import * as tslib_1 from "tslib";
|
import { PromiseUtils } from "../util/PromiseUtils";
|
import { SubjectTopoligicalSorter } from "./SubjectTopoligicalSorter";
|
import { SubjectChangedColumnsComputer } from "./SubjectChangedColumnsComputer";
|
import { SubjectWithoutIdentifierError } from "../error/SubjectWithoutIdentifierError";
|
import { SubjectRemovedAndUpdatedError } from "../error/SubjectRemovedAndUpdatedError";
|
import { MongoQueryRunner } from "../driver/mongodb/MongoQueryRunner";
|
import { MongoDriver } from "../driver/mongodb/MongoDriver";
|
import { BroadcasterResult } from "../subscriber/BroadcasterResult";
|
import { OracleDriver } from "../driver/oracle/OracleDriver";
|
import { NestedSetSubjectExecutor } from "./tree/NestedSetSubjectExecutor";
|
import { ClosureSubjectExecutor } from "./tree/ClosureSubjectExecutor";
|
import { MaterializedPathSubjectExecutor } from "./tree/MaterializedPathSubjectExecutor";
|
import { OrmUtils } from "../util/OrmUtils";
|
/**
|
* Executes all database operations (inserts, updated, deletes) that must be executed
|
* with given persistence subjects.
|
*/
|
var SubjectExecutor = /** @class */ (function () {
|
// -------------------------------------------------------------------------
|
// Constructor
|
// -------------------------------------------------------------------------
|
function SubjectExecutor(queryRunner, subjects, options) {
|
// -------------------------------------------------------------------------
|
// Public Properties
|
// -------------------------------------------------------------------------
|
/**
|
* Indicates if executor has any operations to execute (e.g. has insert / update / delete operations to be executed).
|
*/
|
this.hasExecutableOperations = false;
|
/**
|
* Subjects that must be inserted.
|
*/
|
this.insertSubjects = [];
|
/**
|
* Subjects that must be updated.
|
*/
|
this.updateSubjects = [];
|
/**
|
* Subjects that must be removed.
|
*/
|
this.removeSubjects = [];
|
this.queryRunner = queryRunner;
|
this.allSubjects = subjects;
|
this.options = options;
|
this.validate();
|
this.recompute();
|
}
|
// -------------------------------------------------------------------------
|
// Public Methods
|
// -------------------------------------------------------------------------
|
/**
|
* Executes all operations over given array of subjects.
|
* Executes queries using given query runner.
|
*/
|
SubjectExecutor.prototype.execute = function () {
|
return tslib_1.__awaiter(this, void 0, void 0, function () {
|
var broadcasterResult;
|
return tslib_1.__generator(this, function (_a) {
|
switch (_a.label) {
|
case 0:
|
broadcasterResult = undefined;
|
if (!(!this.options || this.options.listeners !== false)) return [3 /*break*/, 2];
|
// console.time(".broadcastBeforeEventsForAll");
|
broadcasterResult = this.broadcastBeforeEventsForAll();
|
if (!(broadcasterResult.promises.length > 0)) return [3 /*break*/, 2];
|
return [4 /*yield*/, Promise.all(broadcasterResult.promises)];
|
case 1:
|
_a.sent();
|
_a.label = 2;
|
case 2:
|
// since event listeners and subscribers can call save methods and/or trigger entity changes we need to recompute operational subjects
|
// recompute only in the case if any listener or subscriber was really executed
|
if (broadcasterResult && broadcasterResult.count > 0) {
|
// console.time(".recompute");
|
this.insertSubjects.forEach(function (subject) { return subject.recompute(); });
|
this.updateSubjects.forEach(function (subject) { return subject.recompute(); });
|
