Merge pull request #11348 from creative-commoners/pulls/6/replace-extension-subclasses

API Replace Extension subclasses

src/Core/Config/Middleware/ExtensionMiddleware.php

@@ -10,7 +10,6 @@ use SilverStripe\Config\Middleware\MiddlewareCommon;
 use SilverStripe\Core\ClassInfo;
 use SilverStripe\Core\Config\Config;
 use SilverStripe\Core\Extension;
-use SilverStripe\ORM\DataExtension;
 
 class ExtensionMiddleware implements Middleware
 {
@@ -83,8 +82,6 @@ class ExtensionMiddleware implements Middleware
                 // Skip base classes
                 switch ($extensionClassParent) {
                     case Extension::class:
-                    case DataExtension::class:
-                        continue 2;
                     default:
                         // continue
                 }

src/Core/Extensible.php

@@ -154,7 +154,6 @@ trait Extensible
      * Keep in mind that the extension will only be applied to new
      * instances, not existing ones (including all instances created through {@link singleton()}).
      *
-     * @see http://doc.silverstripe.org/framework/en/trunk/reference/dataextension
      * @param string $classOrExtension Class that should be extended - has to be a subclass of {@link Object}
      * @param string $extension Subclass of {@link Extension} with optional parameters
      *  as a string, e.g. "Versioned"
@@ -256,7 +255,7 @@ trait Extensible
      * @param string $class If omitted, will get extensions for the current class
      * @param bool $includeArgumentString Include the argument string in the return array,
      *  FALSE would return array("Versioned"), TRUE returns array("Versioned('Stage','Live')").
-     * @return array Numeric array of either {@link DataExtension} class names,
+     * @return array Numeric array of either {@link Extension} class names,
      *  or eval'ed class name strings with constructor arguments.
      */
     public static function get_extensions($class = null, $includeArgumentString = false)
@@ -501,7 +500,7 @@ trait Extensible
      *
      * This method also provides lazy-population of the extension_instances property.
      *
-     * @return Extension[] Map of {@link DataExtension} instances, keyed by classname.
+     * @return Extension[] Map of {@link Extension} instances, keyed by classname.
      */
     public function getExtensionInstances()
     {

src/Core/Extension.php

@@ -7,7 +7,6 @@ use SilverStripe\ORM\DataObject;
 
 /**
  * Add extension that can be added to an object with {@link Object::add_extension()}.
- * For {@link DataObject} extensions, use {@link DataExtension}.
  * Each extension instance has an "owner" instance, accessible through
  * {@link getOwner()}.
  * Every object instance gets its own set of extension instances,

src/Forms/CompositeValidator.php

@@ -24,7 +24,7 @@ use SilverStripe\ORM\ValidationResult;
  *   return $compositeValidator
  * }
  *
- * Or by implementing the updateCMSCompositeValidator() method in a DataExtension:
+ * Or by implementing the updateCMSCompositeValidator() method in an Extension:
  *
  * protected function updateCMSCompositeValidator(CompositeValidator $compositeValidator): void
  * {

src/ORM/Connect/TempDatabase.php

@@ -6,10 +6,10 @@ use Exception;
 use SilverStripe\Core\ClassInfo;
 use SilverStripe\Core\Config\Config;
 use SilverStripe\Core\Environment;
+use SilverStripe\Core\Extension;
 use SilverStripe\Core\Injector\Injectable;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
 use SilverStripe\ORM\DataObject;
 use SilverStripe\ORM\DB;
 
@@ -148,9 +148,9 @@ class TempDatabase
             return;
         }
 
-        // Some DataExtensions keep a static cache of information that needs to
+        // Some Extensions keep a static cache of information that needs to
         // be reset whenever the database is killed
-        foreach (ClassInfo::subclassesFor(DataExtension::class) as $class) {
+        foreach (ClassInfo::subclassesFor(Extension::class) as $class) {
             $toCall = [$class, 'on_db_reset'];
             if (is_callable($toCall)) {
                 call_user_func($toCall);
@@ -171,10 +171,10 @@ class TempDatabase
 
