typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
175 lines (173 loc) • 10.8 kB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [0, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
/**
* 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 _this = this;
var promises;
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 _this = this;
var allIds, loadRelationPropertyPaths, findOptions, entities;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
allIds = [];
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);
});
// 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 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") {
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, subjectGroup.subjects[0].metadata.manyToManyRelations.map(function (relation) { return relation.propertyPath; }));
}
findOptions = {
loadEagerRelations: false,
loadRelationIds: {
relations: loadRelationPropertyPaths,
disableMixedMap: true
}
};
return [4 /*yield*/, this.queryRunner.manager
.getRepository(subjectGroup.target)
.findByIds(allIds, findOptions)];
case 1:
entities = _a.sent();
// now when we have entities we need to find subject of each entity
// and insert that entity into database entity of the found subject
entities.forEach(function (entity) {
var subject = _this.findByPersistEntityLike(subjectGroup.target, entity);
if (subject) {
subject.databaseEntity = entity;
if (!subject.identifier)
subject.identifier = subject.metadata.hasAllPrimaryKeys(entity) ? subject.metadata.getEntityIdMap(entity) : undefined;
}
});
return [2 /*return*/];
}
});
}); });
return [4 /*yield*/, Promise.all(promises)];
case 1:
_a.sent();
return [2 /*return*/];
}
});
});
};
// ---------------------------------------------------------------------
// Protected Methods
// ---------------------------------------------------------------------
/**
* Finds subject where entity like given subject's entity.
* Comparision made by entity id.
*/
SubjectDatabaseEntityLoader.prototype.findByPersistEntityLike = function (entityTarget, entity) {
return this.subjects.find(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