Class yii\db\ColumnSchemaBuilder

All Classes | Properties | Methods | Constants

Inheritance	yii\db\ColumnSchemaBuilder » yii\base\Object
Implements	yii\base\Configurable
Subclasses	yii\db\cubrid\ColumnSchemaBuilder, yii\db\mysql\ColumnSchemaBuilder, yii\db\oci\ColumnSchemaBuilder, yii\db\sqlite\ColumnSchemaBuilder
Available since version	2.0.6
Source Code	https://github.com/yiisoft/yii2/blob/master/framework/db/ColumnSchemaBuilder.php

ColumnSchemaBuilder helps to define database schema types using a PHP interface.

See yii\db\SchemaBuilderTrait for more detailed description and usage examples.

Public Properties

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Property	Type	Description	Defined By
$categoryMap	array	Mapping of abstract column types (keys) to type categories (values).	yii\db\ColumnSchemaBuilder
$comment	string	Comment value of the column.	yii\db\ColumnSchemaBuilder
$db	yii\db\Connection	The current database connection.	yii\db\ColumnSchemaBuilder

Protected Properties

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Property	Type	Description	Defined By
$after	string	The column after which this column will be added.	yii\db\ColumnSchemaBuilder
$append	mixed	SQL string to be appended to column schema definition.	yii\db\ColumnSchemaBuilder
$check	string	The `CHECK` constraint for the column.	yii\db\ColumnSchemaBuilder
$default	mixed	Default value of the column.	yii\db\ColumnSchemaBuilder
$isFirst	boolean	Whether this column is to be inserted at the beginning of the table.	yii\db\ColumnSchemaBuilder
$isNotNull	boolean\|null	Whether the column is or not nullable.	yii\db\ColumnSchemaBuilder
$isUnique	boolean	Whether the column values should be unique.	yii\db\ColumnSchemaBuilder
$isUnsigned	boolean	Whether the column values should be unsigned.	yii\db\ColumnSchemaBuilder
$length	integer\|string\|array	Column size or precision definition.	yii\db\ColumnSchemaBuilder
$type	string	The column type definition such as INTEGER, VARCHAR, DATETIME, etc.	yii\db\ColumnSchemaBuilder

Public Methods

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Method	Description	Defined By
__call()	Calls the named method which is not a class method.	yii\base\Object
__construct()	Create a column schema builder instance giving the type and value precision.	yii\db\ColumnSchemaBuilder
__get()	Returns the value of an object property.	yii\base\Object
__isset()	Checks if a property is set, i.e. defined and not null.	yii\base\Object
__set()	Sets value of an object property.	yii\base\Object
__toString()	Builds the full string for the column's schema	yii\db\ColumnSchemaBuilder
__unset()	Sets an object property to null.	yii\base\Object
after()	Adds an `AFTER` constraint to the column.	yii\db\ColumnSchemaBuilder
append()	Specify additional SQL to be appended to column definition.	yii\db\ColumnSchemaBuilder
canGetProperty()	Returns a value indicating whether a property can be read.	yii\base\Object
canSetProperty()	Returns a value indicating whether a property can be set.	yii\base\Object
check()	Sets a `CHECK` constraint for the column.	yii\db\ColumnSchemaBuilder
className()	Returns the fully qualified name of this class.	yii\base\Object
comment()	Specifies the comment for column.	yii\db\ColumnSchemaBuilder
defaultExpression()	Specify the default SQL expression for the column.	yii\db\ColumnSchemaBuilder
defaultValue()	Specify the default value for the column.	yii\db\ColumnSchemaBuilder
first()	Adds an `FIRST` constraint to the column.	yii\db\ColumnSchemaBuilder
hasMethod()	Returns a value indicating whether a method is defined.	yii\base\Object
hasProperty()	Returns a value indicating whether a property is defined.	yii\base\Object
init()	Initializes the object.	yii\base\Object
notNull()	Adds a `NOT NULL` constraint to the column.	yii\db\ColumnSchemaBuilder
null()	Adds a `NULL` constraint to the column	yii\db\ColumnSchemaBuilder
unique()	Adds a `UNIQUE` constraint to the column.	yii\db\ColumnSchemaBuilder
unsigned()	Marks column as unsigned.	yii\db\ColumnSchemaBuilder

