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Class yii\db\ColumnSchema

All Classes | Properties | Methods
Inheritanceyii\db\ColumnSchema » yii\base\BaseObject
Implementsyii\base\Configurable
Subclassesyii\db\mssql\ColumnSchema, yii\db\mysql\ColumnSchema, yii\db\pgsql\ColumnSchema
Available since version2.0
Source Code https://github.com/yiisoft/yii2/blob/master/framework/db/ColumnSchema.php

ColumnSchema class describes the metadata of a column in a database table.

Public Properties

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Property Type Description Defined By
$allowNull boolean Whether this column can be null. yii\db\ColumnSchema
$autoIncrement boolean Whether this column is auto-incremental yii\db\ColumnSchema
$comment string Comment of this column. yii\db\ColumnSchema
$dbType string The DB type of this column. yii\db\ColumnSchema
$defaultValue mixed Default value of this column yii\db\ColumnSchema
$enumValues array Enumerable values. yii\db\ColumnSchema
$isPrimaryKey boolean Whether this column is a primary key yii\db\ColumnSchema
$name string Name of this column (without quotes). yii\db\ColumnSchema
$phpType string The PHP type of this column. yii\db\ColumnSchema
$precision integer Precision of the column data, if it is numeric. yii\db\ColumnSchema
$scale integer Scale of the column data, if it is numeric. yii\db\ColumnSchema
$size integer Display size of the column. yii\db\ColumnSchema
$type string Abstract type of this column. yii\db\ColumnSchema
$unsigned boolean Whether this column is unsigned. yii\db\ColumnSchema

Public Methods

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Method Description Defined By
__call() Calls the named method which is not a class method. yii\base\BaseObject
__construct() Constructor. yii\base\BaseObject
__get() Returns the value of an object property. yii\base\BaseObject
__isset() Checks if a property is set, i.e. defined and not null. yii\base\BaseObject
__set() Sets value of an object property. yii\base\BaseObject
__unset() Sets an object property to null. yii\base\BaseObject
canGetProperty() Returns a value indicating whether a property can be read. yii\base\BaseObject
canSetProperty() Returns a value indicating whether a property can be set. yii\base\BaseObject
className() Returns the fully qualified name of this class. yii\base\BaseObject
dbTypecast() Converts the input value according to $type and $dbType for use in a db query. yii\db\ColumnSchema
hasMethod() Returns a value indicating whether a method is defined. yii\base\BaseObject
hasProperty() Returns a value indicating whether a property is defined. yii\base\BaseObject
init() Initializes the object. yii\base\BaseObject
phpTypecast() Converts the input value according to $phpType after retrieval from the database. yii\db\ColumnSchema

Protected Methods

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Method Description Defined By
typecast() Converts the input value according to $phpType after retrieval from the database. yii\db\ColumnSchema

Property Details

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$allowNull public property

Whether this column can be null.

public boolean $allowNull = null
$autoIncrement public property

Whether this column is auto-incremental

public boolean $autoIncrement = false
$comment public property

Comment of this column. Not all DBMS support this.

public string $comment = null
$dbType public property

The DB type of this column. Possible DB types vary according to the type of DBMS.

public string $dbType = null
$defaultValue public property

Default value of this column

public mixed $defaultValue = null
$enumValues public property

Enumerable values. This is set only if the column is declared to be an enumerable type.

public array $enumValues = null
$isPrimaryKey public property

Whether this column is a primary key

public boolean $isPrimaryKey = null
$name public property

Name of this column (without quotes).

public string $name = null
$phpType public property

The PHP type of this column. Possible PHP types include: string, boolean, integer, double, array.

public string $phpType = null
$precision public property

Precision of the column data, if it is numeric.

public integer $precision = null
$scale public property

Scale of the column data, if it is numeric.

public integer $scale = null
$size public property

Display size of the column.

public integer $size = null
$type public property

Abstract type of this column. Possible abstract types include: char, string, text, boolean, smallint, integer, bigint, float, decimal, datetime, timestamp, time, date, binary, and money.

public string $type = null
$unsigned public property

Whether this column is unsigned. This is only meaningful when $type is smallint, integer or bigint.

public boolean $unsigned = null

Method Details

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__call() public method

Defined in: yii\base\BaseObject::__call()

Calls the named method which is not a class method.

Do not call this method directly as it is a PHP magic method that will be implicitly called when an unknown method is being invoked.

public mixed __call ( $name, $params )
$name string

The method name
$params array

Method parameters
return mixed

The method return value
throws yii\base\UnknownMethodException

when calling unknown method

 

                public function __call($name, $params)
{
    throw new UnknownMethodException('Calling unknown method: ' . get_class($this) . "::$name()");
}
__construct() public method

Defined in: yii\base\BaseObject::__construct()

Constructor.

