Progress. The first 2 filters are combined and then or'd against the last. .EXAMPLE Get-ServiceNowRecord -Table 'Incident' -Filter @('opened_at', '-between', (Get-Date).AddMonths(-24), (get-date).AddMonths(-12)) -IncludeTotalCount Get all incident records that were opened between 1 and 2 years ago .EXAMPLE Get-ServiceNowRecord -Table incident -Filter @('state', '-eq', '1') -Sort @('opened_at', 'desc'), @('state') Get incident records where state equals New and first sort by the field opened_at descending and then sort by the field state ascending ] .EXAMPLE Get-ServiceNowRecord -Table 'change request' -Filter @('opened_at', '-ge', 'javascript:gs.daysAgoEnd(30)') Get change requests opened in the last 30 days. Use class name as opposed to table name. .EXAMPLE Get-ServiceNowRecord -Table 'change request' -First 100 -IncludeTotalCount Get all change requests, paging 100 at a time. .EXAMPLE Get-ServiceNowRecord -Table 'change request' -IncludeCustomVariable -First 5 Get the first 5 change requests and retrieve custom variable info .EXAMPLE Get-ServiceNowRecord -Table 'cmdb_ci' -Property sys_id -First 1 -AsValue Get the underlying value for a property instead of a pscustomobject where the value needs to be extracted .EXAMPLE gsnr RITM0010001 Get a specific record by number using the function alias .INPUTS ID .OUTPUTS PSCustomObject. If -AsValue is used, the type will be the selected field. .LINK https://docs.servicenow.com/bundle/quebec-platform-user-interface/page/use/common-ui-elements/reference/r_OpAvailableFiltersQueries.html .LINK https://developer.servicenow.com/dev.do#!/reference/api/sandiego/rest/c_TableAPI#table-GET #> function Get-ServiceNowRecord { [OutputType([System.Management.Automation.PSCustomObject])] [CmdletBinding(DefaultParameterSetName = 'Id', SupportsPaging)] [Alias('gsnr')] Param ( [Parameter(ParameterSetName = 'Table', Mandatory)] [Alias('sys_class_name')] [string] $Table, [Parameter(ParameterSetName = 'Id', Mandatory, ValueFromPipeline, ValueFromPipelineByPropertyName, Position = 0)] [Parameter(ParameterSetName = 'Table', ValueFromPipeline, ValueFromPipelineByPropertyName)] [ValidateScript( { if ($_ -match '^[a-zA-Z0-9]{32}$' -or $_ -match '^([a-zA-Z]+)[0-9]+$') { $true } else { throw 'Id must be either a 32 character alphanumeric, ServiceNow sysid, or prefix/id, ServiceNow number.' } })] [Alias('sys_id', 'number')] [string] $ID, [Parameter()] [ValidateScript( { if ($_ -match '^[a-zA-Z0-9]{32}$' -or $_ -match '^([a-zA-Z]+)[0-9]+$') { $true } else { throw 'ParentId must be either a 32 character alphanumeric, ServiceNow sysid, or prefix/id, ServiceNow number.' } })] [string] $ParentID, [Parameter()] [string] $Description, [Parameter()] [Alias('Fields', 'Properties')] [string[]] $Property, [Parameter()] [System.Collections.ArrayList] $Filter, [parameter()] [ValidateNotNullOrEmpty()] [System.Collections.ArrayList] $Sort, [Parameter()] [ValidateSet('true', 'false', 'all')] [Alias('DisplayValues')] [string] $DisplayValue = 'true', [Parameter()] [switch] $IncludeCustomVariable, [Parameter()] [switch] $AsValue, [Parameter()] [hashtable] $Connection, [Parameter()] [hashtable] $ServiceNowSession = $script:ServiceNowSession ) begin { $invokeParams = @{ Filter = $Filter Property = $Property Sort = $Sort DisplayValue = $DisplayValue First = $PSCmdlet.PagingParameters.First Skip = $PSCmdlet.PagingParameters.Skip IncludeTotalCount = $PSCmdlet.PagingParameters.IncludeTotalCount Connection = $Connection ServiceNowSession = $ServiceNowSession } if ( $Table ) { $thisTable = $script:ServiceNowTable | Where-Object { $_.Name.ToLower() -eq $Table.ToLower() -or $_.ClassName.ToLower() -eq $Table.ToLower() } if ( -not $thisTable ) { # we aren't aware of this table, create default config $thisTable = @{ Name = $Table ClassName = $null Type = $null NumberPrefix = $null DescriptionField = $null } } } } process { if ( $ID ) { if ( $ID -match '^[a-zA-Z0-9]{32}$' ) { if ( -not $thisTable ) { throw 'Providing sys_id for -Id requires a value for -Table. Alternatively, provide an Id with a