CakePHP 3.4：使用联合结果集分页显示重复记录

Question

我正在从俱乐部会员数据库中提取两种类型的会员；我有两种自定义查找器方法来提取它们。这些查找器工作正常。第三个自定义查找器调用其他两个查找器并使用 Union 语句创建单个结果集。结果集的内容是正确的。但是，在 index.ctp 中使用 Paginate 显示完整的结果集（正确），然后重复第二个查找器的内容。联合结果集不包含重复项。看起来 Paginate 对联合结果感到困惑。

来自第三个自定义查找器的代码：

public function findMembersByBadAddress(Query $query, array $options=[])
{
    // Find members records with bad email or mailing addresses 
    // Specify "mailing" or "email" as the "Address" option to select either bad mailing addresses or bad
    // email addresses

    // Specific fields are retrieved so both resultset have the same number of columns. This allows the 
    // Union to work.
    $fieldsToKeep = ['Members.id','Members.first_name','Members.middle_name',
        'Members.last_name','Members.suffix', 'Members.date_joined'];

    if( $options['Address'] == 'mailing' ) {
        $flag = ['MailingAddresses.is_invalid' => true];
        $contain = ['MailingAddresses'];
    } else {
        $flag = ['EmailAddresses.is_invalid' => true];
        $contain = ['EmailAddresses'];
    }

    $query = $this->find('currentFullMembers');
    $query->contain($contain);
    $query->Select($fieldsToKeep);
    $query->where($flag);
    //Log::write('debug', "Count from MembersTable:Full = " . $query->count());

    $flagQuery2 = $this->find('lifetimeMembers');
    $flagQuery2->contain($contain);
    $flagQuery2->Select($fieldsToKeep);
    $flagQuery2->where($flag);
    //Log::write('debug', "Count from MembersTable:Lifetime = " . $flagQuery2->count());

    $query->unionAll($flagQuery2);
    $query->epilog("ORDER BY Members__last_name ASC, Members__first_name ASC");
    //Log::write('debug', "Count from MembersTable = " . $query->count());

    return $query;
}

来自控制器：

                case ('M'): // bad mailing addresses  DONE
                $query = $this->Members->find('membersByBadAddress', ['Address' => 'mailing']);
                $this->set('reportTitle', 'Bad Mailing Addresses');
                break;

...

   $this->set('members', $this->paginate($query, ['limit' => $pageLimit]) );

来自index.ctp

           <table cellpadding="0" cellspacing="0" class='table-condensed'>
            <thead>
                <tr>
                    <th scope="col"><?= $this->Paginator->sort('id') ?></th>
                    <th scope="col"><?= $this->Paginator->sort('first_name') ?></th>
                    <th scope="col"><?= $this->Paginator->sort('middle_name') ?></th>
                    <th scope="col"><?= $this->Paginator->sort('last_name') ?></th>
                    <th scope="col"><?= $this->Paginator->sort('suffix') ?></th>
                    <?php
                        if( $displayJoinDate ) {
                            echo "<th scope='col'>" . $this->Paginator->sort('Date Joined') . "</th>";
                        }
                    ?>
                    <th scope="col" class="actions"><?= __('Actions') ?></th>
                </tr>
                </thead>
                <tbody>
                <?php
        //          Log::write('debug', "Count = " . $members->count());
                     foreach($members as $member) {
                    //   Log::write("debug", $member->first_name . ' ' . $member->last_name);
                        echo "<tr>";
                        echo "<td>" . $this->Number->format($member->id) . "</td>";
                        echo "<td>" . h($member->first_name) . "</td>";
                        echo "<td>" . h($member->middle_name) . "</td>";
                        echo "<td>" . h($member->last_name) . "</td>";
                        echo "<td>" . h($member->suffix) . "</td>";
                        if( $displayJoinDate ) {
                           echo "<td>" . h($member->date_joined) . "</td>";
                        }
                        echo '<td class="actions">';
                            echo $this->Html->link(__('View'), ['action' => 'view', $member->id]);
                            echo $this->Html->link(__('Edit'), ['action' => 'edit', $member->id]);
                            echo $this->Html->link(__('Renew'), ['controller' => 'Dues2', 'action' => 'add', $member->id]);
                     //      <?= $this->Form->postLink(__('Delete'), ['action' => 'delete', $id], 
                     //             ['confirm' => __('Are you sure you want to delete # {0}?', $id)]) 
                        echo "</td>";
                    echo "</tr>";
             }
                ?>
            </tbody>
        </table>

这附近还有吗？

更新

我怀疑问题是由第一个 SELECT 语句之后而不是 UNION 之后的 LIMIT 20 OFFSET 0 引起的。 以下是 DebugKit 的 SQL 日志中显示的 SQL 语句：

SELECT 

后缀.suffix AS

Suffixes__suffix

从 后缀 后缀

（ 选择 Members.id AS

Members__id

， Members.first_name AS

Members__first_name

， Members.middle_name AS

Members__middle_name

， Members.last_name AS

Members__last_name

， 成员.后缀 AS

Members__suffix

, Members.date_joined AS

Members__date_joined

从 会员 会员 INNER JOIN 会费2 会费2 ON ( 成员.member_type = '1' AND Dues2. payment_category = 2 AND Dues2.created >= '2017-10-10 00:00:00' 和 Dues2.created <= '2018-12-31 23:59:59' AND Members.id = (Dues2.member_id) ) LEFT JOIN members SocialMembers ON ( SocialMembers.member_type = 2 AND Members.id = (SocialMembers.full_member_id) ) LEFT JOIN email_addresses EmailAddresses ON Members.id = (EmailAddresses.member_id) WHERE EmailAddresses.is_invalid = 1 GROUP BY Members.id ORDER BY Members.last_name ASC, Members.first_name ASC LIMIT 20 OFFSET 0 ) UNION ALL ( SELECT Members.id AS

Members__id

， Members.first_name AS

Members__first_name

， Members.middle_name AS

Members__middle_name

， Members.last_name AS

Members__last_name

， 成员.后缀 AS

Members__suffix

, Members.date_joined AS

Members__date_joined

从 会员 会员 LEFT JOIN 成员 SocialMembers ON ( SocialMembers.member_type = 2 AND Members.id = (SocialMembers.full_member_id) ） LEFT JOIN email_addresses EmailAddresses ON Members.id = (EmailAddresses.member_id) 在哪里 （ 会员已故 = 0 AND Members.member_type = 4 AND EmailAddresses.is_invalid = 1 ） 订购依据 Members.last_name ASC， Members.first_name ASC ） 订购依据 成员__last_name ASC， 成员__first_name ASC

Answer 1

您必须强制分页使用不同的模式：

$this->paginate['YourModel'] = [
    'distinct' => true,
];