Test of ViewableData Gridfield

Company.php

<?php

use SilverStripe\View\ArrayData;

class Company extends ArrayData
{

    public function __construct($id=0, $data=[])
    {
        if (empty($data)) {
            return parent::__construct([
                'ID' => $id
            ]);
        }

        list($name, $type, $value, $ceo) = $data;
        return parent::__construct([
            'ID' => $id,
            'Company' => $name,
            'Industry' => $type,
            'Valuation' => $value,
            'CEO' => $ceo
        ]);
    }

    public function canCreate() {
        return true;
    }

    public function canDelete() {
        return true;
    }

    public function canEdit() {
        return true;
    }

}

Page.php

<?php

namespace {

    use SilverStripe\CMS\Model\SiteTree;
    use SilverStripe\Forms\FieldList;
    use SilverStripe\Forms\GridField\GridField;
    use SilverStripe\Forms\GridField\GridFieldAddNewButton;
    use SilverStripe\Forms\GridField\GridFieldConfig_Base;
    use SilverStripe\Forms\GridField\GridFieldConfig_RecordEditor;
    use SilverStripe\Forms\GridField\GridFieldConfig_RecordViewer;
    use SilverStripe\Forms\GridField\GridFieldDataColumns;
    use SilverStripe\Forms\GridField\GridFieldDeleteAction;
    use SilverStripe\Forms\GridField\GridFieldDetailForm;
    use SilverStripe\Forms\GridField\GridFieldExportButton;
    use SilverStripe\Forms\GridField\GridFieldFilterHeader;
    use SilverStripe\Forms\GridField\GridFieldLazyLoader;
    use SilverStripe\Forms\GridField\GridFieldPrintButton;
    use SilverStripe\Forms\TextField;
    use SilverStripe\LinkField\Form\LinkField;
    use SilverStripe\LinkField\Models\Link;
    use SilverStripe\FrameworkTest\Model\Company;
    use SilverStripe\ORM\ArrayList;
    use SilverStripe\View\ArrayData;
    use SilverStripe\ORM\Search\BasicSearchContext;

    class Page extends SiteTree
    {
        private static $db = [];

        private static $has_one = [
            'MyLink' => Link::class,
        ];


        public function getCMSFields()
        {
            $fields = parent::getCMSFields();
            $fields->addFieldToTab('Root.Main', LinkField::create('MyLink', 'Link'));

            $fields->addFieldsToTab('Root.ViewableData', $this->GridField());

            $fields->addFieldsToTab('Root.FancyObject', $this->GridFieldTwo());

            return $fields;
        }

        public function GridField()
        {
            $rawData = Company::create()->data();
            /** @var ArrayList $dataset */
            $dataset = ArrayList::create();
            foreach ($rawData as $id => $company) {
                list($name, $type, $value, $ceo) = $company;
                $dataset->push(ArrayData::create([
                    'ID' => $id,
                    'Company' => $name,
                    'Industry' => $type,
                    'Valuation' => $value,
                    'CEO' => $ceo
                ]));
            }

            $config = GridFieldConfig_RecordViewer::create();
            $config = GridFieldConfig_RecordEditor::create();
            // $config = GridFieldConfig_Base::create();
            $config
                ->getComponentByType(GridFieldDataColumns::class)
                ->setDisplayFields([
                    // 'ID' => 'ID',
                    'Company' => 'Company',
                    'Industry' => 'Industry',
                    'Valuation' => 'Valuation',
                    'CEO' => 'CEO',
                ]);
            $config
                ->getComponentByType(GridFieldDetailForm::class)
                ->setFields(FieldList::create([
                    // TextField::create('ID'),
                    TextField::create('Company'),
                    TextField::create('Industry'),
                    TextField::create('Valuation'),
                    TextField::create('CEO'),
                ]));

            $config->removeComponentsByType(GridFieldAddNewButton::class);
            $config->removeComponentsByType(GridFieldDeleteAction::class);
            $searchContext = BasicSearchContext::create(null);
            $searchContext->setFields(FieldList::create(
                TextField::create('ID'),
                TextField::create('Company'),
                TextField::create('Industry'),
                TextField::create('Valuation'),
                TextField::create('CEO'),
            ));
            $config
                ->getComponentByType(GridFieldFilterHeader::class)
                ->setSearchContext($searchContext);


            return GridField::create('MyArrayList', 'My Array List', $dataset, $config);
        }

        public function GridFieldTwo()
        {
            $rawData = Company::create()->data();
            /** @var ArrayList $dataset */
            $dataset = ArrayList::create();
            foreach ($rawData as $id => $company) {
                $dataset->push(new \Company($id, $company));
            }

            $config = GridFieldConfig_RecordEditor::create();
            $config
                ->getComponentByType(GridFieldDataColumns::class)
                ->setDisplayFields([
                    'Company' => 'Company',
                    'Industry' => 'Industry',
                    'Valuation' => 'Valuation',
                    'CEO' => 'CEO',
                ]);
            $config
                ->getComponentByType(GridFieldDetailForm::class)
                ->setFields(FieldList::create([
                    TextField::create('Company'),
                    TextField::create('Industry'),
                    TextField::create('Valuation'),
                    TextField::create('CEO'),
                ]));

            // $config->removeComponentsByType(GridFieldAddNewButton::class);
            // $config->removeComponentsByType(GridFieldDeleteAction::class);
            $searchContext = BasicSearchContext::create(null);
            $searchContext->setFields(FieldList::create(
                TextField::create('ID'),
                TextField::create('Company'),
                TextField::create('Industry'),
                TextField::create('Valuation'),
                TextField::create('CEO'),
            ));
            $config
                ->getComponentByType(GridFieldFilterHeader::class)
                ->setSearchContext($searchContext);

            $config->addComponent(GridFieldExportButton::create('buttons-before-left'));
            $config->addComponent(GridFieldPrintButton::create('buttons-before-left'));
            $config->addComponent(GridFieldLazyLoader::create());


            return GridField::create('MyArrayListTwo', 'My Array List', $dataset, $config);
        }
    }
}