The default implementation does two things:

  • Initializes the object with the given configuration $config.
  • Call init().

If this method is overridden in a child class, it is recommended that

  • the last parameter of the constructor is a configuration array, like $config here.
  • call the parent implementation at the end of the constructor.
public void __construct ( $config = [] )
$config array

Name-value pairs that will be used to initialize the object properties

 

                public function __construct($config = [])
{
    if (!empty($config)) {
        Yii::configure($this, $config);
    }
    $this->init();
}
__get() public method

Defined in: yii\base\BaseObject::__get()

Returns the value of an object property.

Do not call this method directly as it is a PHP magic method that will be implicitly called when executing $value = $object->property;.

See also __set().

public mixed __get ( $name )
$name string

The property name
return mixed

The property value
throws yii\base\UnknownPropertyException

if the property is not defined
throws yii\base\InvalidCallException

if the property is write-only

 

                public function __get($name)
{
    $getter = 'get' . $name;
    if (method_exists($this, $getter)) {
        return $this->$getter();
    } elseif (method_exists($this, 'set' . $name)) {
        throw new InvalidCallException('Getting write-only property: ' . get_class($this) . '::' . $name);
    }
    throw new UnknownPropertyException('Getting unknown property: ' . get_class($this) . '::' . $name);
}
__isset() public method

Defined in: yii\base\BaseObject::__isset()

Checks if a property is set, i.e. defined and not null.

Do not call this method directly as it is a PHP magic method that will be implicitly called when executing isset($object->property).

Note that if the property is not defined, false will be returned.

See also https://www.php.net/manual/en/function.isset.php.

public boolean __isset ( $name )
$name string

The property name or the event name
return boolean

Whether the named property is set (not null).

 

                public function __isset($name)
{
    $getter = 'get' . $name;
    if (method_exists($this, $getter)) {
        return $this->$getter() !== null;
    }
    return false;
}
__set() public method

Defined in: yii\base\BaseObject::__set()

Sets value of an object property.

Do not call this method directly as it is a PHP magic method that will be implicitly called when executing $object->property = $value;.

See also __get().

public void __set ( $name, $value )
$name string

The property name or the event name
$value mixed

The property value
throws yii\base\UnknownPropertyException

if the property is not defined
throws yii\base\InvalidCallException

if the property is read-only

 

                public function __set($name, $value)
{
    $setter = 'set' . $name;
    if (method_exists($this, $setter)) {
        $this->$setter($value);
    } elseif (method_exists($this, 'get' . $name)) {
        throw new InvalidCallException('Setting read-only property: ' . get_class($this) . '::' . $name);
    } else {
        throw new UnknownPropertyException('Setting unknown property: ' . get_class($this) . '::' . $name);
    }
}
__unset() public method

Defined in: yii\base\BaseObject::__unset()

Sets an object property to null.

Do not call this method directly as it is a PHP magic method that will be implicitly called when executing unset($object->property).

Note that if the property is not defined, this method will do nothing. If the property is read-only, it will throw an exception.

See also https://www.php.net/manual/en/function.unset.php.

public void __unset ( $name )
$name string

The property name
throws yii\base\InvalidCallException

if the property is read only.

 

                public function __unset($name)
{
    $setter = 'set' . $name;
    if (method_exists($this, $setter)) {
        $this->$setter(null);
    } elseif (method_exists($this, 'get' . $name)) {
        throw new InvalidCallException('Unsetting read-only property: ' . get_class($this) . '::' . $name);
    }
}
canGetProperty() public method

Defined in: yii\base\BaseObject::canGetProperty()

Returns a value indicating whether a property can be read.

A property is readable if:

  • the class has a getter method associated with the specified name (in this case, property name is case-insensitive);
  • the class has a member variable with the specified name (when $checkVars is true);

See also canSetProperty().

public boolean canGetProperty ( $name, $checkVars = true )
$name string

The property name
$checkVars boolean

Whether to treat member variables as properties
return boolean

Whether the property can be read

 

                public function canGetProperty($name, $checkVars = true)
{
    return method_exists($this, 'get' . $name) || $checkVars && property_exists($this, $name);
}
canSetProperty() public method

Defined in: yii\base\BaseObject::canSetProperty()

Returns a value indicating whether a property can be set.

