Fields management

Remove field

The built-in map and editor fields requires the front-end files via cdn, and if there are problems with the network, they can be removed in the following ways

Locate the file app/Admin/bootstrap.php. If the file does not exist, update laravel-admin and create this file.

<?php

use Encore\Admin\Form;

Form::forget('map');
Form::forget('editor');

// or

Form::forget(['map', 'editor']);

This removes the two fields, which can be used to remove the other fields.

Extend the custom field

Extend a PHP code editor based on codemirror with the following steps.

see PHP mode.

Download and unzip the codemirror library to the front-end resource directory, for example, in the directory public/packages/codemirror-5.20.2.

Create a new field class app/Admin/Extensions/PHPEditor.php:

<?php

namespace App\Admin\Extensions;

use Encore\Admin\Form\Field;

class PHPEditor extends Field
{
    protected $view = 'admin.php-editor';

    protected static $css = [
        '/packages/codemirror-5.20.2/lib/codemirror.css',
    ];

    protected static $js = [
        '/packages/codemirror-5.20.2/lib/codemirror.js',
        '/packages/codemirror-5.20.2/addon/edit/matchbrackets.js',
        '/packages/codemirror-5.20.2/mode/htmlmixed/htmlmixed.js',
        '/packages/codemirror-5.20.2/mode/xml/xml.js',
        '/packages/codemirror-5.20.2/mode/javascript/javascript.js',
        '/packages/codemirror-5.20.2/mode/css/css.js',
        '/packages/codemirror-5.20.2/mode/clike/clike.js',
        '/packages/codemirror-5.20.2/mode/php/php.js',
    ];

    public function render()
    {
        $this->script = <<<EOT

CodeMirror.fromTextArea(document.getElementById("{$this->id}"), {
    lineNumbers: true,
    mode: "text/x-php",
    extraKeys: {
        "Tab": function(cm){
            cm.replaceSelection("    " , "end");
        }
     }
});

EOT;
        return parent::render();

    }
}

Static resources in the class can also be imported from outside, see Editor.php

Create a view file resources/views/admin/php-editor.blade.php:

<div class="form-group {!! !$errors->has($label) ?: 'has-error' !!}">

    <label for="{{$id}}" class="col-sm-2 control-label">{{$label}}</label>

    <div class="col-sm-6">

        @include('admin::form.error')

        <textarea class="form-control" id="{{$id}}" name="{{$name}}" placeholder="{{ trans('admin::lang.input') }} {{$label}}" {!! $attributes !!} >{{ old($column, $value) }}</textarea>
    </div>
</div>

Finally, find the file app/Admin/bootstrap.php, if the file does not exist, update laravel-admin, and then create this file, add the following code:

<?php

use App\Admin\Extensions\PHPEditor;
use Encore\Admin\Form;

Form::extend('php', PHPEditor::class);

And then you can use PHP editor in model-form:

$form->php('code');

In this way, you can add any form fields you want to add.

Integrate CKEditor

Here is another example to show you how to integrate ckeditor.

At first download CKEditor, unzip to public directory, for example public/packages/ckeditor/.

Then Write Extension class app/Admin/Extensions/Form/CKEditor.php:

<?php

namespace App\Admin\Extensions\Form;

use Encore\Admin\Form\Field;

class CKEditor extends Field
{
    public static $js = [
        '/packages/ckeditor/ckeditor.js',
        '/packages/ckeditor/adapters/jquery.js',
    ];

    protected $view = 'admin.ckeditor';

    public function render()
    {
        $this->script = "$('textarea.{$this->getElementClassString()}').ckeditor();";

        return parent::render();
    }
}

Add blade file resources/views/admin/ckeditor.blade.php for view admin.ckeditor :

<div class="form-group {!! !$errors->has($errorKey) ?: 'has-error' !!}">

    <label for="{{$id}}" class="col-sm-2 control-label">{{$label}}</label>

    <div class="col-sm-6">

        @include('admin::form.error')

        <textarea class="form-control {{$class}}" id="{{$id}}" name="{{$name}}" placeholder="{{ $placeholder }}" {!! $attributes !!} >{{ old($column, $value) }}</textarea>

        @include('admin::form.help-block')

    </div>
</div>

Register this extension in app/Admin/bootstrap.php:

use Encore\Admin\Form;
use App\Admin\Extensions\Form\CKEditor;

Form::extend('ckeditor', CKEditor::class);

After this you can use ckeditor in your form:

$form->ckeditor('content');