public class | source

Transaction

The transaction object is used to identify a running transaction. It is created by calling Sequelize.transaction().

To run a query under a transaction, you should pass the transaction in the options object.

See:

Sequelize.transaction

Static Member Summary

Static Public Members
public static get	ISOLATION_LEVELS: {"READ_UNCOMMITTED": string, "READ_COMMITTED": string, "REPEATABLE_READ": string, "SERIALIZABLE": string} Isolations levels can be set per-transaction by passing `options.isolationLevel` to `sequelize.transaction`.
public static get	LOCK: Object: {"UPDATE": string, "SHARE": string, "KEY_SHARE": string, "NO_KEY_UPDATE": string} Possible options for row locking.
public static get	TYPES: {"DEFERRED": string, "IMMEDIATE": string, "EXCLUSIVE": string} Types can be set per-transaction by passing `options.type` to `sequelize.transaction`.

Constructor Summary

Public Constructor
public	constructor(sequelize: Sequelize, options: Object)

Member Summary

Public Members
public get	LOCK: *

Method Summary

Public Methods
public	afterCommit(fn: Function) A hook that is run after a transaction is committed
public	commit(): Promise Commit the transaction
public	rollback(): Promise Rollback (abort) the transaction

Static Public Members

public static get ISOLATION_LEVELS: {"READ_UNCOMMITTED": string, "READ_COMMITTED": string, "REPEATABLE_READ": string, "SERIALIZABLE": string} source

Isolations levels can be set per-transaction by passing options.isolationLevel to sequelize.transaction. Default to REPEATABLE_READ but you can override the default isolation level by passing options.isolationLevel in new Sequelize.

Pass in the desired level as the first argument:

return sequelize.transaction({isolationLevel: Sequelize.Transaction.ISOLATION_LEVELS.SERIALIZABLE}, transaction => {

 // your transactions

}).then(result => {
  // transaction has been committed. Do something after the commit if required.
}).catch(err => {
  // do something with the err.
});

Properties:

Name	Type	Attribute	Description
READ_UNCOMMITTED	*
READ_COMMITTED	*
REPEATABLE_READ	*
SERIALIZABLE	*

public static get LOCK: Object: {"UPDATE": string, "SHARE": string, "KEY_SHARE": string, "NO_KEY_UPDATE": string} source

Possible options for row locking. Used in conjunction with find calls:

t1 // is a transaction
Model.findAll({
  where: ...,
  transaction: t1,
  lock: t1.LOCK...
});

Postgres also supports specific locks while eager loading by using OF:

UserModel.findAll({
  where: ...,
  include: [TaskModel, ...],
  transaction: t1,
  lock: {
    level: t1.LOCK...,
    of: UserModel
  }
});

UserModel will be locked but TaskModel won't!

Properties:

Name	Type	Attribute	Description
UPDATE	*
SHARE	*
KEY_SHARE	*		Postgres 9.3+ only
NO_KEY_UPDATE	*		Postgres 9.3+ only

Return:

Object

Return Properties:

Name	Type	Attribute	Description
UPDATE	*
SHARE	*
KEY_SHARE	*		Postgres 9.3+ only
NO_KEY_UPDATE	*		Postgres 9.3+ only

public static get TYPES: {"DEFERRED": string, "IMMEDIATE": string, "EXCLUSIVE": string} source

Types can be set per-transaction by passing options.type to sequelize.transaction. Default to DEFERRED but you can override the default type by passing options.transactionType in new Sequelize. Sqlite only.

Pass in the desired level as the first argument:

return sequelize.transaction({type: Sequelize.Transaction.TYPES.EXCLUSIVE}, transaction => {

 // your transactions

}).then(result => {
  // transaction has been committed. Do something after the commit if required.
}).catch(err => {
  // do something with the err.
});

Properties:

Name	Type	Attribute	Description
DEFERRED	*
IMMEDIATE	*
EXCLUSIVE	*

Public Constructors

public constructor(sequelize: Sequelize, options: Object) source

Params:

Name	Type	Attribute	Description
sequelize	Sequelize		A configured sequelize Instance
options	Object		An object with options
options.autocommit	Boolean		Sets the autocommit property of the transaction.
options.type	String	default: true	Sets the type of the transaction.
options.isolationLevel	String	default: true	Sets the isolation level of the transaction.
options.deferrable	String		Sets the constraints to be deferred or immediately checked.

Public Members

public get LOCK: * source

See:

Transaction.LOCK

Public Methods

public afterCommit(fn: Function) source

A hook that is run after a transaction is committed

Params:

Name	Type	Attribute	Description
fn	Function		A callback function that is called with the committed transaction

public commit(): Promise source

Commit the transaction

Return:

Promise

public rollback(): Promise source

Rollback (abort) the transaction

Return:

Promise