【发布时间】：2020-03-12 12:42:23
【问题描述】：
我有一个用于管理物品购买和问题的 codeigniter 项目。表格如下：
store_item
+---------+-----------+
| item_id | item_name |
+---------+-----------+
| 1 | Pen |
| 2 | A4 |
| 3 | Ruler |
| 4 | Stapler |
| 5 | A3 |
+---------+-----------+
store_update_stock
+-----------------+------------+---------------+-------------+
| update_stock_id | invoice_no | prchased_date | order_state |
+-----------------+------------+---------------+-------------+
| 1 | A0001 | 2019-10-05 | purchase |
| 2 | A0002 | 2019-10-06 | purchase |
| 3 | B0003 | 2019-10-07 | issue |
+-----------------+------------+---------------+-------------+
store_update_stock_details
+-------------------------+-----------------+------+-----+------------+
| update_stock_details_id | update_stock_id | item | qty | unit_price |
+-------------------------+-----------------+------+-----+------------+
| 1 | 1 | 1 | 50 | 10.00 |
| 2 | 1 | 4 | 10 | 250.00 |
| 3 | 2 | 1 | 100 | 10.50 |
| 4 | 3 | 1 | 2 | 10.00 |
| 5 | 3 | 4 | 1 | 250.00 |
| 6 | 3 | 1 | 4 | 10.50 |
+-------------------------+-----------------+------+-----+------------+
然后我需要在执行问题后找到项目的余额。在此示例中，所需的输出如下，并且应在我的视图中查看输出以再次执行问题。 （换句话说，即使是相同的商品也应该以不同的价格单独查看。
+-----------+-----+------------+
| item_name | qty | unit_price |
+-----------+-----+------------+
| Pen | 48 | 10.00 |
| Pen | 96 | 10.50 |
+-----------+-----+------------+
控制器
public function isExistProduct()
{
$id = $this->input->get('q');
$data = $this->Item_model->isExistProduct($id);
if (!empty($data)) {
echo json_encode(array('status' => true, 'data' => $data));
} else {
echo json_encode(array('status' => false));
}
}
模型（使用此查询）
public function isExistProduct($q)
{
if (!empty($q)) {
$this->db->select("store_item.item_id, store_item.item_name, sum(qty) as qty, unit_price as up");
$this->db->from('store_update_stock_details');
$this->db->join('store_update_stock', 'store_update_stock_details.update_stock_id=store_update_stock.update_stock_id');
$this->db->join('store_item', 'store_update_stock_details.item=store_item.item_id');
$this->db->where("store_update_stock.status=1 and store_item.item_id= $q");
$this->db->group_by( 'store_item.item_id','store_update_stock_details.unit_price');
$q1 = $this->db->get();
if ($q1->num_rows() > 0) {
return $q1->result_array();
}
return 0;
}
}
Relevant parts of View
======================
<script type="text/javascript">
$(document).on("change", "#item", function () {
$.ajax({
'url': '<?=site_url("item/isExistProduct/?q=")?>' + $('#item').val(),
'method': 'GET',
'success': function (data) {
var jData = JSON.parse(data);
if (jData.status == true) {
jData.data.forEach(data => {
$('#request_table').append('<tr>' +
'<td ><span id="product" >' + jData.data[0].item_name + '</span>' +
'<input type="hidden" id="item_id[]" name="item_id[]" value="' + jData.data[0].item_id + '">' +
'</td>' +
'<td class="text-center">' + jData.data[0].qty + '</td>' +
'<td class="text-center"><input class="form-control text-right" disabled id="sales_price[]" name="sales_price[]" value="' + jData.data[0].up+ '"></td>' +
'<td class="text-center"><input class="form-control text-center rquantity" data-qty-bal="' + jData.data[0].qty + '" autofocus required type="number" step="any" id="qty[]" name="qty[]" ></td>' +
'<td class="text-center" ><i class="fa fa-remove remove" style="cursor: pointer"></i></td>' +
'</tr>');
})
}
},
'error': function () {
}
});
});
</script>
<div class="col-md-12 column">
<div class="col-md-12">
<div class="control-group table-group">
<label class="table-label">Issue Items *</label>
<div class="controls table-controls">
<table id="request_table"
class="table items table-striped table-bordered table-condensed table-hover">
<thead>
<tr class="" style="background-color: #ff66a3 !important;">
<th class="col-md-5">Item Name</th>
<th class="text-center col-md-2">Available Qty</th>
<th class="text-center col-md-2">Unit Price</th>
<th class="text-center col-md-2">Issuing Qty</th>
</th>
<th class="col-md-2" style="width: 30px !important; text-align: center;">
<i class="fa fa-trash-o" style="opacity:0.5; filter:alpha(opacity=50);"></i>
</th>
</tr>
</thead>
<tbody></tbody>
<tfoot>
<tr id="tfoot" class="tfoot active">
<th colspan="2">Total</th>
<th class="text-right"></th>
<th class="text-center">0</th>
<th class="text-center"><i class="fa fa-trash-o"
style="opacity:0.5; filter:alpha(opacity=50);"></i>
</th>
</tr>
</tfoot>
</table>
</div>
</div>
</div>
</div>
<div class="row">
<div class="col-md-8"></div>
<div class="col-md-4">
<button type="submit" id="add_sale" class="btn btn-primary btn-block">Issue</button>
</div>
</div>
谁能帮帮我？
【问题讨论】：
标签： mysql codeigniter datatable