         $this->getConn()->clearAllData();
 
-        // Some DataExtensions keep a static cache of information that needs to
+        // Some Extensions keep a static cache of information that needs to
         // be reset whenever the database is cleaned out
         $classes = array_merge(
-            ClassInfo::subclassesFor(DataExtension::class),
+            ClassInfo::subclassesFor(Extension::class),
             ClassInfo::subclassesFor(DataObject::class)
         );
         foreach ($classes as $class) {

src/ORM/DataExtension.php

@@ -1,297 +0,0 @@
-<?php
-
-namespace SilverStripe\ORM;
-
-use SilverStripe\Core\Config\Config;
-use SilverStripe\Core\Extension;
-use SilverStripe\Forms\FieldList;
-use SilverStripe\Forms\CompositeValidator;
-use SilverStripe\ORM\Queries\SQLSelect;
-use SilverStripe\Security\Member;
-use Exception;
-use SilverStripe\Dev\Deprecation;
-
-/**
- * An extension that adds additional functionality to a {@link DataObject}.
- *
- * @template T of DataObject
- * @extends Extension<T>
- * @deprecated 5.3.0 Subclass SilverStripe\Core\Extension\Extension instead
- */
-abstract class DataExtension extends Extension
-{
-    public function __construct()
-    {
-        // Wrapping with Deprecation::withNoReplacement() to avoid triggering deprecation notices
-        // as we are unable to update existing subclasses of this class until a new major
-        // unless we add in the pointless empty methods that are in this class
-        Deprecation::withNoReplacement(function () {
-            $class = Extension::class;
-            Deprecation::notice('5.3.0', "Subclass $class instead", Deprecation::SCOPE_CLASS);
-        });
-        parent::__construct();
-    }
-
-    /**
-     * Hook for extension-specific validation.
-     *
-     * @param ValidationResult $validationResult Local validation result
-     * @throws ValidationException
-     */
-    protected function updateValidate(ValidationResult $validationResult)
-    {
-    }
-
-    /**
-     * Edit the given query object to support queries for this extension
-     *
-     * @param SQLSelect $query Query to augment.
-     * @param DataQuery $dataQuery Container DataQuery for this SQLSelect
-     */
-    protected function augmentSQL(SQLSelect $query, DataQuery $dataQuery = null)
-    {
-    }
-
-    /**
-     * Update the database schema as required by this extension.
-     *
-     * When duplicating a table's structure, remember to duplicate the create options
-     * as well. See {@link Versioned->augmentDatabase} for an example.
-     */
-    protected function augmentDatabase()
-    {
-    }
-
-    /**
-     * Augment a write-record request.
-     *
-     * @param array $manipulation Array of operations to augment.
-     */
-    protected function augmentWrite(&$manipulation)
-    {
-    }
-
-    /**
-     * Extend the owner's onBeforeWrite() logic
-     *
-     * See {@link DataObject::onBeforeWrite()} for context.
-     */
-    protected function onBeforeWrite()
-    {
-    }
-
-    /**
-     * Extend the owner's onAfterWrite() logic
-     *
-     * See {@link DataObject::onAfterWrite()} for context.
-     */
-    protected function onAfterWrite()
-    {
-    }
-
-    /**
-     * Extend the owner's onBeforeDelete() logic
-     *
-     * See {@link DataObject::onBeforeDelete()} for context.
-     */
-    protected function onBeforeDelete()
-    {
-    }
-
-    /**
-     * Extend the owner's onAfterDelete() logic
-     *
-     * See {@link DataObject::onAfterDelete()} for context.
-     */
-    protected function onAfterDelete()
-    {
-    }
-
-    /**
-     * Extend the owner's requireDefaultRecords() logic
-     *
-     * See {@link DataObject::requireDefaultRecords()} for context.
-     */
-    protected function onRequireDefaultRecords()
-    {
-    }
-
-    /**
-     * Extend the owner's populateDefaults() logic
-     *
-     * See {@link DataObject::populateDefaults()} for context.
-     */
-    protected function onAfterPopulateDefaults()
-    {
-    }
-
-    /**
-     * Extend the owner's onAfterBuild() logic
-     *
-     * See {@link DataObject::onAfterBuild()} for context.
-     */
-    protected function onAfterBuild()
-    {
-    }
-
-    /**
-     * Influence the owner's can() permission check value to be disallowed (false),
-     * allowed (true) if no other processed results are to disallow, or open (null) to not
-     * affect the outcome.
-     *
-     * See {@link DataObject::can()} and {@link DataObject::extendedCan()} for context.
-     *
-     * @param Member $member
-     * @return bool|null
-     */
-    protected function can($member)
-    {
-    }
-
-    /**
-     * Influence the owner's canEdit() permission check value to be disallowed (false),
-     * allowed (true) if no other processed results are to disallow, or open (null) to not
-     * affect the outcome.
-     *
-     * See {@link DataObject::canEdit()} and {@link DataObject::extendedCan()} for context.
