Attempt fix for issue #58 where saving user with different parent than default could result in unnecessary pages_parents table updates.

wire/core/Page.php

@@ -1654,8 +1654,10 @@ class Page extends WireData implements \Countable, WireMatchable {
 	protected function setTemplate($tpl) {
 		if(!is_object($tpl)) $tpl = $this->wire('templates')->get($tpl); 
 		if(!$tpl instanceof Template) throw new WireException("Invalid value sent to Page::setTemplate"); 
-		if($this->template && $this->template->id != $tpl->id) {
-			if($this->settings['status'] & Page::statusSystem) throw new WireException("Template changes are disallowed on this page"); 
+		if($this->template && $this->template->id != $tpl->id && $this->isLoaded) {
+			if($this->settings['status'] & Page::statusSystem) {
+				throw new WireException("Template changes are disallowed on this page");
+			}
 			if(is_null($this->templatePrevious)) $this->templatePrevious = $this->template; 
 			$this->trackChange('template', $this->template, $tpl); 
 		}
@@ -1680,10 +1682,14 @@ class Page extends WireData implements \Countable, WireMatchable {
 		if($parent->id && $this->id == $parent->id || $parent->parents->has($this)) {
 			throw new WireException("Page cannot be its own parent");
 		}
+		if($this->isLoaded) {
 			$this->trackChange('parent', $this->parent, $parent);
 			if(($this->parent && $this->parent->id) && $this->parent->id != $parent->id) {
-			if($this->settings['status'] & Page::statusSystem) throw new WireException("Parent changes are disallowed on this page"); 
-			$this->parentPrevious = $this->parent; 
+				if($this->settings['status'] & Page::statusSystem) {
+					throw new WireException("Parent changes are disallowed on this page");
+				}
+				if(is_null($this->parentPrevious)) $this->parentPrevious = $this->parent;
+			}
 		}
 		$this->parent = $parent; 
 		return $this; 

wire/core/PagesEditor.php

@@ -879,7 +879,10 @@ class PagesEditor extends Wire {
 		} while(1);
 
 		if($insertSql) {
-			$sql = "INSERT INTO pages_parents (pages_id, parents_id) VALUES" . rtrim($insertSql, ",");
+			$sql = 
+				'INSERT INTO pages_parents (pages_id, parents_id) ' . 
+				'VALUES' . rtrim($insertSql, ',') . ' ' . 
+				'ON DUPLICATE KEY UPDATE parents_id=VALUES(parents_id)';
 			$database->exec($sql);
 		}
 

wire/modules/Inputfield/InputfieldImage/InputfieldImage.module

@@ -16,6 +16,7 @@
  * @property int|string $minHeight Min height for uploaded images, smaller will be refused (default='')
  * @property string $itemClass Space separated CSS classes for items rendered by this Inputfield. Generally you should append rather than replace.
  * @property int|bool $useImageEditor Whether or not the modal image editor is allowed for this field (default=true)
+ * @property int $adminThumbScale for backwards compatibility only
  *
  * The following properties default values are pulled from $config->adminThumbOptions and can be overridden
  * by setting directly to an instance of this Inputfield:
@@ -969,6 +970,7 @@ class InputfieldImage extends InputfieldFile implements InputfieldItemList {
 	 * Return whether or not admin thumbs should be scaled
 	 * 
 	 * @return bool
+	 * @deprecated
 	 * 
 	 */
 	protected function getAdminThumbScale() {

wire/modules/PageRender.module

@@ -245,6 +245,7 @@ class PageRender extends WireData implements Module, ConfigurableModule {
 	 * 
 	 */
 	public function ___clearCacheFilePages(PageArray $items, Page $page) {
+		if($page) {}
 		foreach($items as $p) {
 			if(((int) $p->template->cache_time) < 1) continue;
 			$cf = $this->getCacheFile($p);
@@ -306,7 +307,6 @@ class PageRender extends WireData implements Module, ConfigurableModule {
 				));
 			}
 		
-			$items = array();
 			if(count($pageIDs)) {
 				$items = $this->wire('pages')->getById($pageIDs, array(
 					'cache'          => false,
@@ -343,7 +343,9 @@ class PageRender extends WireData implements Module, ConfigurableModule {
 			if(!is_string($file)) $file = null;
 			$event->cancelHooks = true;
 			$event->replace = true;
-			$event->return = $event->object->renderField($fieldName, $file);
+			/** @var Page $page */
+			$page = $event->object; 
+			$event->return = $page->renderField($fieldName, $file);
 		}
 	}
 
@@ -390,6 +392,7 @@ class PageRender extends WireData implements Module, ConfigurableModule {
 		$_page = $this->wire('page'); // just in case one page is rendering another, save the previous
 		$config = $this->wire('config');
 		$compiler = null;
+		$compilerOptions = array();
 		if($config->templateCompile && $template->compile) {
 			$compilerOptions = array(
 				'namespace' => strlen(__NAMESPACE__) > 0, 
@@ -665,9 +668,13 @@ class PageRender extends WireData implements Module, ConfigurableModule {
 	/**
 	 * Provide a disk cache clearing capability within the module's configuration screen
 	 * 
+	 * @param array $data
+	 * @return InputfieldWrapper
+	 *
 	 */
 	public function getModuleConfigInputfields(array $data) {
 
+		if($data) {}
 		$path = $this->wire('config')->paths->cache . self::cacheDirName . '/';
 		$numPages = 0;
 		$numFiles = 0;