typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
200 lines (198 loc) • 14.7 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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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) {
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function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
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}
};
Object.defineProperty(exports, "__esModule", { value: true });
var StringUtils_1 = require("../../util/StringUtils");
var OracleDriver_1 = require("../../driver/oracle/OracleDriver");
var RelationIdLoader = /** @class */ (function () {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
function RelationIdLoader(connection, queryRunner, relationIdAttributes) {
this.connection = connection;
this.queryRunner = queryRunner;
this.relationIdAttributes = relationIdAttributes;
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
RelationIdLoader.prototype.load = function (rawEntities) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
var promises;
return __generator(this, function (_a) {
promises = this.relationIdAttributes.map(function (relationIdAttr) { return __awaiter(_this, void 0, void 0, function () {
var _this = this;
var results, relation, joinColumns_1, table, tableName, tableAlias_1, parameters_1, condition, qb_1, _a, relation, joinColumns_2, inverseJoinColumns, junctionAlias_1, inverseSideTableName, inverseSideTableAlias_1, junctionTableName, mappedColumns, parameters_2, joinColumnConditions, inverseJoinColumnCondition_1, condition, qb_2, _b;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
if (!(relationIdAttr.relation.isManyToOne || relationIdAttr.relation.isOneToOneOwner)) return [3 /*break*/, 1];
// example: Post and Tag
// loadRelationIdAndMap("post.tagId", "post.tag")
// we expect it to load id of tag
if (relationIdAttr.queryBuilderFactory)
throw new Error("Additional condition can not be used with ManyToOne or OneToOne owner relations.");
results = rawEntities.map(function (rawEntity) {
var result = {};
relationIdAttr.relation.joinColumns.forEach(function (joinColumn) {
result[joinColumn.databaseName] = rawEntity[_this.buildColumnAlias(relationIdAttr.parentAlias, joinColumn.databaseName)];
});
relationIdAttr.relation.entityMetadata.primaryColumns.forEach(function (primaryColumn) {
result[primaryColumn.databaseName] = rawEntity[_this.buildColumnAlias(relationIdAttr.parentAlias, primaryColumn.databaseName)];
});
return result;
});
return [2 /*return*/, {
relationIdAttribute: relationIdAttr,
results: results
}];
case 1:
if (!(relationIdAttr.relation.isOneToMany || relationIdAttr.relation.isOneToOneNotOwner)) return [3 /*break*/, 3];
relation = relationIdAttr.relation;
joinColumns_1 = relation.isOwning ? relation.joinColumns : relation.inverseRelation.joinColumns;
table = relation.inverseEntityMetadata.target;
tableName = relation.inverseEntityMetadata.tableName;
tableAlias_1 = relationIdAttr.alias || tableName;
parameters_1 = {};
condition = rawEntities.map(function (rawEntity, index) {
return joinColumns_1.map(function (joinColumn) {
var parameterName = joinColumn.databaseName + index;
parameters_1[parameterName] = rawEntity[_this.buildColumnAlias(relationIdAttr.parentAlias, joinColumn.referencedColumn.databaseName)];
return tableAlias_1 + "." + joinColumn.propertyPath + " = :" + parameterName;
}).join(" AND ");
}).map(function (condition) { return "(" + condition + ")"; })
.join(" OR ");
// 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 (!condition)
return [2 /*return*/, { relationIdAttribute: relationIdAttr, results: [] }];
qb_1 = this.connection.createQueryBuilder(this.queryRunner);
joinColumns_1.forEach(function (joinColumn) {
qb_1.addSelect(tableAlias_1 + "." + joinColumn.propertyPath, joinColumn.databaseName);
});
relation.inverseRelation.entityMetadata.primaryColumns.forEach(function (primaryColumn) {
qb_1.addSelect(tableAlias_1 + "." + primaryColumn.propertyPath, primaryColumn.databaseName);