-     *
-     * @param Member $member
-     * @return bool|null
-     */
-    protected function canEdit($member)
-    {
-    }
-
-    /**
-     * Influence the owner's canDelete() permission check value to be disallowed (false),
-     * allowed (true) if no other processed results are to disallow, or open (null) to not
-     * affect the outcome.
-     *
-     * See {@link DataObject::canDelete()} and {@link DataObject::extendedCan()} for context.
-     *
-     * @param Member $member
-     * @return bool|null
-     */
-    protected function canDelete($member)
-    {
-    }
-
-    /**
-     * Influence the owner's canCreate() permission check value to be disallowed (false),
-     * allowed (true) if no other processed results are to disallow, or open (null) to not
-     * affect the outcome.
-     *
-     * See {@link DataObject::canCreate()} and {@link DataObject::extendedCan()} for context.
-     *
-     * @param Member $member
-     * @return bool|null
-     */
-    protected function canCreate($member)
-    {
-    }
-
-    /**
-     * Define extra database fields
-     *
-     * Return a map where the keys are db, has_one, etc, and the values are
-     * additional fields/relations to be defined.
-     *
-     * @param string $class since this method might be called on the class directly
-     * @param string $extension since this can help to extract parameters to help set indexes
-     * @return array Returns a map where the keys are db, has_one, etc, and
-     *               the values are additional fields/relations to be defined.
-     */
-    public function extraStatics($class = null, $extension = null)
-    {
-        return [];
-    }
-
-    /**
-     * This function is used to provide modifications to the form in the CMS
-     * by the extension. By default, no changes are made. {@link DataObject->getCMSFields()}.
-     *
-     * Please consider using {@link updateFormFields()} to globally add
-     * formfields to the record. The method {@link updateCMSFields()}
-     * should just be used to add or modify tabs, or fields which
-     * are specific to the CMS-context.
-     *
-     * Caution: Use {@link FieldList->addFieldToTab()} to add fields.
-     *
-     * @param FieldList $fields FieldList with a contained TabSet
-     */
-    protected function updateCMSFields(FieldList $fields)
-    {
-    }
-
-    /**
-     * This function is used to provide modifications to the Validators used on a DataObject.
-     *
-     * Caution: Use {@link CompositeValidator->addValidator()} to add Validators.
-     *
-     * @param CompositeValidator $compositeValidator
-     */
-    protected function updateCMSCompositeValidator(CompositeValidator $compositeValidator): void
-    {
-    }
-
-    /**
-     * This function is used to provide modifications to the form used
-     * for front end forms. {@link DataObject->getFrontEndFields()}
-     *
-     * Caution: Use {@link FieldList->push()} to add fields.
-     *
-     * @param FieldList $fields FieldList without TabSet nesting
-     */
-    protected function updateFrontEndFields(FieldList $fields)
-    {
-    }
-
-    /**
-     * This is used to provide modifications to the form actions
-     * used in the CMS. {@link DataObject->getCMSActions()}.
-     *
-     * @param FieldList $actions FieldList
-     */
-    protected function updateCMSActions(FieldList $actions)
-    {
-    }
-
-    /**
-     * this function is used to provide modifications to the summary fields in CMS
-     * by the extension
-     * By default, the summaryField() of its owner will merge more fields defined in the extension's
-     * $extra_fields['summary_fields']
-     *
-     * @param array $fields Array of field names
-     */
-    protected function updateSummaryFields(&$fields)
-    {
-        $summary_fields = Config::inst()->get(static::class, 'summary_fields');
-        if ($summary_fields) {
-            // if summary_fields were passed in numeric array,
-            // convert to an associative array
-            if ($summary_fields && array_key_exists(0, $summary_fields ?? [])) {
-                $summary_fields = array_combine(array_values($summary_fields ?? []), array_values($summary_fields ?? []));
-            }
-            if ($summary_fields) {
-                $fields = array_merge($fields, $summary_fields);
-            }
-        }
-    }
-
-    /**
-     * this function is used to provide modifications to the fields labels in CMS
-     * by the extension
-     * By default, the fieldLabels() of its owner will merge more fields defined in the extension's
-     * $extra_fields['field_labels']
-     *
-     * @param array $labels Array of field labels
-     */
-    protected function updateFieldLabels(&$labels)
-    {
-        $field_labels = Config::inst()->get(static::class, 'field_labels');
-        if ($field_labels) {
-            $labels = array_merge($labels, $field_labels);
-        }
-    }
-}