this.removeSubjects.forEach(function (subject) { return subject.recompute(); });
|
this.recompute();
|
// console.timeEnd(".recompute");
|
}
|
// make sure our insert subjects are sorted (using topological sorting) to make cascade inserts work properly
|
// console.timeEnd("prepare");
|
// execute all insert operations
|
// console.time(".insertion");
|
this.insertSubjects = new SubjectTopoligicalSorter(this.insertSubjects).sort("insert");
|
return [4 /*yield*/, this.executeInsertOperations()];
|
case 3:
|
_a.sent();
|
// console.timeEnd(".insertion");
|
// recompute update operations since insertion can create updation operations for the
|
// properties it wasn't able to handle on its own (referenced columns)
|
this.updateSubjects = this.allSubjects.filter(function (subject) { return subject.mustBeUpdated; });
|
// execute update operations
|
// console.time(".updation");
|
return [4 /*yield*/, this.executeUpdateOperations()];
|
case 4:
|
// execute update operations
|
// console.time(".updation");
|
_a.sent();
|
// console.timeEnd(".updation");
|
// make sure our remove subjects are sorted (using topological sorting) when multiple entities are passed for the removal
|
// console.time(".removal");
|
this.removeSubjects = new SubjectTopoligicalSorter(this.removeSubjects).sort("delete");
|
return [4 /*yield*/, this.executeRemoveOperations()];
|
case 5:
|
_a.sent();
|
// console.timeEnd(".removal");
|
// update all special columns in persisted entities, like inserted id or remove ids from the removed entities
|
// console.time(".updateSpecialColumnsInPersistedEntities");
|
return [4 /*yield*/, this.updateSpecialColumnsInPersistedEntities()];
|
case 6:
|
// console.timeEnd(".removal");
|
// update all special columns in persisted entities, like inserted id or remove ids from the removed entities
|
// console.time(".updateSpecialColumnsInPersistedEntities");
|
_a.sent();
|
if (!(!this.options || this.options.listeners !== false)) return [3 /*break*/, 8];
|
// console.time(".broadcastAfterEventsForAll");
|
broadcasterResult = this.broadcastAfterEventsForAll();
|
if (!(broadcasterResult.promises.length > 0)) return [3 /*break*/, 8];
|
return [4 /*yield*/, Promise.all(broadcasterResult.promises)];
|
case 7:
|
_a.sent();
|
_a.label = 8;
|
case 8: return [2 /*return*/];
|
}
|
});
|
});
|
};
|
// -------------------------------------------------------------------------
|
// Protected Methods
|
// -------------------------------------------------------------------------
|
/**
|
* Validates all given subjects.
|
*/
|
SubjectExecutor.prototype.validate = function () {
|
this.allSubjects.forEach(function (subject) {
|
if (subject.mustBeUpdated && subject.mustBeRemoved)
|
throw new SubjectRemovedAndUpdatedError(subject);
|
});
|
};
|
/**
|
* Performs entity re-computations - finds changed columns, re-builds insert/update/remove subjects.
|
*/
|
SubjectExecutor.prototype.recompute = function () {
|
new SubjectChangedColumnsComputer().compute(this.allSubjects);
|
this.insertSubjects = this.allSubjects.filter(function (subject) { return subject.mustBeInserted; });
|
this.updateSubjects = this.allSubjects.filter(function (subject) { return subject.mustBeUpdated; });
|
this.removeSubjects = this.allSubjects.filter(function (subject) { return subject.mustBeRemoved; });
|
this.hasExecutableOperations = this.insertSubjects.length > 0 || this.updateSubjects.length > 0 || this.removeSubjects.length > 0;
|
};
|
/**
|
* Broadcasts "BEFORE_INSERT", "BEFORE_UPDATE", "BEFORE_REMOVE" events for all given subjects.
