我已經爲使用T4模板的MVC3編寫了一個自定義腳手架來爲作爲參數傳遞給腳手架的數據庫和表進行腳手架刪除存儲過程。當我運行的輸出文件在正確的位置創建的棚架,但我得到了以下錯誤:MVC3/T4自定義腳手架即使文件不存在也會導致文件存在錯誤
Invoke-ScaffoldTemplate : Unable to add 'UpdateCustomerCoupon.sql'. A file with that name already exists. At line:1 char:23 + param($c, $a) return . <<<< $c @a + CategoryInfo : NotSpecified: (:) [Invoke-ScaffoldTemplate], COMException + FullyQualifiedErrorId : T4Scaffolding.Cmdlets.InvokeScaffoldTemplateCmdlet
如果文件存在於輸出位置,或者不沒關係。我每次都會遇到這個錯誤。
下面是棚架PowerShell腳本:
[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"
這裏是T4模板代碼:
<#@ Template Language="C#" HostSpecific="True" Inherits="DynamicTransform" Debug="True" #>
<#@ Output Extension="sql" #>
<#@ assembly name="System.Collections" #>
<#@ assembly name="System.Configuration" #>
<#@ assembly name="System.Data" #>
<#@ assembly name="System.Web" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Configuration" #>
<#@ import namespace="System.Data" #>
<#@ import namespace="System.Data.SqlClient" #>
<#@ import namespace="System.Web" #>
USE [<#= Model.DatabaseName #>]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[Delete<#= Model.TableName #>] (
@P<#= Model.TableName #>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) = '[<#= Model.TableName #>] ID ''' + CAST(@P<#= Model.TableName #>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
[<#= Model.TableName #>]
WHERE
[ID] = @P<#= Model.TableName #>ID
COMMIT
SELECT CAST(1 AS INT)
END TRY
BEGIN CATCH
ROLLBACK
SELECT CAST(-2 AS INT)
END CATCH
RETURN
我通過鍵入「腳手架DeleteSQL -databasename $數據庫名調用棚架 - TableName $ TableName「放入程序包管理器控制檯。
我自己也嘗試通過這樣的-Force選項調用棚架:「腳手架DeleteSQL -databasename $數據庫名-TableName $表名-Force」。我也用「-真力」和「-力:真」沒有運氣。還要注意$ Force參數設置爲true,所以我認爲它應該默認覆蓋,對吧?
我需要做些什麼來擺脫這個錯誤?
感謝您的幫助。