src/ORM/DataObject.php

@@ -48,7 +48,7 @@ use stdClass;
  *
  * <h2>Extensions</h2>
  *
- * See {@link Extension} and {@link DataExtension}.
+ * See {@link Extension}
  *
  * <h2>Permission Control</h2>
  *
@@ -1212,7 +1212,7 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      * Validate the current object.
      *
      * By default, there is no validation - objects are always valid!  However, you can overload this method in your
-     * DataObject sub-classes to specify custom validation, or use the hook through DataExtension.
+     * DataObject sub-classes to specify custom validation, or use the hook through Extension.
      *
      * Invalid objects won't be able to be written - a warning will be thrown and no write will occur.  onBeforeWrite()
      * and onAfterWrite() won't get called either.
@@ -1236,8 +1236,6 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      * database.  Don't forget to call parent::onBeforeWrite(), though!
      *
      * This called after {@link $this->validate()}, so you can be sure that your data is valid.
-     *
-     * @uses DataExtension::onBeforeWrite()
      */
     protected function onBeforeWrite()
     {
@@ -1252,8 +1250,6 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      * You can overload this to act upon changes made to the data after it is written.
      * $this->changed will have a record
      * database.  Don't forget to call parent::onAfterWrite(), though!
-     *
-     * @uses DataExtension::onAfterWrite()
      */
     protected function onAfterWrite()
     {
@@ -1282,8 +1278,6 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      * Event handler called before deleting from the database.
      * You can overload this to clean up or otherwise process data before delete this
      * record.  Don't forget to call parent::onBeforeDelete(), though!
-     *
-     * @uses DataExtension::onBeforeDelete()
      */
     protected function onBeforeDelete()
     {
@@ -1563,8 +1557,6 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      *  - $this->onBeforeWrite() gets called beforehand.
      *  - Extensions such as Versioned will amend the database-write to ensure that a version is saved.
      *
-     * @uses DataExtension::augmentWrite()
-     *
      * @param boolean       $showDebug Show debugging information
      * @param boolean       $forceInsert Run INSERT command rather than UPDATE, even if record already exists
      * @param boolean       $forceWrite Write to database even if there are no changes
@@ -1737,7 +1729,6 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      * Delete this data object.
      * $this->onBeforeDelete() gets called.
      * Note that in Versioned objects, both Stage and Live will be deleted.
-     * @uses DataExtension::augmentSQL()
      */
     public function delete()
     {
@@ -2596,7 +2587,7 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      * which returns a {@link FieldList} suitable for a {@link Form} object.
      * If not overloaded, we're using {@link scaffoldFormFields()} to automatically
      * generate this set. To customize, overload this method in a subclass
-     * or extended onto it by using {@link DataExtension->updateCMSFields()}.
+     * or use an Extension which implements updateCMSFields()
      *
      * <code>
      * class MyCustomClass extends DataObject {
@@ -2671,7 +2662,7 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      * Used for simple frontend forms without relation editing
      * or {@link TabSet} behaviour. Uses {@link scaffoldFormFields()}
      * by default. To customize, either overload this method in your
-     * subclass, or extend it by {@link DataExtension->updateFrontEndFields()}.
+     * subclass, or create an Extensiona and implement updateFrontEndFields()
      *
      * @param array $params See {@link scaffoldFormFields()}
      * @return FieldList Always returns a simple field collection without TabSet.
@@ -3685,8 +3676,6 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
 
