第一步，商品表必须有个字段  代表某个商品 最小订购数量->min_number

打开goods表   在最后字段添加一个min_number  tinyint类型 默认值为0  代表没有最小起订量

sql:alter table `goods` add column `min_number` tinyint (3) UNSIGNED  DEFAULT '0' NOT NULL  after `warn_number`

第二部,在后台添加商品的时候 必须有个text文本框  设置最小起订量

admin/goods.php

在'warn_number'=> 1 , 代码行后插入'min_number'=> 0,

在$warn_number = isset($_POST['warn_number']) ? $_POST['warn_number'] : 0;

后添加代码$min_number = isset($_POST['min_number']) ? $_POST['min_number'] : 0;

第三部 修改添加商品sql语句

修改代码

if ($is_insert){

if ($code == ''){

$sql = "INSERT INTO " . $ecs->table('goods') . " (goods_name, goods_name_style, goods_sn, " .

"cat_id, brand_id, shop_price, market_price, is_promote, promote_price, " .

"promote_start_date, promote_end_date, goods_img, goods_thumb, original_img,keywords, goods_brief, " .

"seller_note, goods_weight, goods_number, warn_number,min_number, integral,give_integral, is_best, is_new, is_hot, ".

"is_on_sale, is_alone_sale, goods_desc, add_time, last_update, goods_type,rank_integral)" .

"VALUES ('$_POST[goods_name]', '$goods_name_style', '$goods_sn', '$catgory_id', " .

"'$brand_id', '$shop_price', '$market_price', '$is_promote','$promote_price', ".

"'$promote_start_date', '$promote_end_date', '$goods_img', '$goods_thumb', '$original_img', ".

"'$_POST[keywords]', '$_POST[goods_brief]', '$_POST[seller_note]', '$goods_weight','$goods_number',".

"'$warn_number','$min_number', '$_POST[integral]', '$give_integral', '$is_best', '$is_new', '$is_hot', '$is_on_sale', '$is_alone_sale', ".

"'$_POST[goods_desc]', '" . gmtime() . "', '". gmtime() ."', '$goods_type','$rank_integral')";

}else{

$sql = "INSERT INTO " . $ecs->table('goods') . " (goods_name, goods_name_style, goods_sn, ".

"cat_id, brand_id, shop_price, market_price, is_promote, promote_price, " .

"promote_start_date, promote_end_date, goods_img, goods_thumb, original_img,keywords, goods_brief, " .

"seller_note, goods_weight, goods_number, warn_number, min_number,integral,give_integral, is_best, is_new, is_hot, is_real, " .

"is_on_sale, is_alone_sale, goods_desc, add_time, last_update, goods_type,extension_code, rank_integral)" .

"VALUES ('$_POST[goods_name]', '$goods_name_style', '$goods_sn', '$catgory_id', " .

"'$brand_id', '$shop_price', '$market_price', '$is_promote','$promote_price', ".

"'$promote_start_date', '$promote_end_date', '$goods_img', '$goods_thumb','$original_img', ".

"'$_POST[keywords]', '$_POST[goods_brief]', '$_POST[seller_note]', '$goods_weight','$goods_number',".

" '$warn_number','$min_number', '$_POST[integral]', '$give_integral', '$is_best','$is_new', '$is_hot', 0, '$is_on_sale', '$is_alone_sale’' ".

" '$_POST[goods_desc]', '" . gmtime() . "', '". gmtime() ."', '$goods_type', '$code', '$rank_integral')";

}

}else{

$sql = "SELECT goods_thumb, goods_img, original_img " .

" FROM " . $ecs->table('goods') .

" WHERE goods_id = '$_REQUEST[goods_id]'";

$row = $db->getRow($sql);

if ($proc_thumb && $goods_img && $row['goods_img'] &&

!goods_parse_url($row['goods_img']))

{

@unlink(ROOT_PATH . $row['goods_img']);

@unlink(ROOT_PATH . $row['original_img']);

}

if ($proc_thumb && $goods_thumb && $row['goods_thumb'] && !goods_parse_url($row['goods_thumb']))

{

@unlink(ROOT_PATH . $row['goods_thumb']);

}

$sql = "UPDATE " . $ecs->table('goods') . " SET " .

"goods_name = '$_POST[goods_name]', " .

"goods_name_style = '$goods_name_style', " .

"goods_sn = '$goods_sn', " .

"cat_id = '$catgory_id', " .

"brand_id = '$brand_id', " .

"shop_price = '$shop_price', " .

"market_price = '$market_price', " .

"is_promote = '$is_promote', " .

"promote_price = '$promote_price', " .

"promote_start_date = '$promote_start_date', " .

"promote_end_date = '$promote_end_date', ";

if ($goods_img)

{

$sql .= "goods_img = '$goods_img', original_img = '$original_img', ";

}

if ($goods_thumb)

{

$sql .= "goods_thumb = '$goods_thumb', ";

}

if ($code != '')

{

$sql .= "is_real=0, extension_code='$code', ";

}

$sql .= "keywords = '$_POST[keywords]', " .

"goods_brief = '$_POST[goods_brief]', " .

"seller_note = '$_POST[seller_note]', " .

"goods_weight = '$goods_weight'," .

"goods_number = '$goods_number', " .

"warn_number = '$warn_number', " .

"min_number = '$min_number', " .

"integral = '$_POST[integral]', " .

"give_integral = '$give_integral', " .

"rank_integral = '$rank_integral', " .

"is_best = '$is_best', " .

"is_new = '$is_new', " .

"is_hot = '$is_hot', " .

"is_on_sale = '$is_on_sale', " .

"is_alone_sale = '$is_alone_sale', " .

"goods_desc = '$_POST[goods_desc]', " .

"last_update = '". gmtime() ."', ".

"goods_type = '$goods_type' " .

"WHERE goods_id = '$_REQUEST[goods_id]' LIMIT 1";

}

第四步修改后台模板文件(在市场价会员价  后边添加设置最小起订量)

admin/templates/goods_info.htm

在

{$lang.lab_shop_price}

{$lang.require_field}

添加

{$lang.lab_min_number}

{$lang.notice_min_number}

第五步:修改语言languages/zh_cn/admin/goods.php

最后添加

$_LANG['lab_min_number']       = '最小购买数量:';

$_LANG['notice_min_number']    = '该商品最小购买数量,0表示按购买数量无限制.'

到现在位置 后台设置全部结束了，不知道大家能懂了没有

下面我门说说前台如何来实现

我以default模板为例子给大家讲解

想做起订量限制，这个必然是在商品购买页面  购买数量框来做限制 最简单的办法就是用JS当然还有别的办法

首先给那些如果给了起订量的商品  购买页面直接显示默认最少购买数量

如果在后台设置的AA商品最少5个    那么进入AA商品页面购买数量默认值就是5

我这样来实现

修改themes/default/goods.dwt

改成

这样就是value  也就是默认值了

最后添加JS判断就好了

themes/default/goods.dwt

在

var qty = document.forms['ECS_FORMBUY'].elements['number'].value;

后添加

{if $goods.min_number}

if(qty < {$goods.min_number})

{

alert('您输入的数字小于此商品最小购买数量：{$goods.min_number}');

qty = {$goods.min_number};

}

{/if}