typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, WebSQL, MongoDB databases.
239 lines (237 loc) • 12.3 kB
JavaScript
var __extends = (this && this.__extends) || (function () {
var extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
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 };
}
};
import { Repository } from "./Repository";
/**
* Repository with additional functions to work with trees.
*
* @see Repository
*/
var TreeRepository = /** @class */ (function (_super) {
__extends(TreeRepository, _super);
function TreeRepository() {
return _super !== null && _super.apply(this, arguments) || this;
}
// todo: implement moving
// todo: implement removing
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
/**
* Gets complete trees for all roots in the table.
*/
TreeRepository.prototype.findTrees = function () {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
var roots;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.findRoots()];
case 1:
roots = _a.sent();
return [4 /*yield*/, Promise.all(roots.map(function (root) { return __awaiter(_this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.findDescendantsTree(root)];
case 1:
_a.sent();
return [2 /*return*/];
}
});
}); }))];
case 2:
_a.sent();
return [2 /*return*/, roots];
}
});
});
};
/**
* Roots are entities that have no ancestors. Finds them all.
*/
TreeRepository.prototype.findRoots = function () {
var _this = this;
var escapeAlias = function (alias) { return _this.manager.connection.driver.escape(alias); };
var escapeColumn = function (column) { return _this.manager.connection.driver.escape(column); };
var parentPropertyName = this.manager.connection.namingStrategy.joinColumnName(this.metadata.treeParentRelation.propertyName, "id");
return this.createQueryBuilder("treeEntity")
.where(escapeAlias("treeEntity") + "." + escapeColumn(parentPropertyName) + " IS NULL")
.getMany();
};
/**
* Gets all children (descendants) of the given entity. Returns them all in a flat array.
*/
TreeRepository.prototype.findDescendants = function (entity) {
return this
.createDescendantsQueryBuilder("treeEntity", "treeClosure", entity)
.getMany();
};
/**
* Gets all children (descendants) of the given entity. Returns them in a tree - nested into each other.
*/
TreeRepository.prototype.findDescendantsTree = function (entity) {
var _this = this;
// todo: throw exception if there is no column of this relation?
return this
.createDescendantsQueryBuilder("treeEntity", "treeClosure", entity)
.getRawAndEntities()
.then(function (entitiesAndScalars) {
var relationMaps = _this.createRelationMaps("treeEntity", entitiesAndScalars.raw);
_this.buildChildrenEntityTree(entity, entitiesAndScalars.entities, relationMaps);
return entity;
});
};
/**
* Gets number of descendants of the entity.
*/
TreeRepository.prototype.countDescendants = function (entity) {
return this
.createDescendantsQueryBuilder("treeEntity", "treeClosure", entity)
.getCount();
};
/**
* Creates a query builder used to get descendants of the entities in a tree.
*/
TreeRepository.prototype.createDescendantsQueryBuilder = function (alias, closureTableAlias, entity) {
var _this = this;
// create shortcuts for better readability
var escape = function (alias) { return _this.manager.connection.driver.escape(alias); };
var joinCondition = escape(alias) + "." + escape(this.metadata.primaryColumns[0].databaseName) + "=" + escape(closureTableAlias) + "." + escape("descendant");
return this.createQueryBuilder(alias)
.innerJoin(this.metadata.closureJunctionTable.tableName, closureTableAlias, joinCondition)
.where(escape(closureTableAlias) + "." + escape("ancestor") + "=" + this.metadata.getEntityIdMap(entity)[this.metadata.primaryColumns[0].propertyName]);
};
/**
* Gets all parents (ancestors) of the given entity. Returns them all in a flat array.
*/
TreeRepository.prototype.findAncestors = function (entity) {
return this
.createAncestorsQueryBuilder("treeEntity", "treeClosure", entity)
.getMany();
};
/**
* Gets all parents (ancestors) of the given entity. Returns them in a tree - nested into each other.