     /**
      * Check the database schema and update it as necessary.
-     *
-     * @uses DataExtension::augmentDatabase()
      */
     public function requireTable()
     {
@@ -3767,8 +3756,6 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      * database is built, after the database tables have all been created. Overload
      * this to add default records when the database is built, but make sure you
      * call parent::requireDefaultRecords().
-     *
-     * @uses DataExtension::requireDefaultRecords()
      */
     public function requireDefaultRecords()
     {
@@ -3917,7 +3904,6 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
 
         $fields = $rewrite;
 
-        // apply DataExtensions if present
         $this->extend('updateSearchableFields', $fields);
 
         return $fields;
@@ -4028,6 +4014,17 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
         $rawFields = $this->config()->get('summary_fields');
 
         // Merge associative / numeric keys
+        // Key could be a mixture of key types for example
+        // base class $summary_fields = ['Title'] - key is 0
+        // extension class $summary-fields = ['Title' => 'Custom Title'] - key is 'Title'
+        // Sort by numeric keys first so that any associative keys will override them later
+        uksort($rawFields, function ($a, $b) {
+            if (is_int($a) && !is_int($b)) {
+                return -1;
+            } elseif (!is_int($a) && is_int($b)) {
+                return 1;
+            }
+        });
         $fields = [];
         foreach ($rawFields as $key => $value) {
             if (is_int($key)) {
@@ -4035,7 +4032,6 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
             }
             $fields[$key] = $value;
         }
-
         if (!$fields) {
             $fields = [];
             // try to scaffold a couple of usual suspects
@@ -4558,8 +4554,8 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
 
     /**
      * Extension point to add more cache key components.
-     * The framework extend method will return combined values from DataExtension method(s) as an array
-     * The method on your DataExtension class should return a single scalar value. For example:
+     * The framework extend method will return combined values from Extension method(s) as an array
+     * The method on your Extension class should return a single scalar value. For example:
      *
      * protected function cacheKeyComponent()
      * {

src/ORM/Hierarchy/Hierarchy.php

@@ -10,7 +10,7 @@ use SilverStripe\ORM\SS_List;
 use SilverStripe\ORM\ValidationResult;
 use SilverStripe\ORM\ArrayList;
 use SilverStripe\ORM\DataObject;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 use SilverStripe\ORM\DB;
 use SilverStripe\Versioned\Versioned;
 use SilverStripe\Core\Config\Config;
@@ -24,9 +24,9 @@ use SilverStripe\View\ViewableData;
  *
  * @property int $ParentID
  * @method DataObject Parent()
- * @extends DataExtension<DataObject&static>
+ * @extends Extension<DataObject&static>
  */
-class Hierarchy extends DataExtension
+class Hierarchy extends Extension
 {
     /**
      * The lower bounds for the amount of nodes to mark. If set, the logic will expand nodes until it reaches at least

src/ORM/Search/FulltextSearchable.php

@@ -7,7 +7,7 @@ use SilverStripe\CMS\Model\SiteTree;
 use SilverStripe\Core\Config\Config;
 use SilverStripe\CMS\Controllers\ContentController;
 use SilverStripe\ORM\Connect\MySQLSchemaManager;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 use Exception;
 
 /**
@@ -21,9 +21,9 @@ use Exception;
  * unless "File" is excluded from FulltextSearchable::enable().
  *
  * @template T of SiteTree|File
- * @extends DataExtension<T>
+ * @extends Extension<T>
  */
-class FulltextSearchable extends DataExtension
+class FulltextSearchable extends Extension
 {
 