|
*/
|
SubjectExecutor.prototype.broadcastBeforeEventsForAll = function () {
|
var _this = this;
|
var result = new BroadcasterResult();
|
if (this.insertSubjects.length)
|
this.insertSubjects.forEach(function (subject) { return _this.queryRunner.broadcaster.broadcastBeforeInsertEvent(result, subject.metadata, subject.entity); });
|
if (this.updateSubjects.length)
|
this.updateSubjects.forEach(function (subject) { return _this.queryRunner.broadcaster.broadcastBeforeUpdateEvent(result, subject.metadata, subject.entity, subject.databaseEntity, subject.diffColumns, subject.diffRelations); });
|
if (this.removeSubjects.length)
|
this.removeSubjects.forEach(function (subject) { return _this.queryRunner.broadcaster.broadcastBeforeRemoveEvent(result, subject.metadata, subject.entity, subject.databaseEntity); });
|
return result;
|
};
|
/**
|
* Broadcasts "AFTER_INSERT", "AFTER_UPDATE", "AFTER_REMOVE" events for all given subjects.
|
* Returns void if there wasn't any listener or subscriber executed.
|
* Note: this method has a performance-optimized code organization.
|
*/
|
SubjectExecutor.prototype.broadcastAfterEventsForAll = function () {
|
var _this = this;
|
var result = new BroadcasterResult();
|
if (this.insertSubjects.length)
|
this.insertSubjects.forEach(function (subject) { return _this.queryRunner.broadcaster.broadcastAfterInsertEvent(result, subject.metadata, subject.entity); });
|
if (this.updateSubjects.length)
|
this.updateSubjects.forEach(function (subject) { return _this.queryRunner.broadcaster.broadcastAfterUpdateEvent(result, subject.metadata, subject.entity, subject.databaseEntity, subject.diffColumns, subject.diffRelations); });
|
if (this.removeSubjects.length)
|
this.removeSubjects.forEach(function (subject) { return _this.queryRunner.broadcaster.broadcastAfterRemoveEvent(result, subject.metadata, subject.entity, subject.databaseEntity); });
|
return result;
|
};
|
/**
|
* Executes insert operations.
|
*/
|
SubjectExecutor.prototype.executeInsertOperations = function () {
|
return tslib_1.__awaiter(this, void 0, void 0, function () {
|
var _a, groupedInsertSubjects, groupedInsertSubjectKeys;
|
var _this = this;
|
return tslib_1.__generator(this, function (_b) {
|
switch (_b.label) {
|
case 0:
|
_a = tslib_1.__read(this.groupBulkSubjects(this.insertSubjects, "insert"), 2), groupedInsertSubjects = _a[0], groupedInsertSubjectKeys = _a[1];
|
// then we run insertion in the sequential order which is important since we have an ordered subjects
|
return [4 /*yield*/, PromiseUtils.runInSequence(groupedInsertSubjectKeys, function (groupName) { return tslib_1.__awaiter(_this, void 0, void 0, function () {
|
var subjects, bulkInsertMaps, bulkInsertSubjects, singleInsertSubjects, manager, insertResult_1, insertResult_2;
|
var _this = this;
|
return tslib_1.__generator(this, function (_a) {
|
switch (_a.label) {
|
case 0:
|
subjects = groupedInsertSubjects[groupName];
|
bulkInsertMaps = [];
|
bulkInsertSubjects = [];
|
singleInsertSubjects = [];
|
if (this.queryRunner.connection.driver instanceof MongoDriver) {
|
subjects.forEach(function (subject) {
|
if (subject.metadata.createDateColumn && subject.entity) {
|
subject.entity[subject.metadata.createDateColumn.databaseName] = new Date();
|
}
|
if (subject.metadata.updateDateColumn && subject.entity) {
|
subject.entity[subject.metadata.updateDateColumn.databaseName] = new Date();
|
}
|
subject.createValueSetAndPopChangeMap();
|
bulkInsertSubjects.push(subject);
|
bulkInsertMaps.push(subject.entity);
|
});
|
}
|
else if (this.queryRunner.connection.driver instanceof OracleDriver) {
|
subjects.forEach(function (subject) {
|
singleInsertSubjects.push(subject);
|
});
|
}
|
else {
|
subjects.forEach(function (subject) {
|
// we do not insert in bulk in following cases:
|
// - when there is no values in insert (only defaults are inserted), since we cannot use DEFAULT VALUES expression for multiple inserted rows
|