*/
TreeRepository.prototype.findAncestorsTree = function (entity) {
var _this = this;
// todo: throw exception if there is no column of this relation?
return this
.createAncestorsQueryBuilder("treeEntity", "treeClosure", entity)
.getRawAndEntities()
.then(function (entitiesAndScalars) {
var relationMaps = _this.createRelationMaps("treeEntity", entitiesAndScalars.raw);
_this.buildParentEntityTree(entity, entitiesAndScalars.entities, relationMaps);
return entity;
});
};
/**
* Gets number of ancestors of the entity.
*/
TreeRepository.prototype.countAncestors = function (entity) {
return this
.createAncestorsQueryBuilder("treeEntity", "treeClosure", entity)
.getCount();
};
/**
* Creates a query builder used to get ancestors of the entities in the tree.
*/
TreeRepository.prototype.createAncestorsQueryBuilder = function (alias, closureTableAlias, entity) {
var _this = this;
// create shortcuts for better readability
var escapeAlias = function (alias) { return _this.manager.connection.driver.escape(alias); };
var escapeColumn = function (column) { return _this.manager.connection.driver.escape(column); };
var joinCondition = escapeAlias(alias) + "." + escapeColumn(this.metadata.primaryColumns[0].databaseName) + "=" + escapeAlias(closureTableAlias) + "." + escapeColumn("ancestor");
return this.createQueryBuilder(alias)
.innerJoin(this.metadata.closureJunctionTable.tableName, closureTableAlias, joinCondition)
.where(escapeAlias(closureTableAlias) + "." + escapeColumn("descendant") + "=" + this.metadata.getEntityIdMap(entity)[this.metadata.primaryColumns[0].propertyName]);
};
/**
* Moves entity to the children of then given entity.
*
move(entity: Entity, to: Entity): Promise<void> {
return Promise.resolve();
} */
// -------------------------------------------------------------------------
// Protected Methods
// -------------------------------------------------------------------------
TreeRepository.prototype.createRelationMaps = function (alias, rawResults) {
var _this = this;
return rawResults.map(function (rawResult) {
return {
id: rawResult[alias + "_" + _this.metadata.primaryColumns[0].databaseName],
parentId: rawResult[alias + "_" + _this.metadata.treeParentRelation.joinColumns[0].givenDatabaseName]
};
});
};
TreeRepository.prototype.buildChildrenEntityTree = function (entity, entities, relationMaps) {
var _this = this;
var childProperty = this.metadata.treeChildrenRelation.propertyName;
var parentEntityId = this.metadata.primaryColumns[0].getEntityValue(entity);
var childRelationMaps = relationMaps.filter(function (relationMap) { return relationMap.parentId === parentEntityId; });
var childIds = childRelationMaps.map(function (relationMap) { return relationMap.id; });
entity[childProperty] = entities.filter(function (entity) { return childIds.indexOf(entity.id) !== -1; });
entity[childProperty].forEach(function (childEntity) {
_this.buildChildrenEntityTree(childEntity, entities, relationMaps);
});
};
TreeRepository.prototype.buildParentEntityTree = function (entity, entities, relationMaps) {
var _this = this;
var parentProperty = this.metadata.treeParentRelation.propertyName;
var entityId = this.metadata.primaryColumns[0].getEntityValue(entity);
var parentRelationMap = relationMaps.find(function (relationMap) { return relationMap.id === entityId; });
var parentEntity = entities.find(function (entity) {
if (!parentRelationMap)
return false;
return entity[_this.metadata.primaryColumns[0].propertyName] === parentRelationMap.parentId;
});
if (parentEntity) {
entity[parentProperty] = parentEntity;
this.buildParentEntityTree(entity[parentProperty], entities, relationMaps);
}
};
return TreeRepository;
}(Repository));
export { TreeRepository };
//# sourceMappingURL=TreeRepository.js.map