sequelize/lib/transaction.js

Sequelize is a promise-based Node.js ORM tool for Postgres, MySQL, MariaDB, SQLite, Microsoft SQL Server, Amazon Redshift and Snowflake’s Data Cloud. It features solid transaction support, relations, eager and lazy loading, read replication and more.

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropSymbols = Object.getOwnPropertySymbols;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __propIsEnum = Object.prototype.propertyIsEnumerable;
var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
var __spreadValues = (a, b) => {
  for (var prop in b || (b = {}))
    if (__hasOwnProp.call(b, prop))
      __defNormalProp(a, prop, b[prop]);
  if (__getOwnPropSymbols)
    for (var prop of __getOwnPropSymbols(b)) {
      if (__propIsEnum.call(b, prop))
        __defNormalProp(a, prop, b[prop]);
    }
  return a;
};
class Transaction {
  constructor(sequelize, options) {
    this.sequelize = sequelize;
    this.savepoints = [];
    this._afterCommitHooks = [];
    const generateTransactionId = this.sequelize.dialect.queryGenerator.generateTransactionId;
    this.options = __spreadValues({
      type: sequelize.options.transactionType,
      isolationLevel: sequelize.options.isolationLevel,
      readOnly: false
    }, options);
    this.parent = this.options.transaction;
    if (this.parent) {
      this.id = this.parent.id;
      this.parent.savepoints.push(this);
      this.name = `${this.id}-sp-${this.parent.savepoints.length}`;
    } else {
      this.id = this.name = generateTransactionId();
    }
    delete this.options.transaction;
  }
  async commit() {
    if (this.finished) {
      throw new Error(`Transaction cannot be committed because it has been finished with state: ${this.finished}`);
    }
    try {
      await this.sequelize.getQueryInterface().commitTransaction(this, this.options);
      this.cleanup();
    } catch (e) {
      console.warn(`Committing transaction ${this.id} failed with error ${JSON.stringify(e.message)}. We are killing its connection as it is now in an undetermined state.`);
      await this.forceCleanup();
      throw e;
    } finally {
      this.finished = "commit";
      for (const hook of this._afterCommitHooks) {
        await hook.apply(this, [this]);
      }
    }
  }
  async rollback() {
    if (this.finished) {
      throw new Error(`Transaction cannot be rolled back because it has been finished with state: ${this.finished}`);
    }
    if (!this.connection) {
      throw new Error("Transaction cannot be rolled back because it never started");
    }
    try {
      await this.sequelize.getQueryInterface().rollbackTransaction(this, this.options);
      this.cleanup();
    } catch (e) {
      console.warn(`Rolling back transaction ${this.id} failed with error ${JSON.stringify(e.message)}. We are killing its connection as it is now in an undetermined state.`);
      await this.forceCleanup();
      throw e;
    }
  }
  async prepareEnvironment(useCLS = true) {
    let connectionPromise;
    if (this.parent) {
      connectionPromise = Promise.resolve(this.parent.connection);
    } else {
      const acquireOptions = { uuid: this.id };
      if (this.options.readOnly) {
        acquireOptions.type = "SELECT";
      }
      connectionPromise = this.sequelize.connectionManager.getConnection(acquireOptions);
    }
    let result;
    const connection = await connectionPromise;
    this.connection = connection;
    this.connection.uuid = this.id;
    try {
      await this.begin();
      result = await this.setDeferrable();
    } catch (setupErr) {
      try {
        result = await this.rollback();
      } finally {
        throw setupErr;
      }
    }
    if (useCLS && this.sequelize.constructor._cls) {
      this.sequelize.constructor._cls.set("transaction", this);
    }
    return result;
  }
  async setDeferrable() {
    if (this.options.deferrable) {
      return await this.sequelize.getQueryInterface().deferConstraints(this, this.options);
    }
  }
  async begin() {
    const queryInterface = this.sequelize.getQueryInterface();
    if (this.sequelize.dialect.supports.settingIsolationLevelDuringTransaction) {
      await queryInterface.startTransaction(this, this.options);
      return queryInterface.setIsolationLevel(this, this.options.isolationLevel, this.options);
    }
    await queryInterface.setIsolationLevel(this, this.options.isolationLevel, this.options);
    return queryInterface.startTransaction(this, this.options);
  }
  cleanup() {
    if (this.parent || this.connection.uuid === void 0) {
      return;
    }
    this._clearCls();
    this.sequelize.connectionManager.releaseConnection(this.connection);
    this.connection.uuid = void 0;
  }
  async forceCleanup() {
    if (this.parent || this.connection.uuid === void 0) {
      return;
    }
    this._clearCls();
    await this.sequelize.connectionManager.destroyConnection(this.connection);
    this.connection.uuid = void 0;
  }
  _clearCls() {
    const cls = this.sequelize.constructor._cls;
    if (cls) {
      if (cls.get("transaction") === this) {
        cls.set("transaction", null);
      }
    }
  }
  afterCommit(fn) {
    if (!fn || typeof fn !== "function") {
      throw new Error('"fn" must be a function');
    }
    this._afterCommitHooks.push(fn);
  }
  static get TYPES() {
    return {
      DEFERRED: "DEFERRED",
      IMMEDIATE: "IMMEDIATE",
      EXCLUSIVE: "EXCLUSIVE"
    };
  }
  static get ISOLATION_LEVELS() {
    return {
      READ_UNCOMMITTED: "READ UNCOMMITTED",
      READ_COMMITTED: "READ COMMITTED",
      REPEATABLE_READ: "REPEATABLE READ",
      SERIALIZABLE: "SERIALIZABLE"
    };
  }
  static get LOCK() {
    return {
      UPDATE: "UPDATE",
      SHARE: "SHARE",
      KEY_SHARE: "KEY SHARE",
      NO_KEY_UPDATE: "NO KEY UPDATE"
    };
  }
  get LOCK() {
    return Transaction.LOCK;
  }
}
module.exports = Transaction;
module.exports.Transaction = Transaction;
module.exports.default = Transaction;
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