使用数组中存储的 php 值的总和更新 MySQL table 列

Question

我有一个 html 表单供用户输入数据，该表单将值保存在两个 MySQL table 中，发票和订单项。单击 "save" 按钮时，这些值将作为新行插入到发票和订单项中。页面刷新以显示相同的表单，但用户输入的值保存在输入字段中。该网页有多个 'lineitems' 用户可以创建。此数据被保存到行项目 table。每个发票行都有一个唯一的 ID，该 ID 会添加到用户创建的每个订单项中。这样发票就可以从行项目 table 中获取与其关联的每个行项目。我需要对每张发票的 lineitems.quantity 执行求和计算，并将值保存到 invoices.totalquantity。

我曾尝试在行项目 table 本身上设置触发器，但总是失败。我现在正试图从程序方面来做。

我的代码：

// LINE ITEMS CLASS 
  // ==============================================================================================
class lineitems{

    var $queryresult = NULL;

    function lineitems($db, $invoiceid, $invoicetype = "Order"){

        $this->db = $db;
        $this->invoiceid = ((int) $invoiceid);
        $this->invoicetype = $invoicetype;

    }//end method


    function get(){

    $querystatement = "
            SELECT
                products.partname,
                products.partnumber,
                products.claveid,
                products.claveid2,
                products.layupid,

                lineitems.id,
                lineitems.productid,

                lineitems.quantity,




                lineitems.nipple,
                lineitems.polish,
                lineitems.edgeseal,
                lineitems.leads,

                lineitems.leadsl,

                lineitems.width,
                lineitems.widthf,
                lineitems.height,
                lineitems.heightf,
                lineitems.comment



            FROM
                lineitems LEFT JOIN products ON lineitems.productid = products.id
            WHERE
                invoiceid = ".$this->invoiceid." 
            ORDER BY
                lineitems.displayorder";



            /*  
            FROM
                lineitems LEFT JOIN products ON lineitems.productid = products.id
            WHERE
                invoiceid = ".$this->invoiceid."
            ORDER BY
                lineitems.displayorder"; */

        $this->queryresult = $this->db->query($querystatement);

}//end method


    function show(){



        if($this->queryresult === NULL)
            $this->get();

        $count = 1;
        while($therecord = $this->db->fetchArray($this->queryresult)){



            ?><tr id="li<?php echo $count?>" class="lineitems">

                <td colspan="2" class="lineitemsLeft" <?php if($this->invoicetype == "Void" || $this->invoicetype == "Invoice") echo 'nowrap="nowrap"'?>>
                    <input type="hidden" id="li<?php echo $count?>ProductID" value="<?php echo $therecord["productid"]?>"/>

                    <div>
                        <?php if($therecord["partnumber"] || $therecord["partname"] ) {?>
                        <p><?php echo formatVariable($therecord["partnumber"]) ?></p>
        <!--                <p class="important"><?//php echo formatVariable($therecord["partname"])?></p> -->

                        <?php } else
                                echo "&nbsp;";
                        ?>
                    </div>
                </td>



    <!--            <td><input id="li<?//php echo $count?>Memo" class="lineitemMemos" value="<?//php echo formatVariable($therecord["memo"])?>"/></td> -->
            <!--    <td><input id="li<?////php echo $count?>Frontfinish" class="lineitemFrontfinishs" value="<?/////php echo formatVariable($therecord["frontfinish"])?>"/></td>
                <td><input id="li<?////php echo $count?>Backfinish" class="lineitemBackfinishs" value="<?////php echo formatVariable($therecord["backfinish"])?>"/></td> -->
                   <td><input id="li<?php echo $count?>Comment" class="lineitemComments" value="<?php echo formatVariable($therecord["comment"])?>"/></td>

                     <td><input id="li<?php echo $count?>Nipple" class="lineitemNipples" value="<?php echo formatVariable($therecord["nipple"])?>"/></td>



                     <td><input id="li<?php echo $count?>Polish" class="lineitemPolishes" value="<?php echo formatVariable($therecord["polish"])?>"/></td>




                     <td><input id="li<?php echo $count?>Edgeseal" class="lineitemEdgeseals" value="<?php echo formatVariable($therecord["edgeseal"])?>"/></td>

                     <td><input id="li<?php echo $count?>Leads" class="lineitemLeadss" value="<?php echo $therecord["leads"]?>"/></td>



                     <td><input id="li<?php echo $count?>Leadsl" class="lineitemLeadsls" value="<?php echo $therecord["leadsl"]?>"/></td>
                 <!--    <td><input id="li<?///php echo $count?>RQ" class="lineitemRQs" value="<?///php echo $therecord["RQ"]?>"/></td> -->



                     <td><input id="li<?php echo $count?>Width" class="lineitemWidths" value="<?php echo $therecord["width"]?>"/></td>
                 <td>    <input id="li<?php echo $count?>Widthf" class="lineitemWidthfs" value="<?php echo $therecord["widthf"]?>"/></td>

                     <td><input id="li<?php echo $count?>Height" class="lineitemHeights" value="<?php echo $therecord["height"]?>"/>  </td>
                     <td> <input id="li<?php echo $count?>Heightf" class="lineitemHeightfs" value="<?php echo $therecord["heightf"]?>"/></td>
                     <!--
                                             <td><input id="li<?///php echo $count?>Claveid" class="uneditable lineitemClaveids" value="<?////php echo formatVariable($therecord["claveid"])?>"/></td>

                     <td><input id="li<?////php echo $count?>Claveid2" class="uneditable lineitemClaveid2s" value="<?/////php echo formatVariable($therecord["claveid2"])?>"/></td>

    -->
                <td><input id="li<?php echo $count?>Quantity" class="lineitemQuantities" value="<?php echo formatVariable($therecord["quantity"])?>"/></td>

