php 从 Laravel 中的多选表单中获取选定值
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/15358227/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Getting selected values from a multiple select form in Laravel
提问by SUB0DH
For generating a drop-down list with an item selected by default, the following is done:
为了生成默认选择的项目的下拉列表，执行以下操作：
echo Form::select('size', array('L' => 'Large', 'M' => 'Medium', 'S' => 'Small'), 'S');
So I generated a drop-down list that has more than one item selected by default, in the following way:
所以我生成了一个下拉列表，默认情况下选择了多个项目，如下所示：
echo Form::select('size', array('L' => 'Large', 'M' => 'Medium', 'S' => 'Small'), array('S', 'M'), array('multiple'));
But how do I get the more than one selected values?
但是如何获得多个选定的值呢？
Input::get('size')returns only the last selected string.
Input::get('size')仅返回最后选择的字符串。
回答by MatRt
First, if you want to have multiple item selected by default, you have to give an array of values as 3rd parameter, not a simple value.
首先，如果你想默认选择多个项目，你必须给出一个值数组作为第三个参数，而不是一个简单的值。
Exemple:
例子：
Form::select('size', array('L' => 'Large', 'M' => 'Medium', 'S' => 'Small'), array('S', 'M'), array('multiple'));
should show the select with S and M selected.
应该显示选择了 S 和 M 的选择。
For the second point, you should try to give a name like size[]instead of size, it could be solve the problem (because your posted select is not a simple value, its an array of values)
对于第二点，您应该尝试给出一个名称，size[]而不是size，它可以解决问题（因为您发布的 select 不是一个简单的值，它是一个值数组）
回答by Farveaz
Usual Select statements go
通常的 Select 语句
<select name="select_name" id="select_name" multiple="multiple">
And the workflow is that Laravel gets the form elements by their name. To make it work, change the name to an array.
工作流程是 Laravel 通过名称获取表单元素。要使其工作，请将名称更改为数组。
<select name="select_name[]" id="select_name" multiple="multiple">
This will make laravel get the values of select as an array of data.
这将使 laravel 以数据数组的形式获取 select 的值。
回答by Ismael Viamontes
According with https://laravelcollective.com/docs/5.2/html#drop-down-lists
根据https://laravelcollective.com/docs/5.2/html#drop-down-lists
Form::select('size[]',['L' => 'Large', 'M' => 'Medium', 'S' => 'Small'], ['S', 'M'], ['multiple' => 'multiple', 'class' => 'form-control']);
By the way, please notice dropdown's name (size[]) if you want to be able to use this field as array in your backend.
顺便说一句，如果您希望能够将此字段用作后端中的数组，请注意下拉列表的名称（size[]）。
Things get tricky when you want uses relationships as value, for instance
例如，当您希望使用关系作为值时，事情会变得棘手
models
user => common fields
size => id, name, slug [
{id : 1 , name : Large, slug : L},
{id : 2 , name : Small, slug : S},
{id : 3 , name : Medium, slug : M}
]
user_size => id, user_id, size_id [
{id :1, user_id:1, size_id:1}
{id :2, user_id:1, size_id:3}
]
So $user->colorswill return something like
所以$user->colors会返回类似的东西
laravel collection
[
USER_SIZE => [ 'user_id' => 1 , size_id' => 1 ],
USER_SIZE => [ 'user_id' => 1, 'size_id' => 3 ]
]
You could do something like, remember User Modelhave a sizesrelationship of one to many with SIZE Model
你可以做一些类似的事情，记住User Model有一个sizes一对多的关系SIZE Model
Form::select('size[]',['L' => 'Large', 'M' => 'Medium', 'S' => 'Small'], $user->sizes->pluck('size')->pluck('slug')->toArray(), ['multiple' => 'multiple', 'class' => 'form-control']);
Hope it helps
希望能帮助到你
回答by azurecorn
Right word is
正确的词是
pluck
采摘
In controller:
在控制器中：
$skills = Skill::pluck('name', 'id');
$selectedSkills = $user->skills()->pluck('skill_user.id');
In blade:
在刀片中：
Form::select('skills[]', $skills, $selectedSkills, ['class' => 'form-control', 'multiple' => 'multiple']) }}
