typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
172 lines (170 loc) • 9.04 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 };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
/**
*/
var LoadMapItem = /** @class */ (function () {
function LoadMapItem(plainEntity, metadata, parentLoadMapItem, relation) {
this.plainEntity = plainEntity;
this.metadata = metadata;
this.parentLoadMapItem = parentLoadMapItem;
this.relation = relation;
}
Object.defineProperty(LoadMapItem.prototype, "target", {
get: function () {
return this.metadata.target;
},
enumerable: true,
configurable: true
});
Object.defineProperty(LoadMapItem.prototype, "id", {
get: function () {
return this.metadata.getEntityIdMixedMap(this.plainEntity);
},
enumerable: true,
configurable: true
});
return LoadMapItem;
}());
var LoadMap = /** @class */ (function () {
function LoadMap() {
this.loadMapItems = [];
}
Object.defineProperty(LoadMap.prototype, "mainLoadMapItem", {
get: function () {
return this.loadMapItems.find(function (item) { return !item.relation && !item.parentLoadMapItem; });
},
enumerable: true,
configurable: true
});
LoadMap.prototype.addLoadMap = function (newLoadMap) {
var item = this.loadMapItems.find(function (item) { return item.target === newLoadMap.target && item.id === newLoadMap.id; });
if (!item)
this.loadMapItems.push(newLoadMap);
};
LoadMap.prototype.fillEntities = function (target, entities) {
var _this = this;
entities.forEach(function (entity) {
var item = _this.loadMapItems.find(function (loadMapItem) {
return loadMapItem.target === target && loadMapItem.metadata.compareEntities(entity, loadMapItem.plainEntity);
});
if (item)
item.entity = entity;
});
};
LoadMap.prototype.groupByTargetIds = function () {
var groups = [];
this.loadMapItems.forEach(function (loadMapItem) {
var group = groups.find(function (group) { return group.target === loadMapItem.target; });
if (!group) {
group = { target: loadMapItem.target, ids: [] };
groups.push(group);
}
group.ids.push(loadMapItem.id);
});
return groups;
};
return LoadMap;
}());
/**
* Transforms plain old javascript object
* Entity is constructed based on its entity metadata.
*/
var PlainObjectToDatabaseEntityTransformer = /** @class */ (function () {
function PlainObjectToDatabaseEntityTransformer(manager) {
this.manager = manager;
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
PlainObjectToDatabaseEntityTransformer.prototype.transform = function (plainObject, metadata) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
var loadMap, fillLoadMap;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
// if plain object does not have id then nothing to load really
if (!metadata.hasAllPrimaryKeys(plainObject))
return [2 /*return*/, Promise.reject("Given object does not have a primary column, cannot transform it to database entity.")];
loadMap = new LoadMap();
fillLoadMap = function (entity, entityMetadata, parentLoadMapItem, relation) {
var item = new LoadMapItem(entity, entityMetadata, parentLoadMapItem, relation);
loadMap.addLoadMap(item);
entityMetadata
.extractRelationValuesFromEntity(entity, metadata.relations)
.filter(function (value) { return value !== null && value !== undefined; })
.forEach(function (_a) {
var relation = _a[0], value = _a[1], inverseEntityMetadata = _a[2];
return fillLoadMap(value, inverseEntityMetadata, item, relation);
});
};
fillLoadMap(plainObject, metadata);
// load all entities and store them in the load map
return [4 /*yield*/, Promise.all(loadMap.groupByTargetIds().map(function (targetWithIds) {
return _this.manager
.findByIds(targetWithIds.target, targetWithIds.ids)
.then(function (entities) { return loadMap.fillEntities(targetWithIds.target, entities); });
}))];
case 1:
// load all entities and store them in the load map
_a.sent();
// go through each item in the load map and set their entity relationship using metadata stored in load map
loadMap.loadMapItems.forEach(function (loadMapItem) {
if (!loadMapItem.relation ||
!loadMapItem.entity ||
!loadMapItem.parentLoadMapItem ||
!loadMapItem.parentLoadMapItem.entity)
return;
if (loadMapItem.relation.isManyToMany || loadMapItem.relation.isOneToMany) {
if (!loadMapItem.parentLoadMapItem.entity[loadMapItem.relation.propertyName])
loadMapItem.parentLoadMapItem.entity[loadMapItem.relation.propertyName] = [];
loadMapItem.parentLoadMapItem.entity[loadMapItem.relation.propertyName].push(loadMapItem.entity);
}
else {
loadMapItem.parentLoadMapItem.entity[loadMapItem.relation.propertyName] = loadMapItem.entity;
}
});
return [2 /*return*/, loadMap.mainLoadMapItem ? loadMap.mainLoadMapItem.entity : undefined];
}
});
});
};
return PlainObjectToDatabaseEntityTransformer;
}());
exports.PlainObjectToDatabaseEntityTransformer = PlainObjectToDatabaseEntityTransformer;
//# sourceMappingURL=PlainObjectToDatabaseEntityTransformer.js.map