     /**

src/Security/InheritedPermissionFlusher.php

@@ -4,14 +4,14 @@ namespace SilverStripe\Security;
 
 use Psr\Log\InvalidArgumentException;
 use SilverStripe\Core\Flushable;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 use SilverStripe\ORM\DataObject;
 use SilverStripe\Core\Cache\MemberCacheFlusher;
 
 /**
- * @extends DataExtension<Member|Group>
+ * @extends Extension<Member|Group>
  */
-class InheritedPermissionFlusher extends DataExtension implements Flushable
+class InheritedPermissionFlusher extends Extension implements Flushable
 {
     /**
      * @var MemberCacheFlusher[]

src/Security/InheritedPermissionsExtension.php

@@ -2,7 +2,7 @@
 
 namespace SilverStripe\Security;
 
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 use SilverStripe\ORM\ManyManyList;
 
 /**
@@ -15,9 +15,9 @@ use SilverStripe\ORM\ManyManyList;
  * @method ManyManyList<Group> ViewerGroups()
  * @method ManyManyList<Member> ViewerMembers()
  *
- * @extends DataExtension<DataObject>
+ * @extends Extension<DataObject>
  */
-class InheritedPermissionsExtension extends DataExtension
+class InheritedPermissionsExtension extends Extension
 {
     private static array $db = [
         'CanViewType' => "Enum('Anyone, LoggedInUsers, OnlyTheseUsers, OnlyTheseMembers, Inherit', 'Inherit')",

src/Security/Member.php

@@ -686,7 +686,7 @@ class Member extends DataObject
      * Validator is used when saving a {@link CMSProfileController} or added to
      * any form responsible for saving a users data.
      *
-     * To customize the required fields, add a {@link DataExtension} to member
+     * To customize the required fields, add a {@link Extension} to member
      * calling the `updateValidator()` method.
      *
      * @return Member_Validator

src/Security/Member_Validator.php

@@ -9,7 +9,7 @@ use SilverStripe\Forms\RequiredFields;
  * Member Validator
  *
  * Custom validation for the Member object can be achieved either through an
- * {@link DataExtension} on the Member_Validator object or, by specifying a subclass of
+ * {@link Extension} on the Member_Validator object or, by specifying a subclass of
  * {@link Member_Validator} through the {@link Injector} API.
  * The Validator can also be modified by adding an Extension to Member and implement the
  * <code>updateValidator</code> hook.

src/Security/Security.php

@@ -1098,7 +1098,7 @@ class Security extends Controller implements TemplateGlobalProvider
                 return false;
             }
 
-            // HACK: DataExtensions aren't applied until a class is instantiated for
+            // HACK: Extensions aren't applied until a class is instantiated for
             // the first time, so create an instance here.
             singleton($class);
 

tests/php/Forms/FormScaffolderTest/ArticleExtension.php

@@ -5,9 +5,9 @@ namespace SilverStripe\Forms\Tests\FormScaffolderTest;
 use SilverStripe\Dev\TestOnly;
 use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\TextField;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class ArticleExtension extends DataExtension implements TestOnly
+class ArticleExtension extends Extension implements TestOnly
 {
     private static $db = [
         'ExtendedField' => 'Varchar'

tests/php/Forms/GridField/GridFieldTest/StadiumExtension.php

@@ -3,11 +3,11 @@
 namespace SilverStripe\Forms\Tests\GridField\GridFieldTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 use SilverStripe\ORM\Filters\FulltextFilter;
 use SilverStripe\Forms\Tests\GridField\GridFieldTest\StadiumExtension;
 
