Cake PHP 选择下拉

Question

我是 CakePHP 的新手，需要一些帮助。我烘焙了我的第一个应用程序，但我无法让它按我想要的方式运行。

我有两个表，players 和 teams，还有一个 join 表 player_teams。表格显示正常。但我想将选择区域更改为下拉菜单。随着时间的推移，玩家可以拥有许多团队（为此，我在连接表中添加了从和到日期列），但我希望玩家在创建时就被分配到一个团队。

这是我尝试过的：

<?php
echo $this->Form->input('player_name');
        echo $this->Form->input('player_last_name');
        echo $this->Form->input('player_number');
        echo $this->Form->input('player_birthday');
        echo $this->Form->input('teams._ids', [ 'multiple' => false, 'options' => $teams,]);
    ?>

它不会更改为下拉列表。我也试过这个：

echo $this->Form->input('teams._ids',  ['type' => 'select', 'multiple' => false, 'options' => $teams, 'empty' => true]);

最后一个将选择更改为下拉菜单，但无论我选择什么都不会进入数据库。

这是玩家的控制器：

public function add()
{
    $player = $this->Players->newEntity();
    if ($this->request->is('post')) {
        $player = $this->Players->patchEntity($player, $this->request->data);
        if ($this->Players->save($player)) {
            $this->Flash->success(__('The player has been saved.'));
            return $this->redirect(['action' => 'index']);
        } else {
            $this->Flash->error(__('The player could not be saved. Please, try again.'));
        }
    }
    $teams = $this->Players->Teams->find('list', ['limit' => 200]);
    $this->set(compact('player', 'teams'));
    $this->set('_serialize', ['player']);
}

这是 PlayersTeamController：

public function add()
{
    $playersTeam = $this->PlayersTeams->newEntity();
    if ($this->request->is('post')) {
        $playersTeam = $this->PlayersTeams->patchEntity($playersTeam, $this->request->data);
        if ($this->PlayersTeams->save($playersTeam)) {
            $this->Flash->success(__('The players team has been saved.'));
            return $this->redirect(['action' => 'index']);
        } else {
            $this->Flash->error(__('The players team could not be saved. Please, try again.'));
        }
    }
    $players = $this->PlayersTeams->Players->find('list', ['limit' => 200]);
    $teams = $this->PlayersTeams->Teams->find('list', ['limit' => 200]);
    $this->set(compact('playersTeam', 'players', 'teams'));
    $this->set('_serialize', ['playersTeam']);
}

任何帮助将不胜感激。谢谢！

Answer 1

The Cakebook: 3.0

你试过了吗：

echo $this->Form->select(
  'teams'
  ,$teams->toArray()
  ,[
    'multiple' => false,
    'class' => '_ids',
    'empty' => true
  ]
);

Answer 2

只需像自己需要的数据结构，即

[
    'teams' => [
        '_ids' => [
            // single id here
        ]
    ]
]

Cookbook > Database Access & ORM > Saving Data > Converting BelongsToMany Data

正确的数组元素名称

您可以通过例如指定适当的元素 name 属性值来做到这一点，例如

echo $this->Form->input(
    'teams',
    [
        'name' => 'teams[_ids][0]'
        //'options' => $teams // this is optional when following the conventions
    ]
);

它将根据选项自动选择select 类型。

您将需要一些额外的逻辑来防止进一步的选择被注入，因为像teams[_ids][0] 这样的数组名称将允许安全组件无法检测到此类篡改。这可以通过验证来完成，或者通过在Model.beforeMarshal 事件中准备数据来完成。

这是一个验证示例

public function validationCreate(Validator $validator) {
    $validator = $this->validationDefault($validator);

    $teamsValidator = (new Validator())
        ->requirePresence('_ids')
        ->notEmpty('_ids')
        ->add('_ids', 'valid', [
            'rule' => function($value) {
                return is_array($value) && count($value) === 1;
            }
        ]);

    $validator
        ->requirePresence('teams')
        ->notEmpty('teams')
        ->addNested('teams', $tagsValidator);

    return $validator;
}

$player = $this->Players->patchEntity($player, $this->request->data, [
    'validate' => 'create'
]);

• Cookbook > Database Access & ORM > Saving Data > Validation and patchEntity
• API > \Cake\Validation\Validator::addNested()

自定义、单值元素名称

另一种选择是指定一个非数组名称，并结合在 Model.beforeMarshal 事件中准备数据，例如

echo $this->Form->input('teams', ['name' => 'initial_team']);

public function beforeMarshal(Event $event, \ArrayObject $data, \ArrayObject $options)
{
    if (isset($data['initial_team'])) {
        $data['teams'] = [
            '_ids' => [
                $data['initial_team']
            ]
        ];
    }
}

Cookbook > Database Access & ORM > Saving Data > Modifying Request Data Before Building Entities

注意

两者都将保留 CakePHP 的魔力，就像编组器将传递的 _ids 转换为实体一样，以便正确保存关联、自动选择输入选项、自动选择输入类型等...

Answer 3

如果你设置了正确的associations，你可以直接从PlayersController中保存。根本不需要 PlayersTeamController。当您使用请求数据修补新创建的播放器entity 时，关联的表数据将自动进入其中并由实体save() 命令保存，仅作为其一级关联。