CakePHP在SELECT输入中选择默认值

Using CakePHP:

I have a many-to-one relationship, let's pretend it's many Leafs to Trees. Of course, I baked a form to add a Leaf to a Tree, and you can specify which Tree it is with a drop-down box ( tag) created by the form helper.

我有多对一的关系,让我们假装它是很多叶子到树。当然,我烘焙了一个表单来向树中添加Leaf,您可以使用表单助手创建的下拉框(标记)指定它是哪个树。

The only thing is, the SELECT box always defaults to Tree #1, but I would like it to default to the Tree it's being added to:

唯一的一点是,SELECT框始终默认为Tree#1,但我希望它默认为它被添加到的树:

For example, calling example.com/leaf/add/5 would bring up the interface to add a new Leaf to Tree #5. The dropdown box for Leaf.tree_id would default to "Tree 5", instead of "Tree 1" that it currently defaults to.

例如,调用example.com/leaf/add/5将调出接口以向Tree#5添加新的Leaf。 Leaf.tree_id的下拉框默认为“Tree 5”,而不是它当前默认的“Tree 1”。

What do I need to put in my Leaf controller and Leaf view/add.ctp to do this?

我需要在Leaf控制器和Leaf视图/ add.ctp中放置什么来执行此操作?

9 个解决方案

#1

You should never use select(), or text(), or radio() etc.; it's terrible practice. You should use input():

你永远不应该使用select(),text()或radio()等;这是一种可怕的做法。你应该使用input():

$form->input('tree_id', array('options' => $trees));

Then in the controller:

然后在控制器中:

$this->data['Leaf']['tree_id'] = $id;

#2

In CakePHP 1.3, use 'default'=>value to select the default value in a select input:

在CakePHP 1.3中,使用'default'=> value选择select输入中的默认值:

$this->Form->input('Leaf.id', array('type'=>'select', 'label'=>'Leaf', 'options'=>$leafs, 'default'=>'3'));

#3

the third parameter should be like array('selected' =>value)

第三个参数应该是数组('selected'=> value)

#4

 $this->Form->input('Leaf.id', array(
'type'=>'select',
'label'=>'Leaf',
'options'=>$leafs,
'value'=>2
));

This will select default second index position value from list of option in $leafs.

这将从$ leafs中的选项列表中选择默认的第二个索引位置值。

#5

Assuming you are using form helper to generate the form:

假设您使用表单助手生成表单:

select(string $fieldName, array $options, mixed $selected, array $attributes, boolean $showEmpty)

Set the third parameter to set the selected option.

设置第三个参数以设置所选选项。

#6

To make a text default in a select box use the $form->select() method. Here is how you do it.

要在选择框中创建文本默认值,请使用$ form-> select()方法。这是你如何做到的。

$options = array('m'=>'Male','f'=>'Female','n'=>'neutral');

$form->select('Model.name',$options,'f');

The above code will select Female in the list box by default.

上面的代码默认会在列表框中选择Female。

Keep baking...

#7

FormHelper::select(string $fieldName, array $options, 
array $attributes)

$attributes['value'] to set which value should be selected default

$ attributes ['value']设置应选择默认值

<?php echo $this->Form->select('status', $list, array(
    'empty' => false, 
    'value' => 1)
); ?>

#8

If you are using cakephp version 3.0 and above, then you can add default value in select input using empty attribute as given in below example.

如果您使用的是cakephp 3.0及更高版本,则可以使用空属性在select输入中添加默认值,如下例所示。

echo $this->Form->input('category_id', ['options'=>$categories,'empty'=>'Choose']);

#9

The best answer to this could be

对此的最佳答案可能是

Don't use selct for this job use input instead

请勿将selct用于此作业使用输入

like this

echo  $this->Form->input('field_name', array(
          'type' => 'select',
            'options' => $options_arr, 
            'label' => 'label here',
            'value' => $id,  // default value
            'escape' => false,  // prevent HTML being automatically escaped
            'error' => false,
            'class' => 'form-control' // custom class you want to enter
        ));

Hope it helps.

希望能帮助到你。

#1