typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
120 lines (118 loc) • 9.43 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.RelationCountLoader = void 0;
var tslib_1 = require("tslib");
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 tslib_1.__awaiter(this, void 0, void 0, function () {
var onlyUnique, promises;
var _this = this;
return tslib_1.__generator(this, function (_a) {
onlyUnique = function (value, index, self) {
return self.indexOf(value) === index;
};
promises = this.relationCountAttributes.map(function (relationCountAttr) { return tslib_1.__awaiter(_this, void 0, void 0, function () {
var relation, inverseRelation, referenceColumnName_1, inverseSideTable, inverseSideTableName, inverseSideTableAlias, inverseSidePropertyName, referenceColumnValues, qb, joinTableColumnName_1, inverseJoinColumnName, firstJunctionColumn, secondJunctionColumn, referenceColumnValues, junctionAlias, inverseSideTableName, inverseSideTableAlias, junctionTableName, condition, qb;
var _a, _b;
return tslib_1.__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; });
referenceColumnValues = referenceColumnValues.filter(onlyUnique);
// 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; });
referenceColumnValues = referenceColumnValues.filter(onlyUnique);
// 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.map(function (vals) { return isNaN(vals) ? "'" + vals + "'" : vals; }) + ")" +
" 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;
}());
exports.RelationCountLoader = RelationCountLoader;
//# sourceMappingURL=RelationCountLoader.js.map