// - when entity is a tree table, since tree tables require extra operation per each inserted row
|
// - when oracle is used, since oracle's bulk insertion is very bad
|
if (subject.changeMaps.length === 0 ||
|
subject.metadata.treeType ||
|
_this.queryRunner.connection.driver instanceof OracleDriver) {
|
singleInsertSubjects.push(subject);
|
}
|
else {
|
bulkInsertSubjects.push(subject);
|
bulkInsertMaps.push(subject.createValueSetAndPopChangeMap());
|
}
|
});
|
}
|
if (!(this.queryRunner instanceof MongoQueryRunner)) return [3 /*break*/, 2];
|
manager = this.queryRunner.manager;
|
return [4 /*yield*/, manager.insert(subjects[0].metadata.target, bulkInsertMaps)];
|
case 1:
|
insertResult_1 = _a.sent();
|
subjects.forEach(function (subject, index) {
|
subject.identifier = insertResult_1.identifiers[index];
|
subject.generatedMap = insertResult_1.generatedMaps[index];
|
subject.insertedValueSet = bulkInsertMaps[index];
|
});
|
return [3 /*break*/, 6];
|
case 2:
|
if (!(bulkInsertMaps.length > 0)) return [3 /*break*/, 4];
|
return [4 /*yield*/, this.queryRunner
|
.manager
|
.createQueryBuilder()
|
.insert()
|
.into(subjects[0].metadata.target)
|
.values(bulkInsertMaps)
|
.updateEntity(this.options && this.options.reload === false ? false : true)
|
.callListeners(false)
|
.execute()];
|
case 3:
|
insertResult_2 = _a.sent();
|
bulkInsertSubjects.forEach(function (subject, index) {
|
subject.identifier = insertResult_2.identifiers[index];
|
subject.generatedMap = insertResult_2.generatedMaps[index];
|
subject.insertedValueSet = bulkInsertMaps[index];
|
});
|
_a.label = 4;
|
case 4:
|
if (!(singleInsertSubjects.length > 0)) return [3 /*break*/, 6];
|
return [4 /*yield*/, PromiseUtils.runInSequence(singleInsertSubjects, function (subject) { return tslib_1.__awaiter(_this, void 0, void 0, function () {
|
return tslib_1.__generator(this, function (_a) {
|
switch (_a.label) {
|
case 0:
|
subject.insertedValueSet = subject.createValueSetAndPopChangeMap(); // important to have because query builder sets inserted values into it
|
if (!(subject.metadata.treeType === "nested-set")) return [3 /*break*/, 2];
|
return [4 /*yield*/, new NestedSetSubjectExecutor(this.queryRunner).insert(subject)];
|
case 1:
|
_a.sent();
|
_a.label = 2;
|
case 2: return [4 /*yield*/, this.queryRunner
|
.manager
|
.createQueryBuilder()
|
.insert()
|
.into(subject.metadata.target)
|
.values(subject.insertedValueSet)
|
.updateEntity(this.options && this.options.reload === false ? false : true)
|
.callListeners(false)
|
.execute()
|
.then(function (insertResult) {
|
subject.identifier = insertResult.identifiers[0];
|
subject.generatedMap = insertResult.generatedMaps[0];
|
})];
|
case 3:
|
_a.sent();
|
if (!(subject.metadata.treeType === "closure-table")) return [3 /*break*/, 5];
|
return [4 /*yield*/, new ClosureSubjectExecutor(this.queryRunner).insert(subject)];
|
case 4:
|
_a.sent();
|
return [3 /*break*/, 7];
|
case 5:
|
if (!(subject.metadata.treeType === "materialized-path")) return [3 /*break*/, 7];
|
return [4 /*yield*/, new MaterializedPathSubjectExecutor(this.queryRunner).insert(subject)];
|
case 6:
|
_a.sent();
|
_a.label = 7;
|
case 7: return [2 /*return*/];
|
}
|
});
|
}); })];
|
case 5:
|
_a.sent();
|
_a.label = 6;
|
case 6:
|
subjects.forEach(function (subject) {
|
if (subject.generatedMap) {
|
subject.metadata.columns.forEach(function (column) {
|
var value = column.getEntityValue(subject.generatedMap);
|
if (value !== undefined && value !== null) {
|
var preparedValue = _this.queryRunner.connection.driver.prepareHydratedValue(value, column);
|
column.setEntityValue(subject.generatedMap, preparedValue);
|
}
|
});
|
}
|
});
|
return [2 /*return*/];
|
}
|
});
|
}); })];
|
case 1:
|
// then we run insertion in the sequential order which is important since we have an ordered subjects
|
_b.sent();
|
return [2 /*return*/];
|
}
|
});
|
});
|
};
|
/**
|
* Updates all given subjects in the database.
