"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var tslib_1 = require("tslib");
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var RelationCountLoader = /** @class */ (function () {
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// -------------------------------------------------------------------------
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// Constructor
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// -------------------------------------------------------------------------
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function RelationCountLoader(connection, queryRunner, relationCountAttributes) {
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this.connection = connection;
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this.queryRunner = queryRunner;
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this.relationCountAttributes = relationCountAttributes;
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}
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// -------------------------------------------------------------------------
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// Public Methods
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// -------------------------------------------------------------------------
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RelationCountLoader.prototype.load = function (rawEntities) {
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return tslib_1.__awaiter(this, void 0, void 0, function () {
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var onlyUnique, promises;
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var _this = this;
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return tslib_1.__generator(this, function (_a) {
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onlyUnique = function (value, index, self) {
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return self.indexOf(value) === index;
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};
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promises = this.relationCountAttributes.map(function (relationCountAttr) { return tslib_1.__awaiter(_this, void 0, void 0, function () {
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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;
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return tslib_1.__generator(this, function (_c) {
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switch (_c.label) {
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case 0:
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if (!relationCountAttr.relation.isOneToMany) return [3 /*break*/, 2];
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relation = relationCountAttr.relation;
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inverseRelation = relation.inverseRelation;
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referenceColumnName_1 = inverseRelation.joinColumns[0].referencedColumn.propertyName;
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inverseSideTable = relation.inverseEntityMetadata.target;
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inverseSideTableName = relation.inverseEntityMetadata.tableName;
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inverseSideTableAlias = relationCountAttr.alias || inverseSideTableName;
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inverseSidePropertyName = inverseRelation.propertyName;
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referenceColumnValues = rawEntities
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.map(function (rawEntity) { return rawEntity[relationCountAttr.parentAlias + "_" + referenceColumnName_1]; })
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.filter(function (value) { return !!value; });
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referenceColumnValues = referenceColumnValues.filter(onlyUnique);
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// ensure we won't perform redundant queries for joined data which was not found in selection
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// example: if post.category was not found in db then no need to execute query for category.imageIds
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if (referenceColumnValues.length === 0)
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return [2 /*return*/, { relationCountAttribute: relationCountAttr, results: [] }];
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qb = this.connection.createQueryBuilder(this.queryRunner);
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qb.select(inverseSideTableAlias + "." + inverseSidePropertyName, "parentId")
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.addSelect("COUNT(*)", "cnt")
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.from(inverseSideTable, inverseSideTableAlias)
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.where(inverseSideTableAlias + "." + inverseSidePropertyName + " IN (:...ids)")
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.addGroupBy(inverseSideTableAlias + "." + inverseSidePropertyName)
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.setParameter("ids", referenceColumnValues);
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// apply condition (custom query builder factory)
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if (relationCountAttr.queryBuilderFactory)
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relationCountAttr.queryBuilderFactory(qb);
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_a = {
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relationCountAttribute: relationCountAttr
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};
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return [4 /*yield*/, qb.getRawMany()];
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case 1: return [2 /*return*/, (_a.results = _c.sent(),
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_a)];
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case 2:
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inverseJoinColumnName = void 0;
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firstJunctionColumn = void 0;
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secondJunctionColumn = void 0;
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if (relationCountAttr.relation.isOwning) { // todo fix joinColumns[0] and inverseJoinColumns[0].
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joinTableColumnName_1 = relationCountAttr.relation.joinColumns[0].referencedColumn.databaseName;
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inverseJoinColumnName = relationCountAttr.relation.inverseJoinColumns[0].referencedColumn.databaseName;
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firstJunctionColumn = relationCountAttr.relation.junctionEntityMetadata.columns[0];
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secondJunctionColumn = relationCountAttr.relation.junctionEntityMetadata.columns[1];
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}
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else {
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joinTableColumnName_1 = relationCountAttr.relation.inverseRelation.inverseJoinColumns[0].referencedColumn.databaseName;
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inverseJoinColumnName = relationCountAttr.relation.inverseRelation.joinColumns[0].referencedColumn.databaseName;
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firstJunctionColumn = relationCountAttr.relation.junctionEntityMetadata.columns[1];
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secondJunctionColumn = relationCountAttr.relation.junctionEntityMetadata.columns[0];
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}
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referenceColumnValues = rawEntities
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.map(function (rawEntity) { return rawEntity[relationCountAttr.parentAlias + "_" + joinTableColumnName_1]; })
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.filter(function (value) { return !!value; });
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referenceColumnValues = referenceColumnValues.filter(onlyUnique);
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// ensure we won't perform redundant queries for joined data which was not found in selection
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// example: if post.category was not found in db then no need to execute query for category.imageIds
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if (referenceColumnValues.length === 0)
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return [2 /*return*/, { relationCountAttribute: relationCountAttr, results: [] }];
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junctionAlias = relationCountAttr.junctionAlias;
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inverseSideTableName = relationCountAttr.joinInverseSideMetadata.tableName;
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inverseSideTableAlias = relationCountAttr.alias || inverseSideTableName;
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junctionTableName = relationCountAttr.relation.junctionEntityMetadata.tableName;
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condition = junctionAlias + "." + firstJunctionColumn.propertyName + " IN (" + referenceColumnValues + ")" +
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" AND " + junctionAlias + "." + secondJunctionColumn.propertyName + " = " + inverseSideTableAlias + "." + inverseJoinColumnName;
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qb = this.connection.createQueryBuilder(this.queryRunner);
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qb.select(junctionAlias + "." + firstJunctionColumn.propertyName, "parentId")
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.addSelect("COUNT(" + qb.escape(inverseSideTableAlias) + "." + qb.escape(inverseJoinColumnName) + ")", "cnt")
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.from(inverseSideTableName, inverseSideTableAlias)
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.innerJoin(junctionTableName, junctionAlias, condition)
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.addGroupBy(junctionAlias + "." + firstJunctionColumn.propertyName);
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// apply condition (custom query builder factory)
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if (relationCountAttr.queryBuilderFactory)
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relationCountAttr.queryBuilderFactory(qb);
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_b = {
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relationCountAttribute: relationCountAttr
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};
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return [4 /*yield*/, qb.getRawMany()];
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case 3: return [2 /*return*/, (_b.results = _c.sent(),
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_b)];
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}
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});
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}); });
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return [2 /*return*/, Promise.all(promises)];
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});
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});
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};
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return RelationCountLoader;
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}());
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exports.RelationCountLoader = RelationCountLoader;
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//# sourceMappingURL=RelationCountLoader.js.map
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