import * as tslib_1 from "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, _a, joinTableColumnName_1, inverseJoinColumnName, firstJunctionColumn, secondJunctionColumn, referenceColumnValues, junctionAlias, inverseSideTableName, inverseSideTableAlias, junctionTableName, condition, qb, _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 + ")" +
|
" 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
|
