Class STRING

Represents a variable length string type.

Fallback policy:

If the 'length' option is not supported by the dialect, a CHECK constraint will be added to ensure the value remains within the specified length.
If the 'binary' option is not supported by the dialect, a suitable binary type will be used instead. If none is available, an error will be raised instead.

Example

DataTypes.STRING(255)

Hierarchy (View Summary)

ABSTRACT<string | Buffer>
- STRING
  - CHAR

Index

Constructors

constructor

new STRING(length: number, binary?: boolean): STRING
Parameters
- length: number
- Optionalbinary: boolean
Returns STRING
Overrides ABSTRACT.constructor
- Defined in packages/core/src/abstract-dialect/data-types.ts:407
new STRING(options?: StringTypeOptions): STRING
Parameters
- Optionaloptions: StringTypeOptions
Returns STRING
Overrides AbstractDataType<string | Buffer>.constructor
- Defined in packages/core/src/abstract-dialect/data-types.ts:408

Properties

`Readonly`options

options: StringTypeOptions

usageContext

usageContext: undefined | DataTypeUseContext

Where this DataType is being used.

Accessors

BINARY

get BINARY(): this
Returns this
- Defined in packages/core/src/abstract-dialect/data-types.ts:476

`Static`BINARY

get BINARY(): STRING
Returns STRING
- Defined in packages/core/src/abstract-dialect/data-types.ts:483

Methods

`Protected`_checkOptionSupport

_checkOptionSupport(dialect: AbstractDialect): void
Override this method to emit an error or a warning if the Data Type, as it is configured, is not compatible with the current dialect.
Parameters
- dialect: AbstractDialect
  The dialect using this data type.
Returns void
Overrides ABSTRACT._checkOptionSupport
- Defined in packages/core/src/abstract-dialect/data-types.ts:436

`Protected`_construct

_construct<Constructor extends new () => ABSTRACT<any>>(
...args: ConstructorParameters<Constructor>,
): this
Type Parameters
- Constructor extends new () => ABSTRACT<any>
Parameters
- ...args: ConstructorParameters<Constructor>
Returns this
Inherited from ABSTRACT._construct
- Defined in packages/core/src/abstract-dialect/data-types.ts:159

`Protected`_getDialect

_getDialect(): AbstractDialect
Returns AbstractDialect
Inherited from ABSTRACT._getDialect
- Defined in packages/core/src/abstract-dialect/data-types.ts:108

acceptsNull

acceptsNull(): boolean
Whether this DataType wishes to handle NULL values itself. This is almost exclusively used by JSON and JSONB which serialize null as the JSON string 'null'.

Returns boolean
Inherited from ABSTRACT.acceptsNull
- Defined in packages/core/src/abstract-dialect/data-types.ts:177

areValuesEqual

areValuesEqual(
value: string | Buffer<ArrayBufferLike>,
originalValue: string | Buffer<ArrayBufferLike>,
): boolean
Parameters
- value: string | Buffer<ArrayBufferLike>
- originalValue: string | Buffer<ArrayBufferLike>
Returns boolean
Inherited from ABSTRACT.areValuesEqual
- Defined in packages/core/src/abstract-dialect/data-types.ts:169

belongsToDialect

belongsToDialect(dialect: AbstractDialect): boolean
Parameters
- dialect: AbstractDialect
Returns boolean
Inherited from ABSTRACT.belongsToDialect
- Defined in packages/core/src/abstract-dialect/data-types.ts:291

clone

clone(): this
Returns a copy of this DataType, without usage context. Designed to re-use a DataType on another Model.

Returns this
Inherited from ABSTRACT.clone
- Defined in packages/core/src/abstract-dialect/data-types.ts:333

escape

escape(value: string | Buffer<ArrayBufferLike>): string
Escapes a value for the purposes of inlining it in a SQL query. The resulting value will be inlined as-is with no further escaping.
Parameters
- value: string | Buffer<ArrayBufferLike>
  The value to escape.
Returns string
Overrides ABSTRACT.escape
- Defined in packages/core/src/abstract-dialect/data-types.ts:487

getBindParamSql

getBindParamSql(
value: string | Buffer<ArrayBufferLike>,
options: BindParamOptions,
): string
This method is called when AbstractQueryGenerator needs to add a bind parameter to a query it is building. This method allows for customizing both the SQL to add to the query, and convert the bind parameter value to a DB-compatible value.

If you only need to prepare the bind param value, implement toBindableValue instead.