});
qb_1.from(table, tableAlias_1)
.where("(" + condition + ")") // need brackets because if we have additional condition and no brackets, it looks like (a = 1) OR (a = 2) AND b = 1, that is incorrect
.setParameters(parameters_1);
// apply condition (custom query builder factory)
if (relationIdAttr.queryBuilderFactory)
relationIdAttr.queryBuilderFactory(qb_1);
_a = {
relationIdAttribute: relationIdAttr
};
return [4 /*yield*/, qb_1.getRawMany()];
case 2: return [2 /*return*/, (_a.results = _c.sent(),
_a)];
case 3:
relation = relationIdAttr.relation;
joinColumns_2 = relation.isOwning ? relation.joinColumns : relation.inverseRelation.inverseJoinColumns;
inverseJoinColumns = relation.isOwning ? relation.inverseJoinColumns : relation.inverseRelation.joinColumns;
junctionAlias_1 = relationIdAttr.junctionAlias;
inverseSideTableName = relationIdAttr.joinInverseSideMetadata.tableName;
inverseSideTableAlias_1 = relationIdAttr.alias || inverseSideTableName;
junctionTableName = relation.isOwning ? relation.junctionEntityMetadata.tableName : relation.inverseRelation.junctionEntityMetadata.tableName;
mappedColumns = rawEntities.map(function (rawEntity) {
return joinColumns_2.reduce(function (map, joinColumn) {
map[joinColumn.propertyPath] = rawEntity[_this.buildColumnAlias(relationIdAttr.parentAlias, joinColumn.referencedColumn.databaseName)];
return map;
}, {});
});
// 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 (mappedColumns.length === 0)
return [2 /*return*/, { relationIdAttribute: relationIdAttr, results: [] }];
parameters_2 = {};
joinColumnConditions = mappedColumns.map(function (mappedColumn, index) {
return Object.keys(mappedColumn).map(function (key) {
var parameterName = key + index;
parameters_2[parameterName] = mappedColumn[key];
return junctionAlias_1 + "." + key + " = :" + parameterName;
}).join(" AND ");
});
inverseJoinColumnCondition_1 = inverseJoinColumns.map(function (joinColumn) {
return junctionAlias_1 + "." + joinColumn.propertyPath + " = " + inverseSideTableAlias_1 + "." + joinColumn.referencedColumn.propertyPath;
}).join(" AND ");
condition = joinColumnConditions.map(function (condition) {
return "(" + condition + " AND " + inverseJoinColumnCondition_1 + ")";
}).join(" OR ");
qb_2 = this.connection.createQueryBuilder(this.queryRunner);
inverseJoinColumns.forEach(function (joinColumn) {
qb_2.addSelect(junctionAlias_1 + "." + joinColumn.propertyPath, joinColumn.databaseName)
.addOrderBy(junctionAlias_1 + "." + joinColumn.propertyPath);
});
joinColumns_2.forEach(function (joinColumn) {
qb_2.addSelect(junctionAlias_1 + "." + joinColumn.propertyPath, joinColumn.databaseName)
.addOrderBy(junctionAlias_1 + "." + joinColumn.propertyPath);
});
qb_2.from(inverseSideTableName, inverseSideTableAlias_1)
.innerJoin(junctionTableName, junctionAlias_1, condition)
.setParameters(parameters_2);
// apply condition (custom query builder factory)
if (relationIdAttr.queryBuilderFactory)
relationIdAttr.queryBuilderFactory(qb_2);
_b = {
relationIdAttribute: relationIdAttr
};
return [4 /*yield*/, qb_2.getRawMany()];
case 4: return [2 /*return*/, (_b.results = _c.sent(),
_b)];
}
});
}); });
return [2 /*return*/, Promise.all(promises)];
});
});
};
// -------------------------------------------------------------------------
// Protected Methods
// -------------------------------------------------------------------------
/**
* Builds column alias from given alias name and column name,
* If alias length is more than 29, abbreviates column name.
*/
RelationIdLoader.prototype.buildColumnAlias = function (aliasName, columnName) {
var columnAliasName = aliasName + "_" + columnName;
if (columnAliasName.length > 29 && this.connection.driver instanceof OracleDriver_1.OracleDriver)
return aliasName + "_" + StringUtils_1.abbreviate(columnName, 2);
return columnAliasName;
};
return RelationIdLoader;
}());
exports.RelationIdLoader = RelationIdLoader;
//# sourceMappingURL=RelationIdLoader.js.map