typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
171 lines (169 loc) • 9.35 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.EntityPersistExecutor = void 0;
const MustBeEntityError_1 = require("../error/MustBeEntityError");
const SubjectExecutor_1 = require("./SubjectExecutor");
const CannotDetermineEntityError_1 = require("../error/CannotDetermineEntityError");
const Subject_1 = require("./Subject");
const OneToManySubjectBuilder_1 = require("./subject-builder/OneToManySubjectBuilder");
const OneToOneInverseSideSubjectBuilder_1 = require("./subject-builder/OneToOneInverseSideSubjectBuilder");
const ManyToManySubjectBuilder_1 = require("./subject-builder/ManyToManySubjectBuilder");
const SubjectDatabaseEntityLoader_1 = require("./SubjectDatabaseEntityLoader");
const CascadesSubjectBuilder_1 = require("./subject-builder/CascadesSubjectBuilder");
const OrmUtils_1 = require("../util/OrmUtils");
/**
* Persists a single entity or multiple entities - saves or removes them.
*/
class EntityPersistExecutor {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
constructor(connection, queryRunner, mode, target, entity, options) {
this.connection = connection;
this.queryRunner = queryRunner;
this.mode = mode;
this.target = target;
this.entity = entity;
this.options = options;
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
/**
* Executes persistence operation ob given entity or entities.
*/
async execute() {
// check if entity we are going to save is valid and is an object
if (!this.entity || typeof this.entity !== "object")
return Promise.reject(new MustBeEntityError_1.MustBeEntityError(this.mode, this.entity));
// we MUST call "fake" resolve here to make sure all properties of lazily loaded relations are resolved
await Promise.resolve();
// if query runner is already defined in this class, it means this entity manager was already created for a single connection
// if its not defined we create a new query runner - single connection where we'll execute all our operations
const queryRunner = this.queryRunner || this.connection.createQueryRunner();
// save data in the query runner - this is useful functionality to share data from outside of the world
// with third classes - like subscribers and listener methods
let oldQueryRunnerData = queryRunner.data;
if (this.options && this.options.data) {
queryRunner.data = this.options.data;
}
try {
// collect all operate subjects
const entities = Array.isArray(this.entity)
? this.entity
: [this.entity];
const entitiesInChunks = this.options && this.options.chunk && this.options.chunk > 0
? OrmUtils_1.OrmUtils.chunk(entities, this.options.chunk)
: [entities];
// console.time("building subject executors...");
const executors = await Promise.all(entitiesInChunks.map(async (entities) => {
const subjects = [];
// create subjects for all entities we received for the persistence
entities.forEach((entity) => {
const entityTarget = this.target
? this.target
: entity.constructor;
if (entityTarget === Object)
throw new CannotDetermineEntityError_1.CannotDetermineEntityError(this.mode);
let metadata = this.connection
.getMetadata(entityTarget)
.findInheritanceMetadata(entity);
subjects.push(new Subject_1.Subject({
metadata,
entity: entity,
canBeInserted: this.mode === "save",
canBeUpdated: this.mode === "save",
mustBeRemoved: this.mode === "remove",
canBeSoftRemoved: this.mode === "soft-remove",
canBeRecovered: this.mode === "recover",
}));
});
// console.time("building cascades...");
// go through each entity with metadata and create subjects and subjects by cascades for them
const cascadesSubjectBuilder = new CascadesSubjectBuilder_1.CascadesSubjectBuilder(subjects);
subjects.forEach((subject) => {
// next step we build list of subjects we will operate with
// these subjects are subjects that we need to insert or update alongside with main persisted entity
cascadesSubjectBuilder.build(subject, this.mode);
});
// console.timeEnd("building cascades...");
// load database entities for all subjects we have
// next step is to load database entities for all operate subjects
// console.time("loading...");
await new SubjectDatabaseEntityLoader_1.SubjectDatabaseEntityLoader(queryRunner, subjects).load(this.mode);
// console.timeEnd("loading...");
// console.time("other subjects...");
// build all related subjects and change maps
if (this.mode === "save" ||
this.mode === "soft-remove" ||
this.mode === "recover") {
new OneToManySubjectBuilder_1.OneToManySubjectBuilder(subjects).build();
new OneToOneInverseSideSubjectBuilder_1.OneToOneInverseSideSubjectBuilder(subjects).build();
new ManyToManySubjectBuilder_1.ManyToManySubjectBuilder(subjects).build();
}
else {
subjects.forEach((subject) => {
if (subject.mustBeRemoved) {
new ManyToManySubjectBuilder_1.ManyToManySubjectBuilder(subjects).buildForAllRemoval(subject);
}
});
}
// console.timeEnd("other subjects...");
// console.timeEnd("building subjects...");
// console.log("subjects", subjects);
// create a subject executor
return new SubjectExecutor_1.SubjectExecutor(queryRunner, subjects, this.options);
}));
// console.timeEnd("building subject executors...");
// make sure we have at least one executable operation before we create a transaction and proceed
// if we don't have operations it means we don't really need to update or remove something
const executorsWithExecutableOperations = executors.filter((executor) => executor.hasExecutableOperations);
if (executorsWithExecutableOperations.length === 0)
return;
// start execute queries in a transaction
// if transaction is already opened in this query runner then we don't touch it
// if its not opened yet then we open it here, and once we finish - we close it
let isTransactionStartedByUs = false;
try {
// open transaction if its not opened yet
if (!queryRunner.isTransactionActive) {
if (this.connection.driver.transactionSupport !== "none" &&
(!this.options || this.options.transaction !== false)) {
// start transaction until it was not explicitly disabled
isTransactionStartedByUs = true;
await queryRunner.startTransaction();
}
}
// execute all persistence operations for all entities we have
// console.time("executing subject executors...");
for (const executor of executorsWithExecutableOperations) {
await executor.execute();
}
// console.timeEnd("executing subject executors...");
// commit transaction if it was started by us
// console.time("commit");
if (isTransactionStartedByUs === true)
await queryRunner.commitTransaction();
// console.timeEnd("commit");
}
catch (error) {
// rollback transaction if it was started by us
if (isTransactionStartedByUs) {
try {
await queryRunner.rollbackTransaction();
}
catch (rollbackError) { }
}
throw error;
}
}
finally {
queryRunner.data = oldQueryRunnerData;
// release query runner only if its created by us
if (!this.queryRunner)
await queryRunner.release();
}
}
}
exports.EntityPersistExecutor = EntityPersistExecutor;
//# sourceMappingURL=EntityPersistExecutor.js.map