This method must return the SQL to add to the query. You can obtain a bind parameter ID by calling BindParamOptions#bindParam with the value associated to that bind parameter.

An example of a data type that requires customizing the SQL is the GEOMETRY data type.
Parameters
- value: string | Buffer<ArrayBufferLike>
  The value to bind.
- options: BindParamOptions
  Options.
Returns string
Inherited from ABSTRACT.getBindParamSql
- Defined in packages/core/src/abstract-dialect/data-types.ts:245

getDataTypeId

getDataTypeId(): string
Returns string
Inherited from ABSTRACT.getDataTypeId
- Defined in packages/core/src/abstract-dialect/data-types.ts:97

parseDatabaseValue

parseDatabaseValue(value: unknown): unknown
Called when a value is retrieved from the Database, and its DataType is specified. Used to normalize values from the database.

Note: It is also possible to do an initial parsing of a Database value using AbstractDialect#registerDataTypeParser. That normalization uses the type ID from the database instead of a Sequelize Data Type to determine which parser to use, and is called before this method.
Parameters
- value: unknown
  The value to parse.
Returns unknown
Inherited from ABSTRACT.parseDatabaseValue
- Defined in packages/core/src/abstract-dialect/data-types.ts:191

sanitize

sanitize(value: unknown): unknown
Used to normalize a value when Model#set is called. That is, when a user sets a value on a Model instance.
Parameters
- value: unknown
Returns unknown
Inherited from ABSTRACT.sanitize
- Defined in packages/core/src/abstract-dialect/data-types.ts:201

toBindableValue

toBindableValue(value: string | Buffer<ArrayBufferLike>): unknown
Converts a JS value to a value compatible with the connector library for this Data Type. Unlike escape, this value does not need to be escaped. It is passed separately to the database, which will handle escaping.
Parameters
- value: string | Buffer<ArrayBufferLike>
  The value to convert.
Returns unknown
Overrides ABSTRACT.toBindableValue
- Defined in packages/core/src/abstract-dialect/data-types.ts:495

toDialectDataType

toDialectDataType(dialect: AbstractDialect): this
Returns this DataType, using its dialect-specific subclass.
Parameters
- dialect: AbstractDialect
Returns this
Inherited from ABSTRACT.toDialectDataType
- Defined in packages/core/src/abstract-dialect/data-types.ts:300

toSql

toSql(): string
Returns a SQL declaration of this data type. e.g. 'VARCHAR(255)', 'TEXT', etc…

Returns string
Overrides ABSTRACT.toSql
- Defined in packages/core/src/abstract-dialect/data-types.ts:442

toString

toString(): string
Returns string
Inherited from ABSTRACT.toString
- Defined in packages/core/src/abstract-dialect/data-types.ts:261

validate

validate(value: any): asserts value is string | Buffer<ArrayBufferLike>
Checks whether the JS value is compatible with (or can be converted to) the SQL data type. Throws if that is not the case.
Parameters
- value: any
Returns asserts value is string | Buffer<ArrayBufferLike>
Overrides ABSTRACT.validate
- Defined in packages/core/src/abstract-dialect/data-types.ts:450

Class STRING

Example

Hierarchy (View Summary)

Index

Constructors

Properties

Accessors

Methods

Constructors

constructor

Parameters

Returns STRING

Parameters

Returns STRING

Properties

Readonlyoptions

usageContext

Accessors

BINARY

Returns this

StaticBINARY

Returns STRING

Methods

Protected_checkOptionSupport

Parameters

Returns void

Protected_construct

Type Parameters

Parameters

Returns this

Protected_getDialect

Returns AbstractDialect

acceptsNull

Returns boolean

areValuesEqual

Parameters

Returns boolean

belongsToDialect

Parameters

Returns boolean

clone

Returns this

escape

Parameters

Returns string

getBindParamSql

Parameters

Returns string

getDataTypeId

Returns string

parseDatabaseValue

Parameters

Returns unknown

sanitize

Parameters

Returns unknown

toBindableValue

Parameters

Returns unknown

toDialectDataType

Parameters

Returns this

toSql

Returns string

toString

Returns string

validate

Parameters

Returns asserts value is string | Buffer<ArrayBufferLike>

withUsageContext

Parameters

Returns this

StaticgetDataTypeId

Returns string

StatictoString

Returns string

Settings

On This Page

`Readonly`options

`Static`BINARY

`Protected`_checkOptionSupport

`Protected`_construct

`Protected`_getDialect

`Static`getDataTypeId

`Static`toString