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cakephp / 4.4 / class-cake.database.expression.unaryexpression.html

Class UnaryExpression

An expression object that represents an expression with only a single operand.

Namespace: Cake\Database\Expression

Constants

  • int
    POSTFIX 
    1

    Indicates that the operation is in post-order

  • int
    PREFIX 
    0

    Indicates that the operation is in pre-order

Property Summary

  • $_operator protected
    string

    The operator this unary expression represents

  • $_value protected
    mixed

    Holds the value which the unary expression operates

  • $position protected
    int

    Where to place the operator

Method Summary

  • __clone() public

    Perform a deep clone of the inner expression.

  • __construct() public

    Constructor

  • sql() public

    Converts the Node into a SQL string fragment.

  • traverse() public

    Iterates over each part of the expression recursively for every level of the expressions tree and executes the $callback callable passing as first parameter the instance of the expression currently being iterated.

Method Detail

__clone() public

__clone(): void

Perform a deep clone of the inner expression.

Returns

void

__construct() public

__construct(string $operator, mixed $value, int $position = self::PREFIX)

Constructor

Parameters

string $operator

The operator to used for the expression

mixed $value

the value to use as the operand for the expression

int $position optional

either UnaryExpression::PREFIX or UnaryExpression::POSTFIX

sql() public

sql(Cake\Database\ValueBinder $binder): string

Converts the Node into a SQL string fragment.

Parameters

Cake\Database\ValueBinder $binder

Returns

string

traverse() public

traverse(Closure $callback): $this

Iterates over each part of the expression recursively for every level of the expressions tree and executes the $callback callable passing as first parameter the instance of the expression currently being iterated.

Parameters

Closure $callback

Returns

$this

Property Detail

$_operator protected

The operator this unary expression represents

Type

string

$_value protected

Holds the value which the unary expression operates

Type

mixed

$position protected

Where to place the operator

Type

int

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https://api.cakephp.org/4.4/class-Cake.Database.Expression.UnaryExpression.html