Fixes #4502: Added alias support to URL route when calling `Url::toRoute()` and `Url::to()`

docs/guide/helper-html.md

@@ -10,14 +10,13 @@ of Html helper which provides a set of static methods for handling commonly used
   with Html helper calls.
 
 
-Basics <a name="basics"></a>
-----------------------------
+## Basics <a name="basics"></a>
 
 Since building dynamic HTML by string concatenation is getting messy very fast, Yii provides a set of methods to
 manipulate tag options and build tags based on these options.
 
 
-### Generating tags
+### Generating Tags <a name="generating-tags"></a>
 
 The code generating a tag looks like the following:
 
@@ -51,7 +50,8 @@ know about:
   `'data' => ['params' => ['id' => 1, 'name' => 'yii'], 'status' => 'ok']` becomes
   `data-params='{"id":1,"name":"yii"}' data-status="ok"`.
 
-### Forming class and style dynamically
+
+### Forming CSS Classes and Styles <a name="forming-css"></a>
 
 When building options for HTML tag we're often starting with defaults which we need to modify. In order to add or
 remove CSS class you can use the following:
@@ -89,8 +89,7 @@ could be converted there and forth by using [[yii\helpers\Html::cssStyleFromArra
 method accepts an array of properties to remove. If it's going to be a single property it could be specified as string.
 
 
-Encoding and decoding content <a name="encoding-and-decoding-content"></a>
---------------------------------------------------------------------------
+### Encoding and Decoding Content <a name="encoding-and-decoding-content"></a>
 
 In order for content to be displayed properly and securely in HTML special characters in the content should be encoded.
 In PHP it's done with [htmlspecialchars](http://www.php.net/manual/en/function.htmlspecialchars.php) and
@@ -107,8 +106,7 @@ $decodedUserName = Html::decode($userName);
 ```
 
 
-Forms
------
+## Forms <a name="forms"></a>
 
 Dealing with forms markup is quite repetitive and error prone. Because of that there is a group of methods to help
 dealing with them.
@@ -116,7 +114,7 @@ dealing with them.
 > Note: consider using [[yii\widgets\ActiveForm|ActiveForm]] in case you deal with models and need validation.
 
 
-### Open and close a form
+### Creating Forms <a name="creating-forms"></a>
 
 Form could be opened with [[yii\helpers\Html::beginForm()|beginForm()]] method like the following:
 
@@ -136,7 +134,7 @@ Closing form tag is simple:
 ```
 
 
-### Buttons
+### Buttons <a name="buttons"></a>
 
 In order to generate buttons you can use the following code:
 
@@ -150,7 +148,7 @@ First argument for all three methods is button title and the second one is optio
 getting data from end user, encode it with [[yii\helpers\Html::encode()|Html::encode()]].
 
 
-### Inputs
+### Input Fields <a name="input-fields"></a>
 
 There are two groups on input methods. The ones starting with `active` and called active inputs and the ones not starting
 with it. Active inputs are taking data from model and attribute specified while in case of regular input data is specified
@@ -215,7 +213,7 @@ If not, use radio list:
 ```
 
 
-### Labels and errors
+### Labels and Errors <a name="labels-and-errors"></a>
 
 Same as inputs there are two methods for generating form labels. Active that's taking data from the model and non-active
 that accepts data directly:
@@ -238,7 +236,7 @@ To display individual error:
 ```
 
 
-### Names and values
+### Input Names and Values <a name="input-names-and-values"></a>
 
 There are methods to get names, ids and values for input fields based on the model. These are mainly used internally
 but could be handy sometimes:
@@ -273,8 +271,7 @@ echo Html::getAttributeName('dates[0]');
 ```
 
 
-Styles and scripts
-------------------
+## Styles and Scripts <a name="styles-and-scripts"></a>
 
 There two methods to generate tags wrapping embedded styles and scripts:
 
@@ -322,8 +319,7 @@ Same as with CSS first argument specifies link to the file to be included. Optio
 In options you can specify `condition` in the same way as in options for `cssFile`.
 
 
-Links
------
+## Hyperlinks <a name="hyperlinks"></a>
 
 There's a method to generate hyperlink conveniently:
 
@@ -342,8 +338,7 @@ In you need to generate `mailto` link you can use the following code:
 ```
 
 
-Images
-------
+## Images <a name="images"></a>
 
 In order to generate image tag use the following:
 
@@ -359,8 +354,7 @@ Aside [aliases](concept-aliases.md) the first argument can accept routes, parame
 [Url::to()](helper-url.md) does.
 
 
-Lists
------
+## Lists <a name="lists"></a>
 
 Unordered list could be generated like the following:
 

docs/guide/helper-url.md

@@ -4,11 +4,10 @@ Url Helper
 Url helper provides a set of static methods for managing URLs.
 
