Class BLOB

Binary storage. BLOB is the "TEXT" of binary data: it allows data of arbitrary size.

Fallback policy: If this type is not supported, an error will be raised.

Example

const User = sequelize.define('User', {
  profilePicture: {
    type: DataTypes.BLOB,
  },
});

Hierarchy (View Summary)

ABSTRACT<AcceptedBlob>
- BLOB

Constructors

constructor

new BLOB(lengthOrOptions?: BlobLength | BlobOptions): BLOB
Parameters
- OptionallengthOrOptions: BlobLength | BlobOptions
  could be tiny, medium, long.
Returns BLOB
Overrides ABSTRACT.constructor
- Defined in packages/core/src/abstract-dialect/data-types.ts:1785

Properties

`Readonly`options

options: BlobOptions

usageContext

usageContext: undefined | DataTypeUseContext

Where this DataType is being used.

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
Inherited from ABSTRACT._checkOptionSupport
- Defined in packages/core/src/abstract-dialect/data-types.ts:286

`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: AcceptedBlob, originalValue: AcceptedBlob): boolean
Parameters
- value: AcceptedBlob
- originalValue: AcceptedBlob
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:1837

getBindParamSql

getBindParamSql(value: AcceptedBlob, 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: AcceptedBlob
  The value to bind.
- options: BindParamOptions
  Options.
Returns string
Overrides ABSTRACT.getBindParamSql
- Defined in packages/core/src/abstract-dialect/data-types.ts:1843

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
Overrides ABSTRACT.sanitize
- Defined in packages/core/src/abstract-dialect/data-types.ts:1825

toBindableValue

toBindableValue(value: AcceptedBlob): 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: AcceptedBlob
  The value to convert.
Returns unknown
Inherited from ABSTRACT.toBindableValue
- Defined in packages/core/src/abstract-dialect/data-types.ts:257

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:1795

toString

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

validate

validate(value: any): void
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 void
Overrides ABSTRACT.validate
- Defined in packages/core/src/abstract-dialect/data-types.ts:1808

Class BLOB

Example

Hierarchy (View Summary)

Index

Constructors

Properties

Methods

Constructors

constructor

Parameters

Returns BLOB

Properties

Readonlyoptions

usageContext

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 void

withUsageContext

Parameters

Returns this

StaticgetDataTypeId

Returns string

StatictoString

Returns string

Settings

On This Page

`Readonly`options

`Protected`_checkOptionSupport

`Protected`_construct

`Protected`_getDialect

`Static`getDataTypeId

`Static`toString