Fixes #5175. [skip ci]

docs/guide/structure-models.md

@@ -301,7 +301,7 @@ is associated with one or multiple active rules declared in `rules()`.
 ## Massive Assignment <a name="massive-assignment"></a>
 
 Massive assignment is a convenient way of populating a model with user inputs using a single line of code.
-It populates the attributes of a model by assigning the input data directly to the [[yii\base\Model::attributes]]
+It populates the attributes of a model by assigning the input data directly to the [[yii\base\Model::$attributes]]
 property. The following two pieces of code are equivalent, both trying to assign the form data submitted by end users
 to the attributes of the `ContactForm` model. Clearly, the former, which uses massive assignment, is much cleaner
 and less error prone than the latter:
@@ -395,7 +395,7 @@ In the first step, models are converted into arrays; in the second step, the arr
 target formats. You may just focus on the first step, because the second step can be achieved by generic
 data formatters, such as [[yii\web\JsonResponseFormatter]].
 
-The simplest way of converting a model into an array is to use the [[yii\base\Model::attributes]] property.
+The simplest way of converting a model into an array is to use the [[yii\base\Model::$attributes]] property.
 For example,
 
 ```php
@@ -403,11 +403,11 @@ $post = \app\models\Post::findOne(100);
 $array = $post->attributes;
 ```
 
-By default, the [[yii\base\Model::attributes]] property will return the values of *all* attributes
+By default, the [[yii\base\Model::$attributes]] property will return the values of *all* attributes
 declared in [[yii\base\Model::attributes()]].
 
 A more flexible and powerful way of converting a model into an array is to use the [[yii\base\Model::toArray()]]
-method. Its default behavior is the same as that of [[yii\base\Model::attributes]]. However, it allows you
+method. Its default behavior is the same as that of [[yii\base\Model::$attributes]]. However, it allows you
 to choose which data items, called *fields*, to be put in the resulting array and how they should be formatted.
 In fact, it is the default way of exporting models in RESTful Web service development, as described in
 the [Response Formatting](rest-response-formatting.md).