Fixes #1654: Fixed the issue that a new message source object is generated for every new message being translated

framework/CHANGELOG.md

@@ -11,6 +11,7 @@ Yii Framework 2 Change Log
 - Bug #1509: The SQL for creating Postgres RBAC tables is incorrect (qiangxue)
 - Bug #1545: It was not possible to execute db Query twice, params where missing (cebe)
 - Bug #1550: fixed the issue that JUI input widgets did not property input IDs.
+- Bug #1654: Fixed the issue that a new message source object is generated for every new message being translated (qiangxue)
 - Bug #1582: Error messages shown via client-side validation should not be double encoded (qiangxue)
 - Bug #1591: StringValidator is accessing undefined property (qiangxue)
 - Bug #1597: Added `enableAutoLogin` to basic and advanced application templates so "remember me" now works properly (samdark)

framework/yii/i18n/I18N.php

@@ -157,19 +157,24 @@ class I18N extends Component
 	{
 		if (isset($this->translations[$category])) {
 			$source = $this->translations[$category];
+			if ($source instanceof MessageSource) {
+				return $source;
+			} else {
+				return $this->translations[$category] = Yii::createObject($source);
+			}
 		} else {
 			// try wildcard matching
 			foreach ($this->translations as $pattern => $config) {
 				if ($pattern === '*' || substr($pattern, -1) === '*' && strpos($category, rtrim($pattern, '*')) === 0) {
-					$source = $config;
+					if ($config instanceof MessageSource) {
-					break;
+						return $config;
+					} else {
+						return $this->translations[$category] = $this->translations[$pattern] = Yii::createObject($config);
 					}
 				}
 			}
-		if (isset($source)) {
-			return $source instanceof MessageSource ? $source : Yii::createObject($source);
-		} else {
-			throw new InvalidConfigException("Unable to locate message source for category '$category'.");
 		}
+
+		throw new InvalidConfigException("Unable to locate message source for category '$category'.");
 	}
 }

framework/yii/i18n/MessageSource.php

@@ -105,7 +105,7 @@ class MessageSource extends Component
 		}
 		if (isset($this->_messages[$key][$message]) && $this->_messages[$key][$message] !== '') {
 			return $this->_messages[$key][$message];
-		} elseif ($this->hasEventHandlers('missingTranslation')) {
+		} elseif ($this->hasEventHandlers(self::EVENT_MISSING_TRANSLATION)) {
 			$event = new MissingTranslationEvent([
 				'category' => $category,
 				'message' => $message,