Question

我现在已经为此工作了大约6个小时......我一点也不知道出了什么问题。我有一个各种购物车，每个项目都有表格变量来更新他们的数量。无论出于何种原因，完全随机，ColdFusion将为表单更新插入两条记录。我甚至删除了更新，并在insert语句上方放置了一个“DELETE ALL WHERE”查询，以确保从数据库中清除所有内容，没有运气。这是我的代码（恢复到更新语句）：

<cfquery datasource="something" result="UpdateProdRecordBase">
Update dbo.CS
SET dbo.CS.Quantity = <cfqueryparam value="#form['base#ConfigurationList.The_Product_ID#group#CurrentProductReceiveGroup#']#" cfsqltype="cf_sql_numeric">
WHERE
dbo.CS.The_Product_ID = <cfqueryparam cfsqltype="cf_sql_numeric" value="#ConfigurationList.The_Product_ID#">
AND dbo.CS.The_TRequestSubSet_ID = <cfqueryparam cfsqltype="cf_sql_numeric" value="#TRSS#"> 
AND dbo.CS.ConfigType = 1 
AND dbo.CS.Group = <cfqueryparam value="#CurrentProductReceiveGroup#" cfsqltype="cf_sql_numeric"> 
AND dbo.CS.The_ParentProduct_ID = 0
</cfquery>


<cfif (isdefined("UpdateProdRecordBase.recordcount") AND UpdateProdRecordBase.recordcount EQ 0) OR (not isdefined("UpdateProdRecordBase.recordcount"))>

INSERT INTO dbo.CS(The_TRequestSubSet_ID, The_Product_ID, Quantity, ConfigType, Group)
VALUES (<cfqueryparam value="#TRSS#" cfsqltype="cf_sql_numeric">, 
<cfqueryparam cfsqltype="cf_sql_numeric" value="#ConfigurationList.The_Product_ID#">, 
<cfqueryparam value="#form  ['base#ConfigurationList.The_Product_ID#group#CurrentProductReceiveGroup#']#" cfsqltype="cf_sql_numeric">, 
 1,<cfqueryparam value="#CurrentProductReceiveGroup#" cfsqltype="cf_sql_numeric">)

同样，这些是背靠背查询... 99.9％的时间它完美运作。另外.1％的时间，它会复制条目。这没有逻辑上的一致性。我还删除了过去的更新脚本，并在插入查询上方添加了删除查询。同样的运气。

为了保持一致，我多次测试了相同的产品组合。您选择产品，一旦时间，完美的工作。再次选择相同的产品组合，插入重复。

有什么想法？此时我完全没有选择。我在这个过程中输出了查询，没有明显的项目使这种情况发生，数据完全相同。

Answer 1

我发现在我的所有插入之前添加if not exists可以防止因各种原因造成的所有重复（最常见的是用户将提交按钮混搭lol。试试这个：

 <cfquery>
    if not exists (select The_TRequestSubSet_ID 
        from  dbo.cs
        WHERE   The_TRequestSubSet_ID = <cfqueryparam value="#TRSS#" cfsqltype="cf_sql_numeric">
          AND   The_Product_ID = <cfqueryparam cfsqltype="cf_sql_numeric" value="#ConfigurationList.The_Product_ID#">
          AND   ConfigType = <cfqueryparam value="#form  ['base#ConfigurationList.The_Product_ID#group#CurrentProductReceiveGroup#']#" cfsqltype="cf_sql_numeric">
          AND   Group = <cfqueryparam value="#CurrentProductReceiveGroup#" cfsqltype="cf_sql_numeric">
                    )
    INSERT INTO dbo.CS(The_TRequestSubSet_ID , The_Product_ID, Quantity, ConfigType, Group)
    VALUES (<cfqueryparam value="#TRSS#" cfsqltype="cf_sql_numeric">, 
    <cfqueryparam cfsqltype="cf_sql_numeric" value="#ConfigurationList.The_Product_ID#">, 
    <cfqueryparam value="#form  ['base#ConfigurationList.The_Product_ID#group#CurrentProductReceiveGroup#']#" cfsqltype="cf_sql_numeric">, 
     1,<cfqueryparam value="#CurrentProductReceiveGroup#" cfsqltype="cf_sql_numeric">)
    </cfquery>

