typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
139 lines (137 loc) • 6.83 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.PlainObjectToDatabaseEntityTransformer = void 0;
var tslib_1 = require("tslib");
/**
*/
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: false,
configurable: true
});
Object.defineProperty(LoadMapItem.prototype, "id", {
get: function () {
return this.metadata.getEntityIdMixedMap(this.plainEntity);
},
enumerable: false,
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: false,
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 tslib_1.__awaiter(this, void 0, void 0, function () {
var loadMap, fillLoadMap;
var _this = this;
return tslib_1.__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 _b = tslib_1.__read(_a, 3), relation = _b[0], value = _b[1], inverseEntityMetadata = _b[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