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Showing content from https://www.yiiframework.com/doc/api/2.0/yii-db-columnschema below:

ColumnSchema, yii\db\ColumnSchema | API Documentation for Yii 2.0

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

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Whether this column can be null.

Whether this column is auto-incremental

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

Default value of this column

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

Whether this column is a primary key

Name of this column (without quotes).

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

Precision of the column data, if it is numeric.

Scale of the column data, if it is numeric.

Display size of the column.

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.

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

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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.

Source code

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

            

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.

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

Source code

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

            

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().

Source code

                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);
}

            

The property name or the event name

Whether the named property is set (not null).

Source code

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

            

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().

Source code

                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);
    }
}

            

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.

Source code

                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);
    }
}

            

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().

Source code

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

            

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().

The property name

Whether to treat member variables as properties

Whether the property can be written

Source code

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

            

Deprecated since 2.0.14. On PHP >=5.5, use ::class instead.

Source code

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

            

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.

Input value

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

Source code

                public function dbTypecast($value)
{
    
    
    return $this->typecast($value);
}

            

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().

Source code

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

            

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:

• canGetProperty()
• canSetProperty()

The property name

Whether to treat member variables as properties

Whether the property is defined

Source code

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

            

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.

Source code

                public function init()
{
}

            

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.

Input value

Converted value

Source code

                public function phpTypecast($value)
{
    return $this->typecast($value);
}

            

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.

Input value

Converted value

Source code

                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)) {
                
                return StringHelper::floatToString($value);
            }
            if (
                is_numeric($value)
                && ColumnSchemaBuilder::CATEGORY_NUMERIC === ColumnSchemaBuilder::$typeCategoryMap[$this->type]
            ) {
                
                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':
            
            
            return (bool) $value && $value !== "\0" && strtolower($value) !== 'false';
        case 'double':
            return (float) $value;
    }
    return $value;
}

            

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