-class StadiumExtension extends DataExtension implements TestOnly
+class StadiumExtension extends Extension implements TestOnly
 {
     protected function updateSearchableFields(&$fields)
     {

tests/php/ORM/DataExtensionTest/AllMethodNames.php

@@ -4,9 +4,9 @@ namespace SilverStripe\ORM\Tests\DataExtensionTest;
 
 use SilverStripe\Core\ClassInfo;
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class AllMethodNames extends DataExtension implements TestOnly
+class AllMethodNames extends Extension implements TestOnly
 {
     public function allMethodNames()
     {

tests/php/ORM/DataExtensionTest/AppliedToDO.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\ORM\Tests\DataExtensionTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class AppliedToDO extends DataExtension implements TestOnly
+class AppliedToDO extends Extension implements TestOnly
 {
 
     public function testMethodApplied()

tests/php/ORM/DataExtensionTest/CMSFieldsBaseExtension.php

@@ -5,12 +5,12 @@ namespace SilverStripe\ORM\Tests\DataExtensionTest;
 use SilverStripe\Dev\TestOnly;
 use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\TextField;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
 /**
  * Extension to top level test class, tests that updateCMSFields work
  */
-class CMSFieldsBaseExtension extends DataExtension implements TestOnly
+class CMSFieldsBaseExtension extends Extension implements TestOnly
 {
     private static $db = [
         'ExtendedFieldKeep' => 'Varchar(255)',

tests/php/ORM/DataExtensionTest/ContactRole.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\ORM\Tests\DataExtensionTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class ContactRole extends DataExtension implements TestOnly
+class ContactRole extends Extension implements TestOnly
 {
     private static $db = [
         'Website' => 'Varchar',

tests/php/ORM/DataExtensionTest/Extension1.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\ORM\Tests\DataExtensionTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class Extension1 extends DataExtension implements TestOnly
+class Extension1 extends Extension implements TestOnly
 {
 
     protected function canOne($member = null)

tests/php/ORM/DataExtensionTest/Extension2.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\ORM\Tests\DataExtensionTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class Extension2 extends DataExtension implements TestOnly
+class Extension2 extends Extension implements TestOnly
 {
 
     protected function canOne($member = null)

tests/php/ORM/DataExtensionTest/Faves.php

@@ -3,12 +3,11 @@
 namespace SilverStripe\ORM\Tests\DataExtensionTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 use SilverStripe\ORM\Tests\DataExtensionTest\RelatedObject;
 
-class Faves extends DataExtension implements TestOnly
+class Faves extends Extension implements TestOnly
 {
-
     private static $many_many = [
         'Faves' => RelatedObject::class
     ];

tests/php/ORM/DataExtensionTest/PlayerExtension.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\ORM\Tests\DataExtensionTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class PlayerExtension extends DataExtension implements TestOnly
+class PlayerExtension extends Extension implements TestOnly
 {
 
     public static function get_extra_config($class = null, $extensionClass = null, $args = null)

tests/php/ORM/DataObjectTest/Team_Extension.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\ORM\Tests\DataObjectTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class Team_Extension extends DataExtension implements TestOnly
+class Team_Extension extends Extension implements TestOnly
 {
     private static $summary_fields = [
         'Title' => 'Custom Title', // override non-associative 'Title'

tests/php/ORM/ManyManyListTest/IndirectSecondaryExtension.php

@@ -3,7 +3,7 @@
 namespace SilverStripe\ORM\Tests\ManyManyListTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 use SilverStripe\ORM\ManyManyList;
 
 /**
@@ -12,7 +12,7 @@ use SilverStripe\ORM\ManyManyList;
  *
  * @method ManyManyList Primary()
  */
-class IndirectSecondaryExtension extends DataExtension implements TestOnly
+class IndirectSecondaryExtension extends Extension implements TestOnly
 {
     private static $db = [
         'Title' => 'Varchar(255)'

tests/php/ORM/RelatedDataServiceTest.php

@@ -106,7 +106,7 @@ class RelatedDataServiceTest extends SapphireTest
 
     public function testUsageHasOneHubExtension()
     {
-        // Add DataExtension and reset database so that tables + columns get added
+        // Add Extension and reset database so that tables + columns get added
         Hub::add_extension(HubExtension::class);
         DataObject::reset();
         RelatedDataServiceTest::resetDBSchema(true, true);
@@ -212,7 +212,7 @@ class RelatedDataServiceTest extends SapphireTest
 
