typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
162 lines (160 loc) • 10.4 kB
JavaScript
import { __awaiter, __generator, __read, __spreadArray, __values } from "tslib";
/**
* Loads database entities for all operate subjects which do not have database entity set.
* All entities that we load database entities for are marked as updated or inserted.
* To understand which of them really needs to be inserted or updated we need to load
* their original representations from the database.
*/
var SubjectDatabaseEntityLoader = /** @class */ (function () {
// ---------------------------------------------------------------------
// Constructor
// ---------------------------------------------------------------------
function SubjectDatabaseEntityLoader(queryRunner, subjects) {
this.queryRunner = queryRunner;
this.subjects = subjects;
}
// ---------------------------------------------------------------------
// Public Methods
// ---------------------------------------------------------------------
/**
* Loads database entities for all subjects.
*
* loadAllRelations flag is used to load all relation ids of the object, no matter if they present in subject entity or not.
* This option is used for deletion.
*/
SubjectDatabaseEntityLoader.prototype.load = function (operationType) {
return __awaiter(this, void 0, void 0, function () {
var promises;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
promises = this.groupByEntityTargets().map(function (subjectGroup) { return __awaiter(_this, void 0, void 0, function () {
var allIds, allSubjects, loadRelationPropertyPaths, findOptions, entities, allSubjects_1, allSubjects_1_1, subject;
var e_1, _a;
var _this = this;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
allIds = [];
allSubjects = [];
subjectGroup.subjects.forEach(function (subject) {
// we don't load if subject already has a database entity loaded
if (subject.databaseEntity || !subject.identifier)
return;
allIds.push(subject.identifier);
allSubjects.push(subject);
});
// if there no ids found (means all entities are new and have generated ids) - then nothing to load there
if (!allIds.length)
return [2 /*return*/];
loadRelationPropertyPaths = [];
// for the save, soft-remove and recover operation
// extract all property paths of the relations we need to load relation ids for
// this is for optimization purpose - this way we don't load relation ids for entities
// whose relations are undefined, and since they are undefined its really pointless to
// load something for them, since undefined properties are skipped by the orm
if (operationType === "save" || operationType === "soft-remove" || operationType === "recover") {
subjectGroup.subjects.forEach(function (subject) {
// gets all relation property paths that exist in the persisted entity.
subject.metadata.relations.forEach(function (relation) {
var value = relation.getEntityValue(subject.entityWithFulfilledIds);
if (value === undefined)
return;
if (loadRelationPropertyPaths.indexOf(relation.propertyPath) === -1)
loadRelationPropertyPaths.push(relation.propertyPath);
});
});
}
else { // remove
// for remove operation
// we only need to load junction relation ids since only they are removed by cascades
loadRelationPropertyPaths.push.apply(// remove
loadRelationPropertyPaths, __spreadArray([], __read(subjectGroup.subjects[0].metadata.manyToManyRelations.map(function (relation) { return relation.propertyPath; }))));
}
findOptions = {
loadEagerRelations: false,
loadRelationIds: {
relations: loadRelationPropertyPaths,
disableMixedMap: true
},
// the soft-deleted entities should be included in the loaded entities for recover operation
withDeleted: true
};
return [4 /*yield*/, this.queryRunner.manager
.getRepository(subjectGroup.target)
.findByIds(allIds, findOptions)];
case 1:
entities = _b.sent();
// now when we have entities we need to find subject of each entity
// and insert that entity into database entity of the found subjects
entities.forEach(function (entity) {
var subjects = _this.findByPersistEntityLike(subjectGroup.target, entity);
subjects.forEach(function (subject) {
subject.databaseEntity = entity;
if (!subject.identifier)
subject.identifier = subject.metadata.hasAllPrimaryKeys(entity) ? subject.metadata.getEntityIdMap(entity) : undefined;
});
});
try {
// this way we tell what subjects we tried to load database entities of
for (allSubjects_1 = __values(allSubjects), allSubjects_1_1 = allSubjects_1.next(); !allSubjects_1_1.done; allSubjects_1_1 = allSubjects_1.next()) {
subject = allSubjects_1_1.value;
subject.databaseEntityLoaded = true;
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (allSubjects_1_1 && !allSubjects_1_1.done && (_a = allSubjects_1.return)) _a.call(allSubjects_1);
}
finally { if (e_1) throw e_1.error; }
}
return [2 /*return*/];
}
});
}); });
return [4 /*yield*/, Promise.all(promises)];
case 1:
_a.sent();
return [2 /*return*/];
}
});
});
};
// ---------------------------------------------------------------------
// Protected Methods
// ---------------------------------------------------------------------
/**
* Finds subjects where entity like given subject's entity.
* Comparision made by entity id.
* Multiple subjects may be returned if duplicates are present in the subject array.
* This will likely result in the same row being updated multiple times during a transaction.
*/
SubjectDatabaseEntityLoader.prototype.findByPersistEntityLike = function (entityTarget, entity) {
return this.subjects.filter(function (subject) {
if (!subject.entity)
return false;
if (subject.entity === entity)
return true;
return subject.metadata.target === entityTarget && subject.metadata.compareEntities(subject.entityWithFulfilledIds, entity);
});
};
/**
* Groups given Subject objects into groups separated by entity targets.
*/
SubjectDatabaseEntityLoader.prototype.groupByEntityTargets = function () {
return this.subjects.reduce(function (groups, operatedEntity) {
var group = groups.find(function (group) { return group.target === operatedEntity.metadata.target; });
if (!group) {
group = { target: operatedEntity.metadata.target, subjects: [] };
groups.push(group);
}
group.subjects.push(operatedEntity);
return groups;
}, []);
};
return SubjectDatabaseEntityLoader;
}());
export { SubjectDatabaseEntityLoader };
//# sourceMappingURL=SubjectDatabaseEntityLoader.js.map