| 1 | 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{QueryBuilder} from \"./QueryBuilder\";\nimport {ObjectLiteral} from \"../common/ObjectLiteral\";\nimport {QueryExpressionMap} from \"./QueryExpressionMap\";\nimport {OracleDriver} from \"../driver/oracle/OracleDriver\";\n\n/**\n * Allows to work with entity relations and perform specific operations with those relations.\n *\n * todo: add transactions everywhere\n */\nexport class RelationUpdater {\n\n // -------------------------------------------------------------------------\n // Constructor\n // -------------------------------------------------------------------------\n\n constructor(protected queryBuilder: QueryBuilder<any>,\n protected expressionMap: QueryExpressionMap) {\n }\n\n // -------------------------------------------------------------------------\n // Public Methods\n // -------------------------------------------------------------------------\n\n /**\n * Performs set or add operation on a relation.\n */\n async update(value: any|any[]): Promise<void> {\n const relation = this.expressionMap.relationMetadata;\n\n if (relation.isManyToOne || relation.isOneToOneOwner) {\n\n const updateSet = relation.joinColumns.reduce((updateSet, joinColumn) => {\n const relationValue = value instanceof Object ? joinColumn.referencedColumn!.getEntityValue(value) : value;\n joinColumn.setEntityValue(updateSet, relationValue);\n return updateSet;\n }, {} as any);\n\n if (!this.expressionMap.of || (this.expressionMap.of instanceof Array && !this.expressionMap.of.length)) return;\n\n await this.queryBuilder\n .createQueryBuilder()\n .update(relation.entityMetadata.target)\n .set(updateSet)\n .whereInIds(this.expressionMap.of)\n .execute();\n\n } else if ((relation.isOneToOneNotOwner || relation.isOneToMany) && value === null) { // we handle null a bit different way\n\n const updateSet: ObjectLiteral = {};\n relation.inverseRelation!.joinColumns.forEach(column => {\n updateSet[column.propertyName] = null;\n });\n\n const ofs = this.expressionMap.of instanceof Array ? this.expressionMap.of : [this.expressionMap.of];\n const parameters: ObjectLiteral = {};\n const conditions: string[] = [];\n ofs.forEach((of, ofIndex) => {\n relation.inverseRelation!.joinColumns.map((column, columnIndex) => {\n const parameterName = \"joinColumn_\" + ofIndex + \"_\" + columnIndex;\n parameters[parameterName] = of instanceof Object ? column.referencedColumn!.getEntityValue(of) : of;\n conditions.push(`${column.propertyPath} = :${parameterName}`);\n });\n });\n const condition = conditions.map(str => \"(\" + str + \")\").join(\" OR \");\n if (!condition) return;\n\n await this.queryBuilder\n .createQueryBuilder()\n .update(relation.inverseEntityMetadata.target)\n .set(updateSet)\n .where(condition)\n .setParameters(parameters)\n .execute();\n\n } else if (relation.isOneToOneNotOwner || relation.isOneToMany) {\n\n if (this.expressionMap.of instanceof Array)\n throw new Error(`You cannot update relations of multiple entities with the same related object. Provide a single entity into .of method.`);\n\n const of = this.expressionMap.of;\n const updateSet = relation.inverseRelation!.joinColumns.reduce((updateSet, joinColumn) => {\n const relationValue = of instanceof Object ? joinColumn.referencedColumn!.getEntityValue(of) : of;\n joinColumn.setEntityValue(updateSet, relationValue);\n return updateSet;\n }, {} as any);\n\n if (!value || (value instanceof Array && !value.length)) return;\n\n await this.queryBuilder\n .createQueryBuilder()\n .update(relation.inverseEntityMetadata.target)\n .set(updateSet)\n .whereInIds(value)\n .execute();\n\n } else { // many to many\n const junctionMetadata = relation.junctionEntityMetadata!;\n const ofs = this.expressionMap.of instanceof Array ? this.expressionMap.of : [this.expressionMap.of];\n const values = value instanceof Array ? value : [value];\n const firstColumnValues = relation.isManyToManyOwner ? ofs : values;\n const secondColumnValues = relation.isManyToManyOwner ? values : ofs;\n\n const bulkInserted: ObjectLiteral[] = [];\n firstColumnValues.forEach(firstColumnVal => {\n secondColumnValues.forEach(secondColumnVal => {\n const inserted: ObjectLiteral = {};\n junctionMetadata.ownerColumns.forEach(column => {\n inserted[column.databaseName] = firstColumnVal instanceof Object ? column.referencedColumn!.getEntityValue(firstColumnVal) : firstColumnVal;\n });\n junctionMetadata.inverseColumns.forEach(column => {\n inserted[column.databaseName] = secondColumnVal instanceof Object ? column.referencedColumn!.getEntityValue(secondColumnVal) : secondColumnVal;\n });\n bulkInserted.push(inserted);\n });\n });\n\n if (!bulkInserted.length) return;\n\n if (this.queryBuilder.connection.driver instanceof OracleDriver) {\n await Promise.all(bulkInserted.map(value => {\n return this.queryBuilder\n .createQueryBuilder()\n .insert()\n .into(junctionMetadata.tableName)\n .values(value)\n .execute();\n }));\n } else {\n await this.queryBuilder\n .createQueryBuilder()\n .insert()\n .into(junctionMetadata.tableName)\n .values(bulkInserted)\n .execute();\n }\n }\n }\n\n}"],"sourceRoot":".."} |