Protected Methods

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Method	Description	Defined By
buildAfterString()	Builds the after constraint for the column. Defaults to unsupported.	yii\db\ColumnSchemaBuilder
buildAppendString()	Builds the custom string that's appended to column definition.	yii\db\ColumnSchemaBuilder
buildCheckString()	Builds the check constraint for the column.	yii\db\ColumnSchemaBuilder
buildCommentString()	Builds the comment specification for the column.	yii\db\ColumnSchemaBuilder
buildCompleteString()	Returns the complete column definition from input format	yii\db\ColumnSchemaBuilder
buildDefaultString()	Builds the default value specification for the column.	yii\db\ColumnSchemaBuilder
buildFirstString()	Builds the first constraint for the column. Defaults to unsupported.	yii\db\ColumnSchemaBuilder
buildLengthString()	Builds the length/precision part of the column.	yii\db\ColumnSchemaBuilder
buildNotNullString()	Builds the not null constraint for the column.	yii\db\ColumnSchemaBuilder
buildUniqueString()	Builds the unique constraint for the column.	yii\db\ColumnSchemaBuilder
buildUnsignedString()	Builds the unsigned string for column. Defaults to unsupported.	yii\db\ColumnSchemaBuilder
getTypeCategory()	Returns the category of the column type.	yii\db\ColumnSchemaBuilder

Constants

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Constant	Value	Defined By
CATEGORY_NUMERIC	'numeric'	yii\db\ColumnSchemaBuilder
CATEGORY_OTHER	'other'	yii\db\ColumnSchemaBuilder
CATEGORY_PK	'pk'	yii\db\ColumnSchemaBuilder
CATEGORY_STRING	'string'	yii\db\ColumnSchemaBuilder
CATEGORY_TIME	'time'	yii\db\ColumnSchemaBuilder

Property Details

$after protected property (available since version 2.0.8)

The column after which this column will be added.

protected string $after = null

$append protected property (available since version 2.0.9)

SQL string to be appended to column schema definition.

protected mixed $append = null

$categoryMap public property (available since version 2.0.8)

Mapping of abstract column types (keys) to type categories (values).

public array $categoryMap = [\yii\db\Schema::TYPE_PK => self::CATEGORY_PK, \yii\db\Schema::TYPE_UPK => self::CATEGORY_PK, \yii\db\Schema::TYPE_BIGPK => self::CATEGORY_PK, \yii\db\Schema::TYPE_UBIGPK => self::CATEGORY_PK, \yii\db\Schema::TYPE_CHAR => self::CATEGORY_STRING, \yii\db\Schema::TYPE_STRING => self::CATEGORY_STRING, \yii\db\Schema::TYPE_TEXT => self::CATEGORY_STRING, \yii\db\Schema::TYPE_SMALLINT => self::CATEGORY_NUMERIC, \yii\db\Schema::TYPE_INTEGER => self::CATEGORY_NUMERIC, \yii\db\Schema::TYPE_BIGINT => self::CATEGORY_NUMERIC, \yii\db\Schema::TYPE_FLOAT => self::CATEGORY_NUMERIC, \yii\db\Schema::TYPE_DOUBLE => self::CATEGORY_NUMERIC, \yii\db\Schema::TYPE_DECIMAL => self::CATEGORY_NUMERIC, \yii\db\Schema::TYPE_DATETIME => self::CATEGORY_TIME, \yii\db\Schema::TYPE_TIMESTAMP => self::CATEGORY_TIME, \yii\db\Schema::TYPE_TIME => self::CATEGORY_TIME, \yii\db\Schema::TYPE_DATE => self::CATEGORY_TIME, \yii\db\Schema::TYPE_BINARY => self::CATEGORY_OTHER, \yii\db\Schema::TYPE_BOOLEAN => self::CATEGORY_NUMERIC, \yii\db\Schema::TYPE_MONEY => self::CATEGORY_NUMERIC]

$check protected property

The CHECK constraint for the column.

protected string $check = null

$comment public property (available since version 2.0.8)

Comment value of the column.

public string $comment = null

$db public property (available since version 2.0.8)

The current database connection. It is used mainly to escape strings safely when building the final column schema string.

public yii\db\Connection $db = null

$default protected property

Default value of the column.

protected mixed $default = null

$isFirst protected property (available since version 2.0.8)

Whether this column is to be inserted at the beginning of the table.

protected boolean $isFirst = null

$isNotNull protected property

Whether the column is or not nullable. If this is true, a NOT NULL constraint will be added. If this is false, a NULL constraint will be added.

protected boolean|null $isNotNull = null

$isUnique protected property

Whether the column values should be unique. If this is true, a UNIQUE constraint will be added.

protected boolean $isUnique = false

$isUnsigned protected property (available since version 2.0.7)

