PHP Class atk4\data\Field_SQL_Expression

Inheritance: extends Field_SQL, use trait atk4\core\InitializerTrait
Show file Open project: atk4/data

Public Properties

Property Type Description
$expr mixed Used expression.
$read_only boolean Expressions are always read_only.

Public Methods

Method Description
_init ( )
getDSQLExpression ( atk\dsql\Expression $expression ) : atk\dsql\Expression When field is used as expression, this method will be called.
init ( ) Initialization.
useAlias ( ) : boolean Should this field use alias? Expression fields always need alias.

Method Details

_init() public method

public _init ( )

getDSQLExpression() public method

When field is used as expression, this method will be called.
public getDSQLExpression ( atk\dsql\Expression $expression ) : atk\dsql\Expression
$expression atk\dsql\Expression
return atk\dsql\Expression

init() public method

Initialization.
public init ( )

useAlias() public method

Should this field use alias? Expression fields always need alias.
public useAlias ( ) : boolean
return boolean

Property Details

$expr public property

Used expression.
public mixed $expr
return mixed

$read_only public property

Expressions are always read_only.
public bool $read_only
return boolean