|
*/
|
SubjectExecutor.prototype.executeUpdateOperations = function () {
|
return tslib_1.__awaiter(this, void 0, void 0, function () {
|
var _this = this;
|
return tslib_1.__generator(this, function (_a) {
|
switch (_a.label) {
|
case 0: return [4 /*yield*/, Promise.all(this.updateSubjects.map(function (subject) { return tslib_1.__awaiter(_this, void 0, void 0, function () {
|
var partialEntity, manager, updateMap, updateQueryBuilder, updateResult;
|
var _this = this;
|
return tslib_1.__generator(this, function (_a) {
|
switch (_a.label) {
|
case 0:
|
if (!subject.identifier)
|
throw new SubjectWithoutIdentifierError(subject);
|
if (!(this.queryRunner instanceof MongoQueryRunner)) return [3 /*break*/, 2];
|
partialEntity = OrmUtils.mergeDeep({}, subject.entity);
|
if (subject.metadata.objectIdColumn && subject.metadata.objectIdColumn.propertyName) {
|
delete partialEntity[subject.metadata.objectIdColumn.propertyName];
|
}
|
if (subject.metadata.createDateColumn && subject.metadata.createDateColumn.propertyName) {
|
delete partialEntity[subject.metadata.createDateColumn.propertyName];
|
}
|
if (subject.metadata.updateDateColumn && subject.metadata.updateDateColumn.propertyName) {
|
partialEntity[subject.metadata.updateDateColumn.propertyName] = new Date();
|
}
|
manager = this.queryRunner.manager;
|
return [4 /*yield*/, manager.update(subject.metadata.target, subject.identifier, partialEntity)];
|
case 1:
|
_a.sent();
|
return [3 /*break*/, 4];
|
case 2:
|
updateMap = subject.createValueSetAndPopChangeMap();
|
updateQueryBuilder = this.queryRunner
|
.manager
|
.createQueryBuilder()
|
.update(subject.metadata.target)
|
.set(updateMap)
|
.updateEntity(this.options && this.options.reload === false ? false : true)
|
.callListeners(false);
|
if (subject.entity) {
|
updateQueryBuilder.whereEntity(subject.identifier);
|
}
|
else { // in this case identifier is just conditions object to update by
|
updateQueryBuilder.where(subject.identifier);
|
}
|
return [4 /*yield*/, updateQueryBuilder.execute()];
|
case 3:
|
updateResult = _a.sent();
|
subject.generatedMap = updateResult.generatedMaps[0];
|
if (subject.generatedMap) {
|
subject.metadata.columns.forEach(function (column) {
|
var value = column.getEntityValue(subject.generatedMap);
|
if (value !== undefined && value !== null) {
|
var preparedValue = _this.queryRunner.connection.driver.prepareHydratedValue(value, column);
|
column.setEntityValue(subject.generatedMap, preparedValue);
|
}
|
});
|
}
|
_a.label = 4;
|
case 4: return [2 /*return*/];
|
}
|
});
|
}); }))];
|
case 1:
|
_a.sent();
|
return [2 /*return*/];
|
}
|
});
|
});
|
};
|
/**
|
* Removes all given subjects from the database.
