Class yii\db\ColumnSchemaBuilder

Inheritanceyii\db\ColumnSchemaBuilder » yii\base\BaseObject
Implementsyii\base\Configurable
Subclassesyii\db\cubrid\ColumnSchemaBuilder, yii\db\mysql\ColumnSchemaBuilder, yii\db\oci\ColumnSchemaBuilder, yii\db\sqlite\ColumnSchemaBuilder
Available since version2.0.6
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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PropertyTypeDescriptionDefined 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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PropertyTypeDescriptionDefined 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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MethodDescriptionDefined By
__call() Calls the named method which is not a class method. yii\base\BaseObject
__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\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
__toString() Builds the full string for the column's schema. yii\db\ColumnSchemaBuilder
__unset() Sets an object property to null. yii\base\BaseObject
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\BaseObject
canSetProperty() Returns a value indicating whether a property can be set. yii\base\BaseObject
check() Sets a CHECK constraint for the column. yii\db\ColumnSchemaBuilder
className() Returns the fully qualified name of this class. yii\base\BaseObject
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\BaseObject
hasProperty() Returns a value indicating whether a property is defined. yii\base\BaseObject
init() Initializes the object. yii\base\BaseObject
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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MethodDescriptionDefined 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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ConstantValueDescriptionDefined 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 ( )