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POMVC3/T4 Custom Scaffolder Gives File Exists Error Even When File Doesn't Exist
 

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    <p>I have written a custom scaffolder for MVC3 using T4 templates to scaffold a delete stored procedure for a database and table passed to the scaffolder as parameters. When I run the scaffolder the output file is created in the correct place, but I get the following error:</p> <blockquote> <p>Invoke-ScaffoldTemplate : Unable to add 'UpdateCustomerCoupon.sql'. A file with that name already exists. At line:1 char:23 + param($c, $a) return . &lt;&lt;&lt;&lt; $c @a + CategoryInfo : NotSpecified: (:) [Invoke-ScaffoldTemplate], COMException + FullyQualifiedErrorId : T4Scaffolding.Cmdlets.InvokeScaffoldTemplateCmdlet</p> </blockquote> <p>It doesn't matter if the file exists at the output location or not. I get this error every time.</p> <p>Here is the PowerShell script for the scaffolder:</p> <pre><code>[T4Scaffolding.Scaffolder(Description = "Enter a description of DeleteSQL here")][CmdletBinding()] param( [parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true)][string]$DatabaseName, [parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true)][string]$TableName, [string]$Project, [string]$CodeLanguage, [string[]]$TemplateFolders, [switch]$Force = $true ) $outputPath = "Scripts/SQL/$TableName/Delete$TableName" Add-ProjectItemViaTemplate $outputPath -Template DeleteSQLTemplate ` -Model @{ TableName = $TableName; DatabaseName = $DatabaseName; Project = $Project } ` -SuccessMessage "Added DeleteSQL output at {0}" ` -TemplateFolders $TemplateFolders -Project $Project -CodeLanguage $CodeLanguage -Force:$Force Write-Host "Scaffolded DeleteSQL" </code></pre> <p>And here is the T4 Template code:</p> <pre><code>&lt;#@ Template Language="C#" HostSpecific="True" Inherits="DynamicTransform" Debug="True" #&gt; &lt;#@ Output Extension="sql" #&gt; &lt;#@ assembly name="System.Collections" #&gt; &lt;#@ assembly name="System.Configuration" #&gt; &lt;#@ assembly name="System.Data" #&gt; &lt;#@ assembly name="System.Web" #&gt; &lt;#@ import namespace="System.Collections.Generic" #&gt; &lt;#@ import namespace="System.Configuration" #&gt; &lt;#@ import namespace="System.Data" #&gt; &lt;#@ import namespace="System.Data.SqlClient" #&gt; &lt;#@ import namespace="System.Web" #&gt; USE [&lt;#= Model.DatabaseName #&gt;] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROCEDURE [dbo].[Delete&lt;#= Model.TableName #&gt;] ( @P&lt;#= Model.TableName #&gt;ID AS BIGINT, @PChangedByUserID BIGINT, @PChangedByURL VARCHAR(1024), @PChangedByIpAddress varchar(16) ) AS SET NOCOUNT ON BEGIN TRY BEGIN TRANSACTION -- update user history DECLARE @userHistoryID BIGINT = 0; DECLARE @details VARCHAR(4096) = '[&lt;#= Model.TableName #&gt;] ID ''' + CAST(@P&lt;#= Model.TableName #&gt;ID AS VARCHAR) + ''' was deleted.' EXEC InsertUserHistory @PChangedByUserID, @details, @PChangedByURL, @PChangedByIpAddress, @userHistoryID OUTPUT -- Rollback transaction if user history was not created IF(@userHistoryID = 0) BEGIN ROLLBACK SELECT CAST(-1 AS INT) RETURN END DELETE FROM [&lt;#= Model.TableName #&gt;] WHERE [ID] = @P&lt;#= Model.TableName #&gt;ID COMMIT SELECT CAST(1 AS INT) END TRY BEGIN CATCH ROLLBACK SELECT CAST(-2 AS INT) END CATCH RETURN </code></pre> <p>I invoke the scaffolder by typing "<strong>Scaffold DeleteSQL -DatabaseName $DatabaseName -TableName $TableName</strong>" into the Package Manager Console.</p> <p>I have also tried invoking the scaffolder with the -Force option like this: "<strong>Scaffold DeleteSQL -DatabaseName $DatabaseName -TableName $TableName -Force</strong>". I have also used "<strong>-Force true</strong>" and "<strong>-Force:true</strong>" with no luck. Also notice that the $Force parameter is set to true anyway, so I think it should overwrite by default, right?</p> <p>What do I need to do to get rid of this error?</p> <p>Thanks for the help.</p>
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