|
*
|
* todo: we need to apply topological sort here as well
|
*/
|
SubjectExecutor.prototype.executeRemoveOperations = function () {
|
return tslib_1.__awaiter(this, void 0, void 0, function () {
|
var _a, groupedRemoveSubjects, groupedRemoveSubjectKeys;
|
var _this = this;
|
return tslib_1.__generator(this, function (_b) {
|
switch (_b.label) {
|
case 0:
|
_a = tslib_1.__read(this.groupBulkSubjects(this.removeSubjects, "delete"), 2), groupedRemoveSubjects = _a[0], groupedRemoveSubjectKeys = _a[1];
|
return [4 /*yield*/, PromiseUtils.runInSequence(groupedRemoveSubjectKeys, function (groupName) { return tslib_1.__awaiter(_this, void 0, void 0, function () {
|
var subjects, deleteMaps, manager;
|
return tslib_1.__generator(this, function (_a) {
|
switch (_a.label) {
|
case 0:
|
subjects = groupedRemoveSubjects[groupName];
|
deleteMaps = subjects.map(function (subject) {
|
if (!subject.identifier)
|
throw new SubjectWithoutIdentifierError(subject);
|
return subject.identifier;
|
});
|
if (!(this.queryRunner instanceof MongoQueryRunner)) return [3 /*break*/, 2];
|
manager = this.queryRunner.manager;
|
return [4 /*yield*/, manager.delete(subjects[0].metadata.target, deleteMaps)];
|
case 1:
|
_a.sent();
|
return [3 /*break*/, 4];
|
case 2:
|
// here we execute our deletion query
|
// we don't need to specify entities and set update entity to true since the only thing query builder
|
// will do for use is a primary keys deletion which is handled by us later once persistence is finished
|
// also, we disable listeners because we call them on our own in persistence layer
|
return [4 /*yield*/, this.queryRunner
|
.manager
|
.createQueryBuilder()
|
.delete()
|
.from(subjects[0].metadata.target)
|
.where(deleteMaps)
|
.callListeners(false)
|
.execute()];
|
case 3:
|
// here we execute our deletion query
|
// we don't need to specify entities and set update entity to true since the only thing query builder
|
// will do for use is a primary keys deletion which is handled by us later once persistence is finished
|
// also, we disable listeners because we call them on our own in persistence layer
|
_a.sent();
|
_a.label = 4;
|
case 4: return [2 /*return*/];
|
}
|
});
|
}); })];
|
case 1:
|
_b.sent();
|
return [2 /*return*/];
|
}
|
});
|
});
|
};
|
/**
|
* Updates all special columns of the saving entities (create date, update date, version, etc.).
|
* Also updates nullable columns and columns with default values.
|
*/
|
SubjectExecutor.prototype.updateSpecialColumnsInPersistedEntities = function () {
|
var _this = this;
|
// update inserted entity properties
|
if (this.insertSubjects.length)
|
this.updateSpecialColumnsInInsertedAndUpdatedEntities(this.insertSubjects);
|
// update updated entity properties
|
if (this.updateSubjects.length)
|
this.updateSpecialColumnsInInsertedAndUpdatedEntities(this.updateSubjects);
|
// remove ids from the entities that were removed
|
if (this.removeSubjects.length) {
|
this.removeSubjects.forEach(function (subject) {
|
if (!subject.entity)
|
return;
|
subject.metadata.primaryColumns.forEach(function (primaryColumn) {
|
primaryColumn.setEntityValue(subject.entity, undefined);
|
});
|
});
|
}
|
// other post-persist updations
|
this.allSubjects.forEach(function (subject) {
|
if (!subject.entity)
|
return;
|
subject.metadata.relationIds.forEach(function (relationId) {
|
relationId.setValue(subject.entity);
|
});
|
// mongo _id remove
|
if (_this.queryRunner instanceof MongoQueryRunner) {
|
if (subject.metadata.objectIdColumn
|
&& subject.metadata.objectIdColumn.databaseName
|
&& subject.metadata.objectIdColumn.databaseName !== subject.metadata.objectIdColumn.propertyName) {
|
delete subject.entity[subject.metadata.objectIdColumn.databaseName];
|
}
|
}
|
});
|
};
|
/**
|
* Updates all special columns of the saving entities (create date, update date, version, etc.).
