Active Record implements the [Active Record design pattern](http://en.wikipedia.org/wiki/Active_record).
The premise behind Active Record is that an individual [[ActiveRecord]] object is associated with a specific row in a database table. The object's attributes are mapped to the columns of the corresponding table. Referencing an Active Record attribute is equivalent to accessing
the corresponding table column for that record.
the corresponding table column for that record.
As an example, say that the `Customer` ActiveRecord class is associated with the
`tbl_customer` table. This would mean that the class's `name` attribute is automatically mapped to the `name` column in `tbl_customer`.
Authentication is the act of verifying who a user is, and is the basis of the login process. Typically, authentication uses an identifier--a username or email address--and password, submitted through a form. The application then compares this information against that previously stored.
In Yii all this is done semi-automatically, leaving the developer to merely implement [[\yii\web\IdentityInterface]]. Typically, implementation is accomplished using the `User` model. You can find a full featured example in the
In Yii all this is done semi-automatically, leaving the developer to merely implement [[\yii\web\IdentityInterface]]. Typically, implementation is accomplished using the `User` model. You can find a full featured example in the
[advanced application template](installation.md). Below only the interface methods are listed:
All of the details can be found in the guide, but you'll either download Composer directly from [http://getcomposer.org/](http://getcomposer.org/), or run the following command:
Attribute labels are mainly used for display purpose. For example, given an attribute `firstName`, we can declare
a label `First Name` that is more user-friendly when displayed to end users in places such as form labels and
a label `First Name` that is more user-friendly when displayed to end users in places such as form labels and
error messages. Given an attribute name, you can obtain its label by calling [[\yii\base\Model::getAttributeLabel()]].
To declare attribute labels, override the [[\yii\base\Model::attributeLabels()]] method. The overridden method returns a mapping of attribute names to attribute labels, as shown in the example below. If an attribute is not found
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@@ -86,7 +86,7 @@ Scenarios
---------
A model may be used in different *scenarios*. For example, a `User` model may be used to collect user login inputs,
but it may also be used for user registration purposes. In the one scenario, every piece of data is required; in the other, only the username and password would be.
but it may also be used for user registration purposes. In the one scenario, every piece of data is required; in the other, only the username and password would be.
To easily implement the business logic for different scenarios, each model has a property named `scenario`
that stores the name of the scenario that the model is currently being used in. As will be explained in the next
Yii implements the model-view-controller (MVC) design pattern, which is
widely adopted in web and other application programming. MVC aims to separate business logic from
user interface considerations, allowing developers to more easily change individual components of an application without affecting, or even touching, another.
user interface considerations, allowing developers to more easily change individual components of an application without affecting, or even touching, another.
In MVC, the *model* represents the
information (the data) and the business rules to which the data must adhere. The *view* contains elements
Good security is vital to the health and success of many websites. Unfortunately, many developers may cut corners when it comes to security due to a lack of understanding or too large of an implementation hurdle. To make your Yii-based site as secure as possible, the Yii framework has baked in several excellent, and easy to use, security features.
Good security is vital to the health and success of many websites. Unfortunately, many developers may cut corners when it comes to security due to a lack of understanding or too large of an implementation hurdle. To make your Yii-based site as secure as possible, the Yii framework has baked in several excellent, and easy to use, security features.
