typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
145 lines (143 loc) • 11.1 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 };
}
};
var RelationCountLoader = /** @class */ (function () {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
function RelationCountLoader(connection, queryRunner, relationCountAttributes) {
this.connection = connection;
this.queryRunner = queryRunner;
this.relationCountAttributes = relationCountAttributes;
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
RelationCountLoader.prototype.load = function (rawEntities) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
var promises;
return __generator(this, function (_a) {
promises = this.relationCountAttributes.map(function (relationCountAttr) { return __awaiter(_this, void 0, void 0, function () {
var relation, inverseRelation, referenceColumnName_1, inverseSideTable, inverseSideTableName, inverseSideTableAlias, inverseSidePropertyName, referenceColumnValues, qb, _a, joinTableColumnName_1, inverseJoinColumnName, firstJunctionColumn, secondJunctionColumn, referenceColumnValues, junctionAlias, inverseSideTableName, inverseSideTableAlias, junctionTableName, condition, qb, _b;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
if (!relationCountAttr.relation.isOneToMany) return [3 /*break*/, 2];
relation = relationCountAttr.relation;
inverseRelation = relation.inverseRelation;
referenceColumnName_1 = inverseRelation.joinColumns[0].referencedColumn.propertyName;
inverseSideTable = relation.inverseEntityMetadata.target;
inverseSideTableName = relation.inverseEntityMetadata.tableName;
inverseSideTableAlias = relationCountAttr.alias || inverseSideTableName;
inverseSidePropertyName = inverseRelation.propertyName;
referenceColumnValues = rawEntities
.map(function (rawEntity) { return rawEntity[relationCountAttr.parentAlias + "_" + referenceColumnName_1]; })
.filter(function (value) { return !!value; });
// ensure we won't perform redundant queries for joined data which was not found in selection
// example: if post.category was not found in db then no need to execute query for category.imageIds
if (referenceColumnValues.length === 0)
return [2 /*return*/, { relationCountAttribute: relationCountAttr, results: [] }];
qb = this.connection.createQueryBuilder(this.queryRunner);
qb.select(inverseSideTableAlias + "." + inverseSidePropertyName, "parentId")
.addSelect("COUNT(*)", "cnt")
.from(inverseSideTable, inverseSideTableAlias)
.where(inverseSideTableAlias + "." + inverseSidePropertyName + " IN (:...ids)")
.addGroupBy(inverseSideTableAlias + "." + inverseSidePropertyName)
.setParameter("ids", referenceColumnValues);
// apply condition (custom query builder factory)
if (relationCountAttr.queryBuilderFactory)
relationCountAttr.queryBuilderFactory(qb);
_a = {
relationCountAttribute: relationCountAttr
};
return [4 /*yield*/, qb.getRawMany()];
case 1: return [2 /*return*/, (_a.results = _c.sent(),
_a)];
case 2:
inverseJoinColumnName = void 0;
firstJunctionColumn = void 0;
secondJunctionColumn = void 0;
if (relationCountAttr.relation.isOwning) { // todo fix joinColumns[0] and inverseJoinColumns[0].
joinTableColumnName_1 = relationCountAttr.relation.joinColumns[0].referencedColumn.databaseName;
inverseJoinColumnName = relationCountAttr.relation.inverseJoinColumns[0].referencedColumn.databaseName;
firstJunctionColumn = relationCountAttr.relation.junctionEntityMetadata.columns[0];
secondJunctionColumn = relationCountAttr.relation.junctionEntityMetadata.columns[1];
}
else {
joinTableColumnName_1 = relationCountAttr.relation.inverseRelation.inverseJoinColumns[0].referencedColumn.databaseName;
inverseJoinColumnName = relationCountAttr.relation.inverseRelation.joinColumns[0].referencedColumn.databaseName;
firstJunctionColumn = relationCountAttr.relation.junctionEntityMetadata.columns[1];
secondJunctionColumn = relationCountAttr.relation.junctionEntityMetadata.columns[0];
}
referenceColumnValues = rawEntities
.map(function (rawEntity) { return rawEntity[relationCountAttr.parentAlias + "_" + joinTableColumnName_1]; })
.filter(function (value) { return value; });
// ensure we won't perform redundant queries for joined data which was not found in selection
// example: if post.category was not found in db then no need to execute query for category.imageIds
if (referenceColumnValues.length === 0)
return [2 /*return*/, { relationCountAttribute: relationCountAttr, results: [] }];
junctionAlias = relationCountAttr.junctionAlias;
inverseSideTableName = relationCountAttr.joinInverseSideMetadata.tableName;
inverseSideTableAlias = relationCountAttr.alias || inverseSideTableName;
junctionTableName = relationCountAttr.relation.junctionEntityMetadata.tableName;
condition = junctionAlias + "." + firstJunctionColumn.propertyName + " IN (" + referenceColumnValues + ")" +
" AND " + junctionAlias + "." + secondJunctionColumn.propertyName + " = " + inverseSideTableAlias + "." + inverseJoinColumnName;
qb = this.connection.createQueryBuilder(this.queryRunner);
qb.select(junctionAlias + "." + firstJunctionColumn.propertyName, "parentId")
.addSelect("COUNT(" + qb.escape(inverseSideTableAlias) + "." + qb.escape(inverseJoinColumnName) + ")", "cnt")
.from(inverseSideTableName, inverseSideTableAlias)
.innerJoin(junctionTableName, junctionAlias, condition)
.addGroupBy(junctionAlias + "." + firstJunctionColumn.propertyName);
// apply condition (custom query builder factory)
if (relationCountAttr.queryBuilderFactory)
relationCountAttr.queryBuilderFactory(qb);
_b = {
relationCountAttribute: relationCountAttr
};
return [4 /*yield*/, qb.getRawMany()];
case 3: return [2 /*return*/, (_b.results = _c.sent(),
_b)];
}
});
}); });
return [2 /*return*/, Promise.all(promises)];
});
});
};
return RelationCountLoader;
}());
export { RelationCountLoader };
//# sourceMappingURL=RelationCountLoader.js.map