|
* Also updates nullable columns and columns with default values.
|
*/
|
SubjectExecutor.prototype.updateSpecialColumnsInInsertedAndUpdatedEntities = function (subjects) {
|
var _this = this;
|
subjects.forEach(function (subject) {
|
if (!subject.entity)
|
return;
|
// set values to "null" for nullable columns that did not have values
|
subject.metadata.columns.forEach(function (column) {
|
// if table inheritance is used make sure this column is not child's column
|
if (subject.metadata.childEntityMetadatas.length > 0 && subject.metadata.childEntityMetadatas.map(function (metadata) { return metadata.target; }).indexOf(column.target) !== -1)
|
return;
|
// entities does not have virtual columns
|
if (column.isVirtual)
|
return;
|
// update nullable columns
|
if (column.isNullable) {
|
var columnValue = column.getEntityValue(subject.entity);
|
if (columnValue === undefined)
|
column.setEntityValue(subject.entity, null);
|
}
|
// update relational columns
|
if (subject.updatedRelationMaps.length > 0) {
|
subject.updatedRelationMaps.forEach(function (updatedRelationMap) {
|
updatedRelationMap.relation.joinColumns.forEach(function (column) {
|
if (column.isVirtual === true)
|
return;
|
column.setEntityValue(subject.entity, updatedRelationMap.value instanceof Object ? column.referencedColumn.getEntityValue(updatedRelationMap.value) : updatedRelationMap.value);
|
});
|
});
|
}
|
});
|
// merge into entity all generated values returned by a database
|
if (subject.generatedMap)
|
_this.queryRunner.manager.merge(subject.metadata.target, subject.entity, subject.generatedMap);
|
});
|
};
|
/**
|
* Groups subjects by metadata names (by tables) to make bulk insertions and deletions possible.
|
* However there are some limitations with bulk insertions of data into tables with generated (increment) columns
|
* in some drivers. Some drivers like mysql and sqlite does not support returning multiple generated columns
|
* after insertion and can only return a single generated column value, that's why its not possible to do bulk insertion,
|
* because it breaks insertion result's generatedMap and leads to problems when this subject is used in other subjects saves.
|
* That's why we only support bulking in junction tables for those drivers.
|
*
|
* Other drivers like postgres and sql server support RETURNING / OUTPUT statement which allows to return generated
|
* id for each inserted row, that's why bulk insertion is not limited to junction tables in there.
|
*/
|
SubjectExecutor.prototype.groupBulkSubjects = function (subjects, type) {
|
var group = {};
|
var keys = [];
|
var groupingAllowed = type === "delete" || this.queryRunner.connection.driver.isReturningSqlSupported();
|
subjects.forEach(function (subject, index) {
|
var key = groupingAllowed || subject.metadata.isJunction ? subject.metadata.name : subject.metadata.name + "_" + index;
|
if (!group[key]) {
|
group[key] = [subject];
|
keys.push(key);
|
}
|
else {
|
group[key].push(subject);
|
}
|
});
|
return [group, keys];
|
};
|
return SubjectExecutor;
|
}());
|
export { SubjectExecutor };
|
|
//# sourceMappingURL=SubjectExecutor.js.map
|