 
-Getting common URLs
--------------------
+## Getting Common URLs <a name="getting-common-urls"></a>
 
 There are two methods you can use to get common URLs: home URL and base URL of the current request. In order to get
-home URL use the follwing:
+home URL use the following:
 
 ```php
 $relativeHomeUrl = Url::home();
@@ -29,8 +28,8 @@ $httpsAbsoluteBaseUrl = Url::base('https');
 
 The only parameter of the method works exactly the same as for `Url::home()`.
 
-Creating URLs
--------------
+
+## Creating URLs <a name="creating-urls"></a>
 
 In order to create URL to a given route use `Url::toRoute()` method. The method uses [[\yii\web\UrlManager]] to create
 a URL:
@@ -62,6 +61,10 @@ route has none (e.g. `site/index` or `index`). A relative route will be converte
   and will be prepended with [[\yii\web\Controller::uniqueId]];
 - If the route has no leading slash (e.g. `site/index`), it is considered to be a route relative to the current module
   and will be prepended with the module's [[\yii\base\Module::uniqueId|uniqueId]].
+  
+Starting from version 2.0.2, you may specify a route in terms of an [alias](concept-aliases.md). If this is the case,
+the alias will first be converted into the actual route which will then be turned into an absolute route according
+to the above rules.
 
 Below are some examples of using this method:
 
@@ -72,6 +75,9 @@ echo Url::toRoute('site/index');
 // /index?r=site/index&src=ref1#name
 echo Url::toRoute(['site/index', 'src' => 'ref1', '#' => 'name']);
 
+// /index?r=post/edit&id=100     assume the alias "@postEdit" is defined as "post/edit"
+echo Url::toRoute(['@postEdit', 'id' => 100]);
+
 // http://www.example.com/index.php?r=site/index
 echo Url::toRoute('site/index', true);
 
@@ -105,6 +111,9 @@ echo Url::to(['site/index']);
 // /index?r=site/index&src=ref1#name
 echo Url::to(['site/index', 'src' => 'ref1', '#' => 'name']);
 
+// /index?r=post/edit&id=100     assume the alias "@postEdit" is defined as "post/edit"
+echo Url::to(['@postEdit', 'id' => 100]);
+
 // the currently requested URL
 echo Url::to();
 
@@ -121,8 +130,7 @@ echo Url::to('@web/images/logo.gif', true);
 echo Url::to('@web/images/logo.gif', 'https');
 ```
 
-Remember URL for future use
----------------------------
+## Remember URLs <a name="remember-urls"></a>
 
 There are cases when you need to remember URL and afterwards use it during processing of the one of sequential requests.
 It can be achieved in the following way:
@@ -145,8 +153,7 @@ $url = Url::previous();
 $productUrl = Url::previous('product');
 ```
                         
-Finding out if URL is relative
-------------------------------
+## Checking Relative URLs <a name="checking-relative-urls"></a>
 
 To find out if URL is relative i.e. it doesn't have host info part, you can use the following code:
                              

framework/CHANGELOG.md

@@ -9,6 +9,7 @@ Yii Framework 2 Change Log
 - Bug #6557: Link URLs generated by `yii\widgets\Menu` are not encoded (qiangxue)
 - Bug #6632: `yii\di\Container::get()` did not handle config parameter correctly when it is passed as a constructor parameter (qiangxue)
 - Bug #6648: Added explicit type casting to avoid dblib issues on SQL Server 2014 (o-rey)
+- Enh #4502: Added alias support to URL route when calling `Url::toRoute()` and `Url::to()` (qiangxue, lynicidn)
 - Enh #6247: Logger and error handler are now using slightly less memory (stepanselyuk, samdark)
 - Enh #6434: Added `yii\behaviors\SluggableBehavior::immutable` to support keeping the generated slug unchanged (trntv)
 - Enh #6467: `ActiveForm` will scroll to the nearest visible element when the first error input is hidden (newartix)

framework/helpers/BaseUrl.php

@@ -103,13 +103,16 @@ class BaseUrl
      * - If the route has no leading slash, it is considered to be a route relative
      *   to the current module and will be prepended with the module's uniqueId.
      *
+     * Starting from version 2.0.2, a route can also be specified as an alias. In this case, the alias
+     * will be converted into the actual route first before conducting the above transformation steps.
+     *
      * @param string $route the route. This can be either an absolute route or a relative route.
      * @return string normalized route suitable for UrlManager
      * @throws InvalidParamException a relative route is given while there is no active controller
      */
     protected static function normalizeRoute($route)
     {
-        $route = (string) $route;
+        $route = Yii::getAlias((string) $route);
         if (strncmp($route, '/', 1) === 0) {
             // absolute route
             return ltrim($route, '/');

tests/unit/framework/helpers/UrlTest.php

@@ -82,6 +82,11 @@ class UrlTest extends TestCase
         $this->assertEquals('http://example.com/base/index.php?r=stats%2Fuser%2Fview&id=42', Url::toRoute(['user/view', 'id' => 42], true));
         $this->assertEquals('https://example.com/base/index.php?r=stats%2Fuser%2Fview&id=42', Url::toRoute(['user/view', 'id' => 42], 'https'));
 
+        // alias support
+        \Yii::setAlias('@userView', 'user/view');
+        $this->assertEquals('/base/index.php?r=stats%2Fuser%2Fview', Url::toRoute('@userView'));
+        \Yii::setAlias('@userView', null);
+
         // In case there is no controller, an exception should be thrown for relative route
         $this->removeMockedAction();
 
@@ -98,6 +103,11 @@ class UrlTest extends TestCase
         $this->assertEquals('/base/index.php?r=page%2Fedit', Url::to(['edit']));
         $this->assertEquals('/base/index.php?r=page%2Fview', Url::to(['']));
 
+        // alias support
+        \Yii::setAlias('@pageEdit', 'edit');
+        $this->assertEquals('/base/index.php?r=page%2Fedit&id=20', Url::to(['@pageEdit', 'id' => 20]));
+        \Yii::setAlias('@pageEdit', null);
+
         $this->assertEquals('http://example.com/base/index.php?r=page%2Fedit&id=20', Url::to(['edit', 'id' => 20], true));
         $this->assertEquals('http://example.com/base/index.php?r=page%2Fedit', Url::to(['edit'], true));
         $this->assertEquals('http://example.com/base/index.php?r=page%2Fview', Url::to([''], true));