A property is writable if:

  • the class has a setter method associated with the specified name (in this case, property name is case-insensitive);
  • the class has a member variable with the specified name (when $checkVars is true);

See also canGetProperty().

public boolean canSetProperty ( $name, $checkVars = true )
$name string

The property name
$checkVars boolean

Whether to treat member variables as properties
return boolean

Whether the property can be written

 

                public function canSetProperty($name, $checkVars = true)
{
    return method_exists($this, 'set' . $name) || $checkVars && property_exists($this, $name);
}
className() public static method
Deprecated since 2.0.14. On PHP >=5.5, use ::class instead.

Defined in: yii\base\BaseObject::className()

Returns the fully qualified name of this class.

public static string className ( )
return string

The fully qualified name of this class.

 

                public static function className()
{
    return get_called_class();
}
dbTypecast() public method

Converts the input value according to $type and $dbType for use in a db query.

If the value is null or an yii\db\Expression, it will not be converted.

public mixed dbTypecast ( $value )
$value mixed

Input value
return mixed

Converted value. This may also be an array containing the value as the first element and the PDO type as the second element.

 

                public function dbTypecast($value)
{
    // the default implementation does the same as casting for PHP, but it should be possible
    // to override this with annotation of explicit PDO type.
    return $this->typecast($value);
}
hasMethod() public method

Defined in: yii\base\BaseObject::hasMethod()

Returns a value indicating whether a method is defined.

The default implementation is a call to php function method_exists(). You may override this method when you implemented the php magic method __call().

public boolean hasMethod ( $name )
$name string

The method name
return boolean

Whether the method is defined

 

                public function hasMethod($name)
{
    return method_exists($this, $name);
}
hasProperty() public method

Defined in: yii\base\BaseObject::hasProperty()

Returns a value indicating whether a property is defined.

A property is defined if:

  • the class has a getter or setter method associated with the specified name (in this case, property name is case-insensitive);
  • the class has a member variable with the specified name (when $checkVars is true);

See also:

public boolean hasProperty ( $name, $checkVars = true )
$name string

The property name
$checkVars boolean

Whether to treat member variables as properties
return boolean

Whether the property is defined

 

                public function hasProperty($name, $checkVars = true)
{
    return $this->canGetProperty($name, $checkVars) || $this->canSetProperty($name, false);
}
init() public method

Defined in: yii\base\BaseObject::init()

Initializes the object.

This method is invoked at the end of the constructor after the object is initialized with the given configuration.

public void init ( )

                public function init()
{
}
phpTypecast() public method

Converts the input value according to $phpType after retrieval from the database.

If the value is null or an yii\db\Expression, it will not be converted.

public mixed phpTypecast ( $value )
$value mixed

Input value
return mixed

Converted value

 

                public function phpTypecast($value)
{
    return $this->typecast($value);
}
typecast() protected method (available since version 2.0.3)

Converts the input value according to $phpType after retrieval from the database.

If the value is null or an yii\db\Expression, it will not be converted.

protected mixed typecast ( $value )
$value mixed

Input value
return mixed

Converted value

 

                protected function typecast($value)
{
    if (
        $value === ''
        && !in_array(
            $this->type,
            [
                Schema::TYPE_TEXT,
                Schema::TYPE_STRING,
                Schema::TYPE_BINARY,
                Schema::TYPE_CHAR
            ],
            true
        )
    ) {
        return null;
    }
    if (
        $value === null
        || gettype($value) === $this->phpType
        || $value instanceof ExpressionInterface
        || $value instanceof Query
    ) {
        return $value;
    }
    if (
        is_array($value)
        && count($value) === 2
        && isset($value[1])
        && in_array($value[1], $this->getPdoParamTypes(), true)
    ) {
        return new PdoValue($value[0], $value[1]);
    }
    switch ($this->phpType) {
        case 'resource':
        case 'string':
            if (is_resource($value)) {
                return $value;
            }
            if (is_float($value)) {
                // ensure type cast always has . as decimal separator in all locales
                return StringHelper::floatToString($value);
            }
            if (
                is_numeric($value)
                && ColumnSchemaBuilder::CATEGORY_NUMERIC === ColumnSchemaBuilder::$typeCategoryMap[$this->type]
            ) {
                // https://github.com/yiisoft/yii2/issues/14663
                return $value;
            }
            if (PHP_VERSION_ID >= 80100 && is_object($value) && $value instanceof \BackedEnum) {
                return (string) $value->value;
            }
            return (string) $value;
        case 'integer':
            if (PHP_VERSION_ID >= 80100 && is_object($value) && $value instanceof \BackedEnum) {
                return (int) $value->value;
            }
            return (int) $value;
        case 'boolean':
            // treating a 0 bit value as false too
            // https://github.com/yiisoft/yii2/issues/9006
            return (bool) $value && $value !== "\0" && strtolower($value) !== 'false';
        case 'double':
            return (float) $value;
    }
    return $value;
}