       <td><input id="li<?php echo $count?>Sqft" class="uneditable lineitemSqfts" value="<?php echo formatVariable(ceil($therecord["width"]*$therecord["height"]/144)) ?>"/></td>


       <td><input id="li<?php echo $count?>Sqfttot" class="uneditable lineitemSqfttots" value="<?php echo formatVariable (ceil($therecord["width"]*$therecord["height"]/144* $therecord["quantity"]))?>"/></td> 


      <!--    <td><input id="li<?///php echo $count?>unitweight" class=" uneditable lineitemUnitweight" value="<?///php echo $unitweight ?>"/></td> -->

       <!--    <td><input id="li<?///php echo $count?>totalweight" class="uneditable lineitemTotalweight" value="<?///php echo $totalweight ?>"/></td>   -->                    







                <td class="lineitemsButtonTDs">
                    <div id="li<?php echo $count?>ButtonsDiv" class="lineitemsButtonDivs">
                        <button type="button" id="li<?php echo $count?>ButtonDelete" class="graphicButtons buttonMinus LIDelButtons" title="Remove line item"><span>-</span></button><br />
                        <button type="button" id="li<?php echo $count?>ButtonMoveUp" class="graphicButtons buttonUp LIUpButtons" title="Move Item Up"><span>Up</span></button><br />
                        <button type="button" id="li<?php echo $count?>ButtonMoveDown" class="graphicButtons buttonDown LIDnButtons" title="Move Item Down"><span>Dn</span></button><br />
                    </div>                      
                </td>

            </tr>


            <?php

            $count++;

        }//endwhile

    }//end method


    function set($itemlist, $userid = NULL){

        if(!$userid)
            $userid = $_SESSION["userinfo"]["id"];

        $deletestatement = "
            DELETE FROM
                lineitems
            WHERE
                invoiceid = ".$this->invoiceid;

        $this->db->query($deletestatement);

        $itemsArray = explode(";;", $itemlist);

        $count = 0;

        foreach($itemsArray as $item){

            $itemRecord = explode("::", $item);
            if(count($itemRecord) > 1){

                $insertstatement ="
                    INSERT INTO
                        lineitems(
                            invoiceid, 
                            productid, 
                            comment,
                            nipple,
                            polish,
                            edgeseal,
                            leads,
                            leadsl,
                            width,
                            widthf,
                            height,
                            heightf,
                            quantity,
                            sqft,
                            sqfttot,
                            displayorder,
                            createdby,
                            creationdate,
                            modifiedby,
                            modifieddate
                        )
                    VALUES (
                        ".$this->invoiceid.",
                        ".((int) $itemRecord[0]).",
                        '".$itemRecord[1]."',
                        '".$itemRecord[2]."',
                        '".$itemRecord[3]."',
                        '".$itemRecord[4]."',
                        '".$itemRecord[5]."',
                        '".$itemRecord[6]."',
                        '".$itemRecord[7]."',
                        '".$itemRecord[8]."',
                        '".$itemRecord[9]."',
                        '".$itemRecord[10]."',
                        '".$itemRecord[11]."',
                        '".$itemRecord[12]."',
                        '".$itemRecord[13]."',
                        ".$count.",
                        ".$userid.",
                        NOW(),
                        ".$userid.",
                        NOW()

                    )";

                $this->db->query($insertstatement);


                $count++;

            }//end if

        }//endforeach                       

    }//end method


    //this isn't actually updating my invoices table...
    function updatesglitots() {

        $sglitotalsupdate="UPDATE invoices i LEFT JOIN (SELECT invoiceid, SUM(quantity) AS sgtotqty FROM lineitems li GROUP BY invoiceid) AS t ON i.invoiceid = t.invoiceid SET i.totalquantity = t.sgtotqty WHERE i.invoiceid = ".$this->invoiceid."";


    $this->db->query($sglitotalsupdate);


    }

}//end class

}// end if

我想做这样的事情：

    "UPDATE invoices
        SET totalquantity = SUM('".$itemRecord[11]."')
        WHERE invoices.id = ".$this->invoiceid."
    ;"

注意：'".$itemRecord[11]."' 是保存用户创建的每个订单项的数量的数组值。

或...

     "UPDATE invoices INNER JOIN lineitems
         ON invoices.id=lineitems.invoiceid
         SET invoices.totalquantity = SUM(lineitems.quantity)
         WHERE invoices.id=lineitems.invoiceid
      ;"

请帮忙，因为我尝试了几种不同的方法...

谢谢！！

Answer 1

您不能将 mysql 中的 sum 函数与 php 中的 array 类型结合使用。

您可以在 php 的 array 上使用 php 的 array_sum 函数。

"UPDATE invoices
    SET totalquantity = '". array_sum($itemRecord[11]) ."'
    WHERE invoices.id = ".$this->invoiceid."
;"

Answer 2

您可以使用相关子查询，或将发票 table 连接到派生的 table。插入所有行项目后，这将计算总计。

"UPDATE invoices i 
SET totalquantity = (
    SELECT SUM(quantity) 
    FROM lineitems li 
    WHERE li.invoiceid = i.invoiceid)
WHERE i.invoiceid = " . $this->invoiceid;

// or

"UPDATE invoices i 
LEFT JOIN
   (SELECT invoiceid, SUM(quantity) AS total 
    FROM lineitems li 
    GROUP BY invoiceid) AS t
ON i.invoiceid = t.invoiceid
SET i.totalquantity = t.total
WHERE i.invoiceid = " . $this->invoiceid;

i、li 和 t 是 invoices table、lineitems table 和 lineitems 的别名分别在第二个查询中派生 table。

使用数组中存储的 php 值的总和更新 MySQL table 列

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