这告诉SQL只插入记录（如果它尚不存在）。如果你真的想让事情变得更容易：

<cfquery>
if not exists (select The_TRequestSubSet_ID 
                from  dbo.cs
                WHERE   The_TRequestSubSet_ID = <cfqueryparam value="#TRSS#" cfsqltype="cf_sql_numeric">
                  AND   The_Product_ID = <cfqueryparam cfsqltype="cf_sql_numeric" value="#ConfigurationList.The_Product_ID#">
                  AND   ConfigType = <cfqueryparam value="#form  ['base#ConfigurationList.The_Product_ID#group#CurrentProductReceiveGroup#']#" cfsqltype="cf_sql_numeric">
                  AND   Group = <cfqueryparam value="#CurrentProductReceiveGroup#" cfsqltype="cf_sql_numeric">
                )
    begin
        INSERT INTO dbo.CS(The_TRequestSubSet_ID, The_Product_ID, Quantity, ConfigType, Group)
        VALUES (<cfqueryparam value="#TRSS#" cfsqltype="cf_sql_numeric">, 
        <cfqueryparam cfsqltype="cf_sql_numeric" value="#ConfigurationList.The_Product_ID#">, 
        <cfqueryparam value="#form  ['base#ConfigurationList.The_Product_ID#group#CurrentProductReceiveGroup#']#" cfsqltype="cf_sql_numeric">, 
         1,<cfqueryparam value="#CurrentProductReceiveGroup#" cfsqltype="cf_sql_numeric">)
    end
else 
    begin
        Update dbo.CS
        SET dbo.CS.Quantity = <cfqueryparam value="#form['base#ConfigurationList.The_Product_ID#group#CurrentProductReceiveGroup#']#" cfsqltype="cf_sql_numeric">
        WHERE
        dbo.CS.The_Product_ID = <cfqueryparam cfsqltype="cf_sql_numeric" value="#ConfigurationList.The_Product_ID#">
        AND dbo.CS.The_TRequestSubSet_ID = <cfqueryparam cfsqltype="cf_sql_numeric" value="#TRSS#"> 
        AND dbo.CS.ConfigType = 1 
        AND dbo.CS.Group = <cfqueryparam value="#CurrentProductReceiveGroup#" cfsqltype="cf_sql_numeric"> 
        AND dbo.CS.The_ParentProduct_ID = 0
    End
</cfquery>

现在您有一个查询insert如果不存在，或者update如果

Answer 2

您的页面可能已经提交了两次，就像其他人已经说过http日志会确认这一点，但正确处理双重帖子仍然很重要。

我使用的策略是在会话中记录帖子，然后拒绝重复。

发送页面：

<form ...>
   <input type="hidden" name="magicnumber" value="#CreateUUID()#">
</form>

接收页面：

<cflock scope="session" type="exclusive">
  <cfif StructKeyExists(session.magicnumbers, form.magicnumber)>
    <cfset variables.isdup = true>
  <cfelse>
    <cfset session.magicnumbers[form.magicnumber] = true>
  </cfif>
</cflock>
<cfif !isdup>
...
</cfif>

然后我还会使用303标题重定向到另一个页面以显示任何内容。

当然，您必须提前创建session.magicnumbers，例如OnSessionStart（）如果您不使用用户会话，则可以使用应用程序或服务器范围，但计划以某种方式写入以删除旧值，这样您就不会非常慢慢地记忆。

表格提交时Coldfusion间歇性复制!!即使删除和更新

2 个答案: