Styjun

I need to have additional fields on a extended file but there is an error occur.

This will add a gallery tab with GridField which will allow the user to add images.

Not sure what is missing since it is working on other projects.

[Emergency] Uncaught Error: Call to undefined method MyProjectExtensionsBlogPostExtension::BlogGalleryImages()

<?php 


namespace MyProjectExtensions;


use SilverStripeORMDataExtension;
use SilverStripeFormsFieldList;
use SilverStripeFormsTextField;
use SilverStripeFormsGridFieldGridField;
use SilverStripeFormsGridFieldGridFieldConfig_RelationEditor;
use SilverStripeFormsGridFieldGridFieldAddNewButton;
use SilverStripeFormsGridFieldGridFieldDetailForm;
use SilverStripeFormsGridFieldGridFieldEditButton;
use SilverStripeFormsGridFieldGridFieldDeleteAction;
use UndefinedOffsetSortableGridFieldFormsGridFieldSortableRows;
use SilverStripeViewRequirements;
use MyProjectModelBlogGalleryImage;

class BlogPostExtension extends DataExtension 

 private static $db = [
 'SortOrder' => 'Int'
 ];

 private static $has_many = [
 "BlogGalleryImages" => BlogGalleryImage::class,
 ];

 public function updateCMSFields(FieldList $fields) 
 // Add fields here

 $fields->removeByName("SortOrder");
 $options = $this->BlogGalleryImages();
 $gridFieldConfig = GridFieldConfig::create()->addComponents(
 new GridFieldAddNewButton('toolbar-header-right'),
 new GridFieldToolbarHeader(),
 new GridFieldSortableHeader(),
 new GridFieldDataColumns(),
 new GridFieldPaginator(80),
 new GridFieldDetailForm(),
 new GridFieldEditButton(),
 new GridFieldDeleteAction()
 );
 $itemsTable = new GridField("BlogGalleryImages","Gallery Image",$options,$gridFieldConfig);
 $fields->addFieldToTab('Root.Gallery',$itemsTable);

 

Here is the Dataobject file that supposed to be call on BlogPostExtension Class

<?php 

namespace MyProjectModel;

use SilverStripeAssetAdminFormsUploadField;
use SilverStripeAssetsImage;
use SilverStripeORMDataObject;

class BlogGalleryImage extends DataObject

 private static $singular_name = 'Gallery Image';

 private static $db = array(
 'Title' => 'Varchar(256)',
 'SortOrder' => 'Int'
 );

 private static $has_one = array(
 'Image' => Image::class,
 'BlogPosts' => BlogPost::class,
 );

 private static $owns = [
 'Image',
 ];

 private static $summary_fields = array(
 'Thumbnail',
 'Title'
 );

 private static $table_name = 'MyProject_BlogGallery';


 private static $default_sort = "SortOrder ASC";

 public function getCMSFields()
 $fields = parent::getCMSFields();

 $fields->removeByName("SortOrder");
 $fields->removeByName("BlogPostID");
 $fields->addFieldToTab("Root.Main", new TextField("Title","Title"));
 $fields->addFieldToTab("Root.Main", $uploadfield = UploadField::create("Image","Image"));
 $uploadfield->setFolderName("BlogGallery");

 return $fields;
 

 public function getThumbnail()
 if ($icon = $this->Image())
 return $icon->CMSThumbnail();
 else
 return '(No Image)';
 
 

You're calling an instance method on your extension which doesn't exist:

$options = $this->BlogGalleryImages();

This is actually a magic method which represents your has_many relationship "BlogGalleryImages" - this is scaffolded by DataObject. You need to refer to the extension's owner in order to access it:

$options = $this->getOwner()->BlogGalleryImages();