嵌套结构未正确排序

Question

我正在循环查询，构建结构数组

<cffunction name="QueryConvert" returntype="any" output="false">
    <cfargument name="q" type="query" required="yes">
    <cfargument name="page" type="numeric" required="no" default="1">
    <cfargument name="rows" type="numeric" required="no" default="500">
    <cfset var result = structnew()>
    <cfset var rowStruct = structnew()>
    <cfset var col = "">
    <cfset result["page"] = arguments.page>
    <cfset result["total"] = ceiling(arguments.q.TotalrecordCount/arguments.rows)>
    <cfset result["records"] = arguments.q.TotalrecordCount>
    <cfset result["rows"] = arraynew(1)>
    <cfset queryDeleteColumn(arguments.q,'TotalrecordCount')>
    <cfset queryDeleteColumn(arguments.q,'rowNum')>
    <cfset columnLabels = QueryColumnArray(arguments.q)>
    <cfset rowStruct = [:]><!--- Tada an ordered struct --->
    <cfloop array="#columnLabels#" item="col">
         <cfset rowStruct[col] = q["#col#"]>
    </cfloop>
    <cfdump var="#result#" abort>
    <cfreturn result />
</cffunction>

但是当我查看嵌套结构时，键的顺序全部混淆了。我希望它们与数据库中列名的顺序匹配 table。

Answer 1

简短的回答是您需要使用有序结构。长版本如下所示：

首先我们需要看一些样本数据

 <cfscript>
 q = queryNew("id,name,category","Integer,Varchar,Varchar", 
     [{id=1, name="One", category="Cat"},{id=2, name="Two", category="Dog"}]
 );


 writedump(q);
 </cfscript>

让我们看看示例数据。请注意，列与预期不同。

现在让我们准备好 columnLabels。请注意，我们正在创建一个数组。

 </cfscript>
 result.rows = [];

 columnLabels = q.getMeta().getColumnLabels();
 writedump(columnLabels);
 </cfscript>

<cfloop query="q">
   <cfset rowStruct = [:]><!--- Tada an ordered struct --->
   <cfloop array="#columnLabels#" item="col">
       <cfset rowStruct[col] = q["#col#"]>
   </cfloop>

   <cfset arrayappend(result.rows, rowStruct)>
</cfloop>

<cfdump var="#result.rows#">

多田

此外

使用 cfscript

更容易阅读

<cfscript>
for (row in q)  {
    rowStruct = [:];
    for (col in columnLabels)    {
        rowStruct[col] = q["#col#"];
    }
    result.rows.append(rowStruct);
}
</cfscript>

现场版见：CFFiddle.com

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