     public function testUsageManyManyWithoutBelongsHubExtension()
     {
-        // Add DataExtension and reset database so that tables + columns get added
+        // Add Extension and reset database so that tables + columns get added
         Hub::add_extension(HubExtension::class);
         DataObject::reset();
         RelatedDataServiceTest::resetDBSchema(true, true);

tests/php/ORM/RelatedDataServiceTest/HubExtension.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\ORM\Tests\RelatedDataServiceTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class HubExtension extends DataExtension implements TestOnly
+class HubExtension extends Extension implements TestOnly
 {
     private static $has_one = [
         'ExtHO' => Node::class

tests/php/Security/MemberTest/AlwaysFailExtension.php

@@ -3,12 +3,12 @@
 namespace SilverStripe\Security\Tests\MemberTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
 /**
  * Extension that adds additional validation criteria
  */
-class AlwaysFailExtension extends DataExtension implements TestOnly
+class AlwaysFailExtension extends Extension implements TestOnly
 {
     protected function updatePHP($data, $form)
     {

tests/php/Security/MemberTest/EditingAllowedDeletingDeniedExtension.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\Security\Tests\MemberTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class EditingAllowedDeletingDeniedExtension extends DataExtension implements TestOnly
+class EditingAllowedDeletingDeniedExtension extends Extension implements TestOnly
 {
 
     protected function canView($member = null)

tests/php/Security/MemberTest/ExtendedChangePasswordExtension.php

@@ -3,13 +3,13 @@
 namespace SilverStripe\Security\Tests\MemberTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 use SilverStripe\ORM\ValidationResult;
 
 /**
  * Extension that does something extra when changing a member's password
  */
-class ExtendedChangePasswordExtension extends DataExtension implements TestOnly
+class ExtendedChangePasswordExtension extends Extension implements TestOnly
 {
     protected function onBeforeChangePassword($newPassword, $valid)
     {

tests/php/Security/MemberTest/FieldsExtension.php

@@ -5,9 +5,9 @@ namespace SilverStripe\Security\Tests\MemberTest;
 use SilverStripe\Dev\TestOnly;
 use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\TextField;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class FieldsExtension extends DataExtension implements TestOnly
+class FieldsExtension extends Extension implements TestOnly
 {
     protected function updateCMSFields(FieldList $fields)
     {

tests/php/Security/MemberTest/SurnameMustMatchFirstNameExtension.php

@@ -3,12 +3,12 @@
 namespace SilverStripe\Security\Tests\MemberTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
 /**
  * Extension that adds additional validation criteria
  */
-class SurnameMustMatchFirstNameExtension extends DataExtension implements TestOnly
+class SurnameMustMatchFirstNameExtension extends Extension implements TestOnly
 {
     protected function updatePHP($data, $form)
     {

tests/php/Security/MemberTest/ValidatorExtension.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\Security\Tests\MemberTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class ValidatorExtension extends DataExtension implements TestOnly
+class ValidatorExtension extends Extension implements TestOnly
 {
 
     protected function updateValidator($validator)

tests/php/Security/MemberTest/ViewingAllowedExtension.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\Security\Tests\MemberTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class ViewingAllowedExtension extends DataExtension implements TestOnly
+class ViewingAllowedExtension extends Extension implements TestOnly
 {
 
     protected function canView($member = null)

tests/php/Security/MemberTest/ViewingDeniedExtension.php

@@ -3,9 +3,9 @@
 namespace SilverStripe\Security\Tests\MemberTest;
 
 use SilverStripe\Dev\TestOnly;
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class ViewingDeniedExtension extends DataExtension implements TestOnly
+class ViewingDeniedExtension extends Extension implements TestOnly
 {
 
     protected function canView($member = null)

tests/php/i18n/i18nTest/_fakewebroot/i18nothermodule/code/i18nTestModuleDecorator.php

@@ -1,8 +1,8 @@
 <?php
 
-use SilverStripe\ORM\DataExtension;
+use SilverStripe\Core\Extension;
 
-class i18nTestModuleExtension extends DataExtension
+class i18nTestModuleExtension extends Extension
 {
 
     public static $db = [