What is model yii?

What is model yii?

Advertisements. Models are objects representing business logic and rules. To create a model, you should extend the yii\base\Model class or its subclasses.

How to connect yii with database?

To access a database, you first need to connect to it by creating an instance of yii\db\Connection: $db = new yii\db\Connection([ ‘dsn’ => ‘mysql:host=localhost;dbname=example’, ‘username’ => ‘root’, ‘password’ => ”, ‘charset’ => ‘utf8’, ]);

What is yii Active Record?

Active Record automatically maintains the list of dirty attributes. It does so by maintaining an older version of the attribute values and comparing them with the latest one. You can call yii\db\ActiveRecord::getDirtyAttributes() to get the attributes that are currently dirty.

How does yii Framework work?

5. Using Yii in praxis

1. 5.1. Create demo project and set it up.
2. Create Database for your project. Very important thing is database.
3. DB design tool.
4. Run Yiic shell or Gii.
5. Define relations in models manually.

How do I open a GII file?

To open the gii generation tool, type http://localhost:8080/index.php?r=gii: in the address bar of the web browser.

What is scenario in Yii2?

A model uses the yii\base\Model::$scenario property for the ‘Scenario’ concept. By default, a model supports only a single scenario named default. Yii2. 0 framework model is designed in very comfortable way for dynamic logic based on scenario.

What is Dao in MySQL?

Data Access Objects (DAO) Establishing Database Connection. Using ODBC Connection.

Can’t connect to database Sqlstate hy000 2002 Connection Refused?

The database connection can fail due to reasons like wrong database details in the configuration file, port restrictions on the server, missing files, lack of resources on the server and so on. In simple terms, MySQL error 2002 denotes a problem of connection between the website code and the database.

What is active record in PHP?

Active record is an approach to access data in a database. A database table or view is wrapped into a class, thus an object instance is tied to a single row in the table. After creation of an object, a new row is added to the table upon save.

How do you pronounce Yii Framework?

If notability cannot be shown, the article is likely to be merged, redirected, or deleted. Yii is an open source, object-oriented, component-based MVC PHP web application framework. Yii is pronounced as “Yee” or [ji:] and in Chinese it means “simple and evolutionary” and it can be an acronym for “Yes It Is!”.

How to create a model in Yii?

To create a model, you should extend the yii\\base\\Model class or its subclasses. Attributes represent the business data. They can be accessed like array elements or object properties. Each attribute is a publicly accessible property of a model.

How do I build a Yii\\db\\QUERY object?

To build a yii\\db\\Query object, you call different query building methods to specify different parts of a SQL query. The names of these methods resemble the SQL keywords used in the corresponding parts of the SQL statement.

Why does Yii\\base\\model::scenarios() Return a list of all scenarios and attributes?

Because the default implementation of yii\\base\\Model::scenarios () will return all scenarios and attributes found in yii\\base\\Model::rules (), if you do not override this method, it means an attribute is safe as long as it appears in one of the active validation rules.

How to get the label of an attribute in yiibasemodel?

You can get the label of an attribute by calling yiibaseModel::getAttributeLabel ().