����������� ���� https://docs.mongodb.org/manual/core/aggregation-introduction/� ���� mapReduce ���� MapReduce ����� ���� export default class extends think.controller.base { async indexAction(){ 'A'}}, {$group: {_id: "$cust_id", total: {$sum: "$amount"}}} ]); } } JavaScript MapReduce ���� https://docs.mongodb.org/manual/core/aggregation-introduction/#map-reduce� ThinkJS ����� } let reduce = (key, values) => { return Array.sum(values); } return this.mapReduce(map, reduce, { query: {status: "A"}, out: "order_totals" }) } } JavaScript

the data structure in a more fundamental way. For those cases, the SelectQuery object offers the mapReduce() method, which is a way of processing results once they are fetched from the database. A common structure is grouping results together based on certain conditions. For this task we can use the mapReduce() function. We need two callable functions the $mapper and the $reducer. The $mapper callable receives as second argument and finally it receives an instance of the MapReduce routine it is running: $mapper = function ($article, $key, $mapReduce) { $status = 'published'; if ($article->isDraft() ||

the data structure in a more fundamental way. For those cases, the SelectQuery object offers the mapReduce() method, which is a way of processing results once they are fetched from the database. A common structure is grouping results together based on certain conditions. For this task we can use the mapReduce() function. We need two callable functions the $mapper and the $reducer. The $mapper callable receives an instance of the MapReduce routine it is running: 418 Chapter 12. Database Access & ORM CakePHP Cookbook Documentation, Release 5.x $mapper = function ($article, $key, $mapReduce) { $status = 'published';

is deprecated. Use getResultFormatters() instead. The getter part of Cake\Datasource\QueryTrait::mapReduce() is deprecated. Use getMapReducers() instead. The getter part of Cake\ORM\Query::contain() is deprecated change the data structure in a more fundamental way. For those cases, the Query object offers the mapReduce() method, which is a way of processing results once they are fetched from the database. A common structure is grouping results together based on certain conditions. For this task we can use the mapReduce() function. We need two callable functions the $mapper and the $reducer. The $mapper callable receives

deprecated. Use getResultFormatters() instead. • The getter part of Cake\Datasource\QueryTrait::mapReduce() is deprecated. Use getMapReducers() instead. • The getter part of Cake\ORM\Query::contain() is change the data structure in a more fundamental way. For those cases, the Query object offers the mapReduce() method, which is a way of processing results once they are fetched from the database. A common structure is grouping results together based on certain conditions. For this task we can use the mapReduce() function. We need two callable functions the $mapper and the $reducer. The $mapper callable receives

change the data structure in a more fundamental way. For those cases, the Query object offers the mapReduce() method, which is a way of processing results once they are fetched from the database. A common structure is grouping results together based on certain conditions. For this task we can use the mapReduce() function. We need two callable functions the $mapper and the $reducer. The $mapper callable receives as second argument and finally it receives an instance of the MapReduce routine it is running: $mapper = function ($article, $key, $mapReduce) { $status = 'published'; if ($article->isDraft() ||

change the data structure in a more fundamental way. For those cases, the Query object offers the mapReduce() method, which is a way of processing results once they are fetched from the database. A common structure is grouping results together based on certain conditions. For this task we can use the mapReduce() function. We need two callable functions the $mapper and the $reducer. The $mapper callable receives as second argument and finally it receives an instance of the MapReduce routine it is running: $mapper = function ($article, $key, $mapReduce) { $status = 'published'; if ($article->isDraft() || $article->isInReview())

Details stay at https://docs.mongodb.org/manual/core/aggregation-introduction/. Use mapReduce method to do MapReduce operations: Details stay at https://docs.mongodb.org/manual/core/aggregation-introduction/#map-reduce "A"}}, {$group: {_id: "$cust_id", total: {$sum: "$amount"}}} ]); } } JavaScript MapReduce export default class extends think.model.mongo { execMapReduce(){ let map = () => { } let reduce = (key, values) => { return Array.sum(values); } return this.mapReduce(map, reduce, { query: {status: "A"}, out: "order_totals" }) } } JavaScript

Details stay at https://docs.mongodb.org/manual/core/aggregation-introduction/. Use mapReduce method to do MapReduce operations: Details stay at https://docs.mongodb.org/manual/core/aggregation-introduction/#map-reduce "A"}}, {$group: {_id: "$cust_id", total: {$sum: "$amount"}}} ]); } } JavaScript MapReduce export default class extends think.model.mongo { execMapReduce(){ let map = () => { } let reduce = (key, values) => { return Array.sum(values); } return this.mapReduce(map, reduce, { query: {status: "A"}, out: "order_totals" }) } } JavaScript

Details stay at https://docs.mongodb.org/manual/core/aggregation-introduction/. Use mapReduce method to do MapReduce operations: export default class extends think.model.mongo { execMapReduce(){ } let reduce = (key, values) => { return Array.sum(values); } return this.mapReduce(map, reduce, { query: {status: "A"}, out: "order_totals" }) } } Details } } Use file need to set the path of SQLite data, default is src/common/runtime/sqlite . MapReduce SQLite Config Store Type Memory File JavaScript JavaScript JavaScript JavaScript export