Define default values for Laravel form fields

问题

To pre-populate form field, we can add 'value' to form field in create.blade.php:

{{ Form::text('title', 'Some default title') }}

Is there a way to do that task elsewhere (maybe in model or controller?). I'd like to have code for form fields identical in create & edit view. Thanks!

回答1:

Okay, so here we are... I used Laravel's form model binding in the example. (I work with User model/db table). If this topic is not clear for you, take a look at this http://laravel.com/docs/html#form-model-binding

// Controller

class UsersController extends BaseController
{

    ...

    // Method to show 'create' form & initialize 'blank' user's object
    public function create()
    {
        $user = new User;
        return View::make('users.form', compact('user'));
    }

    // This method should store data sent form form (for new user)
    public function store()
    {
        print_r(Input::all());
    }

    // Retrieve user's data from DB by given ID & show 'edit' form   
    public function edit($id)
    {
        $user = User::find($id);
        return View::make('users.form', compact('user'));
    }

    // Here you should process form data for user that exists already.
    // Modify/convert some input data maybe, save it then...
    public function update($id)
    {
        $user = User::find($id);
        print_r($user->toArray());
    }

    ...

}

And here come the view file served by controller.

// The view file - self describing I think
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    @if(!$user->id)
    {{ Form::model($user, ['route' => 'admin.users.store']) }}
    @else
    {{ Form::model($user, ['route' => ['admin.users.update', $user->id], 'method' => 'put']) }}
    @endif
        {{ Form::text('firstName') }}

        {{ Form::text('lastName') }}

        {{ Form::submit() }}
    {{ Form::close() }}
</body>
</html>

回答2:

Yes, let's consider the following example:

View:

{{ Form::text('title', $title) }}

Controller:

$title = 'Some default title';
if($article) {
    $title = $article->title;
}
return View::make('user.login')->with('title', $title)

Then you will have a text-input with either Some default title or the title from $article, if $article isn't equal to false

回答3:

All you need to do is include a conditional in your blade template.

Lets assume your database table has a field myfield, which you want to default to mydefault.

Just include the following in a partial view which is called by the create and edit views:

@if(isset($myfield))
{{ Form::input('text','myfield') }}
@else
{{ Form::input('text','myfield','mydefault') }}
@endif

You don't have to anything else.

回答4:

if you mean placeholder you can do this

{{ Form::password('password', array('placeholder' => 'password'))}}

回答5:

Probably easier (Laravel 5):

{{ Form::text('title', isset($yourModel) ? null : 'Some default title') }}

That is to assume you are using the form as a partial. It should populate the value if the model for the form exists (you are editing or patching record) else it should show you the default you wish.

回答6:

When you are using the Schema builder (in Migrations or somewhere else):

Schema::create( 
      'posts', function($table) {
          $table->string('title', 30)->default('New post'); 
      }
);

来源：https://stackoverflow.com/questions/17510355/define-default-values-for-laravel-form-fields

标签

php

laravel

default-value