prefix, eg. INC1234567, and the table will be automatically determined.' } $idFilter = @('sys_id', '-eq', $ID) } else { if ( -not $thisTable ) { # get table name from prefix if only Id was provided $idPrefix = ($ID | Select-String -Pattern '^([a-zA-Z]+)([0-9]+$)').Matches.Groups[1].Value.ToLower() Write-Debug "Id prefix is $idPrefix" $thisTable = $script:ServiceNowTable | Where-Object { $_.NumberPrefix -and $idPrefix -eq $_.NumberPrefix } if ( -not $thisTable ) { throw ('The prefix for Id ''{0}'' was not found and the appropriate table cannot be determined. Known prefixes are {1}. Please provide a value for -Table.' -f $ID, ($ServiceNowTable.NumberPrefix.Where( { $_ }) -join ', ')) } } $idFilter = @('number', '-eq', $ID) } if ( $invokeParams.Filter ) { $invokeParams.Filter = $invokeParams.Filter, 'and', $idFilter } else { $invokeParams.Filter = $idFilter } } # we have the table, update the params $invokeParams.Table = $thisTable.Name if ( $ParentID ) { if ( $ParentID -match '^[a-zA-Z0-9]{32}$' ) { $parentIdFilter = @('parent.sys_id', '-eq', $ParentID) } else { $parentIdFilter = @('parent.number', '-eq', $ParentID) } if ( $invokeParams.Filter ) { $invokeParams.Filter = $invokeParams.Filter, 'and', $parentIdFilter } else { $invokeParams.Filter = $parentIdFilter } } if ( $Description ) { # determine the field we should compare for 'description' and add the filter if ( -not $thisTable.DescriptionField ) { Write-Warning ('We do not have table ''{0}'' in the config; short_description will be used as the description field' -f $thisTable.Name) $thisTable.DescriptionField = 'short_description' } if ( $invokeParams.Filter ) { $invokeParams.Filter = $invokeParams.Filter, 'and', @($thisTable.DescriptionField, '-like', $Description) } else { $invokeParams.Filter = @($thisTable.DescriptionField, '-like', $Description) } } $addedSysIdProp = $false # we need the sys_id value in order to get custom var data # add it in if specific properties were requested and not part of the list if ( $IncludeCustomVariable ) { if ( $Property -and 'sys_id' -notin $Property ) { $invokeParams.Property += 'sys_id' $addedSysIdProp = $true } } # should use Get-ServiceNowAttachment, but put this here for ease of access if ( $thisTable.Name -eq 'attachment' ) { Write-Warning 'For attachments, use Get-ServiceNowAttachment' $invokeParams.Remove('Table') | Out-Null $invokeParams.UriLeaf = '/attachment' } $result = Invoke-ServiceNowRestMethod @invokeParams if ( $IncludeCustomVariable ) { # suppress warning when getting total count $existingWarning = $WarningPreference $WarningPreference = 'SilentlyContinue' # for each record, get the variable names and then get the variable values foreach ($record in $result) { $customVarParams = @{ Table = 'sc_item_option_mtom' Filter = @('request_item', '-eq', $record.sys_id), 'and', @('sc_item_option.item_option_new.type', '-in', '1,2,3,4,5,6,7,8,9,10,16,18,21,22,26') Property = 'sc_item_option.item_option_new.name', 'sc_item_option.value', 'sc_item_option.item_option_new.type', 'sc_item_option.item_option_new.question_text' IncludeTotalCount = $true } $customVarsOut = Get-ServiceNowRecord @customVarParams $record | Add-Member @{ 'CustomVariable' = $customVarsOut | Select-Object -Property ` @{ 'n' = 'Name' 'e' = { $_.'sc_item_option.item_option_new.name' } }, @{ 'n' = 'Value' 'e' = { $_.'sc_item_option.value' } }, @{ 'n' = 'DisplayName' 'e' = { $_.'sc_item_option.item_option_new.question_text' } }, @{ 'n' = 'Type' 'e' = { $_.'sc_item_option.item_option_new.type' } } } if ( $addedSysIdProp ) { $record | Select-Object -Property * -ExcludeProperty sys_id } else { $record } } $WarningPreference = $existingWarning } else { # format the results if ( $Property ) { if ( $Property.Count -eq 1 -and $AsValue ) { $propName = $result | Get-Member | Where-Object { $_.MemberType -eq 'NoteProperty' } | Select-Object -exp Name $result | Select-Object -ExpandProperty $propName } else { $result } } else { if ($thisTable.Type) { $result | ForEach-Object { $_.PSObject.TypeNames.Insert(0, $thisTable.Type) } } $result } } } } |