Whether the column values should be unsigned. If this is true, an UNSIGNED keyword will be added.

protected boolean $isUnsigned = false

$length protected property

Column size or precision definition. This is what goes into the parenthesis after the column type. This can be either a string, an integer or an array. If it is an array, the array values will be joined into a string separated by comma.

protected integer|string|array $length = null

$type protected property

The column type definition such as INTEGER, VARCHAR, DATETIME, etc.

protected string $type = null

Method Details

__construct() public method

Create a column schema builder instance giving the type and value precision.

public void __construct ( $type, $length = null, $db = null, $config = [] )
$type	string	Type of the column. See $type.
$length	integer\|string\|array	Length or precision of the column. See $length.
$db	yii\db\Connection	The current database connection. See $db.
$config	array	Name-value pairs that will be used to initialize the object properties

__toString() public method

Builds the full string for the column's schema

public string __toString ( )

after() public method (available since version 2.0.8)

Adds an AFTER constraint to the column.

Note: MySQL, Oracle and Cubrid support only.

public $this after ( $after )
$after	string	The column after which $this column will be added.

append() public method (available since version 2.0.9)

Specify additional SQL to be appended to column definition.

Position modifiers will be appended after column definition in databases that support them.

public $this append ( $sql )
$sql	string	The SQL string to be appended.

buildAfterString() protected method (available since version 2.0.8)

Builds the after constraint for the column. Defaults to unsupported.

protected string buildAfterString ( )
return	string	A string containing the AFTER constraint.

buildAppendString() protected method (available since version 2.0.9)

Builds the custom string that's appended to column definition.

protected string buildAppendString ( )
return	string	Custom string to append.

buildCheckString() protected method

Builds the check constraint for the column.

protected string buildCheckString ( )
return	string	A string containing the CHECK constraint.

buildCommentString() protected method (available since version 2.0.8)

Builds the comment specification for the column.

protected string buildCommentString ( )
return	string	A string containing the COMMENT keyword and the comment itself

buildCompleteString() protected method (available since version 2.0.8)

Returns the complete column definition from input format

protected string buildCompleteString ( $format )
$format	string	The format of the definition.
return	string	A string containing the complete column definition.

buildDefaultString() protected method

Builds the default value specification for the column.

protected string buildDefaultString ( )
return	string	String with default value of column.

buildFirstString() protected method (available since version 2.0.8)

Builds the first constraint for the column. Defaults to unsupported.

protected string buildFirstString ( )
return	string	A string containing the FIRST constraint.

buildLengthString() protected method

Builds the length/precision part of the column.

protected string buildLengthString ( )

buildNotNullString() protected method

Builds the not null constraint for the column.

protected string buildNotNullString ( )
return	string	Returns 'NOT NULL' if $isNotNull is true, 'NULL' if $isNotNull is false or an empty string otherwise.

buildUniqueString() protected method

Builds the unique constraint for the column.

protected string buildUniqueString ( )
return	string	Returns string 'UNIQUE' if $isUnique is true, otherwise it returns an empty string.

buildUnsignedString() protected method (available since version 2.0.7)

Builds the unsigned string for column. Defaults to unsupported.

protected string buildUnsignedString ( )
return	string	A string containing UNSIGNED keyword.

check() public method

Sets a CHECK constraint for the column.

public $this check ( $check )
$check	string	The SQL of the `CHECK` constraint to be added.

comment() public method (available since version 2.0.8)

Specifies the comment for column.

public $this comment ( $comment )
$comment	string	The comment

defaultExpression() public method (available since version 2.0.7)

Specify the default SQL expression for the column.

public $this defaultExpression ( $default )
$default	string	The default value expression.

defaultValue() public method

Specify the default value for the column.

public $this defaultValue ( $default )
$default	mixed	The default value.

first() public method (available since version 2.0.8)

Adds an FIRST constraint to the column.

Note: MySQL, Oracle and Cubrid support only.

public $this first ( )

getTypeCategory() protected method (available since version 2.0.8)

Returns the category of the column type.

protected string getTypeCategory ( )
return	string	A string containing the column type category name.

notNull() public method

Adds a NOT NULL constraint to the column.

public $this notNull ( )

null() public method (available since version 2.0.9)

Adds a NULL constraint to the column

public $this null ( )

unique() public method

Adds a UNIQUE constraint to the column.

public $this unique ( )

unsigned() public method (available since version 2.0.7)

Marks column as unsigned.

public $this unsigned ( )