我有以下问题：
我在客户和分支机构之间建立了多对多的关系。这是经过测试的并且正在工作。但是现在我不想使用这种关系在客户数据表中显示分支的名称。
我收到此错误：
“SQLSTATE [42S22]：未找到列：1054 '字段列表'中的未知列'branches.name'（SQL：选择客户。*，客户的分支。名称来自客户，其中customers.deleted_at 为空订单，id asc 限制 50 偏移量 0 )"
我不确定如何在客户表旁边选择正确的表。
这是负责调用数据表类的控制器方法：
public function fetch(Request $request) {
Notification::visit(CustomersRetrieved::class);
return response()->json((new CustomerDatatable($request))->render());
}
这是数据表类：
<?php
/**
* Created by PhpStorm.
* User: NEWPC-1
* Date: 4-1-2019
* Time: 08:31
*/
namespace Modules\CRM\Datatables;
use App\Support\Datatables\Datatable;
use App\Support\Datatables\DatatableContract;
use Illuminate\Support\Facades\Log;
use Modules\CRM\Models\Customer;
class CustomerDatatable extends Datatable implements DatatableContract
{
/**
* @return mixed|string
*/
public function model()
{
return Customer::class;
}
/**
* @return array|mixed
*/
public function orders()
{
return [
'code' => 'code',
'name' => 'name',
'branch' => 'branch',
'email' => 'email',
'phone_number' => 'phone_number',
'postal_code' => 'postal_code',
'city' => 'city',
'address' => 'address',
'address_number' => 'address_number',
];
}
/**
* @return mixed
*/
protected function newQuery()
{
$query = parent::newQuery()->with('branches')->select(['customers.*','branches.name']);
Log::info(json_encode($query));
if(isset($this->input['query']) && strlen($q = $this->input['query']) > 0) {
$query->search($q);
}
return $query;
}
/**
* @return mixed
*/
protected function getQueryCount()
{
$query = parent::newQuery();
if(isset($this->input['query']) && strlen($q = $this->input['query']) > 0) {
$query->search($q);
}
return $query->count();
}
public function exportable()
{
return [
['key' => 'name'],
['key' => 'branch'],
['key' => 'address'],
['key' => 'address_number'],
['key' => 'postal_code'],
['key' => 'city'],
];
}
}
这是相应的javascript：
customer_datatable = customer_element.CustomDataTable({
rows: {
beforeTemplate: function (row, data, index) {
row.on('click', function (e) {
if ($(e.target).hasClass('kt-badge--info') || $(e.target).hasClass('la') || $(e.target).hasClass('fa') || $(e.target).hasClass('btn') || $(e.target).hasClass('kt-datatable__cell--center')) {
} else {
window.open(customer_element.data('route-url') + '/crm/customers/' + data.id, '_blank');
}
});
},
},
detail: {
title: customer_element.data('text-load_contacts'),
content: contactsInit,
},
columns: [
{
field: 'id',
title: '',
sortable: false,
width: 20,
textAlign: 'center',
},
{
field: 'code',
width: 75,
title: customer_element.data('column-code'),
template: function (row) {
return row.code;
}
},
{
field: 'name',
title: customer_element.data('column-name'),
width: 300,
template: function (row) {
return '<a href="' + customer_element.data('route-show').replace('__id__', row.id) + '">' + row.name + '</a>';
}
},
//this is the part causing/part of the problem
{
field: 'branch',
title: customer_element.data('column-branch'),
width: 300,
template: function (row) {
console.log(row);
}
},
{
field: 'email',
title: customer_element.data('column-email'),
width: 250,
template: function (row) {
if (row.email === '') {
return '';
}
var e = row.email.split(','), r = new Array();
$.each(e, function (i, x) {
r.push('<a href="mailto:' + $.trim(x) + '" class="kt-badge kt-badge--info kt-badge--inline kt-badge--pill">' + $.trim(x) + '</a>');
});
return '<span style="line-height:2rem !important;" title="E-mail this customer">' + r.join(' ') + '</span>';
}
},
{
field: 'phone_number',
title: customer_element.data('column-phone_number'),
width: 100,
template: function (row) {
if (row.phone_number.length === 0) {
return '';
}
let number = parsePhoneNumber(row.phone_number);
return '<a href="tel:' + phoneUtil.format(number, PNF.E164) + '" class="kt-badge kt-badge--brand kt-badge--inline kt-badge--pill">' + phoneUtil.format(number, PNF.NATIONAL) + '</a>';
}
},
{
field: 'postal_code',
title: customer_element.data('column-postal_code'),
width: 100,
template: function (row) {
return row.postal_code;
}
},
{
field: 'city',
title: customer_element.data('column-city'),
width: 100,
template: function (row) {
return row.city;
}
},
],
});
所以这就是我最终解决它的方法，这要归功于 Ali Alghozali 和这篇文章： MySQL join many to many single row
protected function newQuery()
{
$query = parent::newQuery()
->leftJoin('branch_customers', 'customers.id', '=', 'branch_customers.customer_id')
->leftJoin('branches', 'branches.id', '=', 'branch_customers.branch_id')
->select(['customers.*','branches.name as branch']);
Log::info(json_encode($query));
if(isset($this->input['query']) && strlen($q = $this->input['query']) > 0) {
$query->search($q);
}
return $query;
}