更新或創建如果不存在蒙戈3.0.4

Question

我有低於數據結構集合

{ "Shop": "123", "date": "28-05-2015", "Points": { "a": "1", "b": "2", "c": "3" } }

這裏店鋪和日期唯一索引，並且沒有id是存在的，除了_id， 所以，如果我想只更新b的值，如果記錄匹配（基於帳戶和日期）不存在，則應該創建與b的值具有相同結構的新記錄。 最重要的部分是它的批量操作意味着我需要每天爲所有商店創建/更新記錄，並且這些記錄將每天爲每個商店創建。因此，如果記錄不存在，則更新點，而不是創建它，更新現有記錄。我正在使用spring。 我嘗試使用upsert true進行更新，但它並未更新，而是僅更新值創建新記錄。並且更新多個商店並更新了最新點的最佳方法是什麼。

Answer 1

//search a document that doesn't exist 
Query query = new Query(); 
query.addCriteria(Criteria.where("points.b").is("some value")); 

Update update = new Update(); 
update.set("b", some value); 
update.set..... //set all needed fields else they go as null 

mongoOperation.upsert(query, update, Shop.class); 

Shop shopTestObj = mongoOperation.findOne(query, Shop.class); 
System.out.println("shopTestObj - " + shopTestObj); 

在批量操作的情況下

// Sample code 
com.mongodb.DBCollection collection = db.getCollection("shop"); 

// Get BulkWriteOperation by accessing the mongodb com.mongodb.DBCollection class on mycol //Collection 

BulkWriteOperation bulkWriteOperation= collection.initializeUnorderedBulkOperation(); 

//perform the upsert operation in the loop to add objects for bulk execution 
for (int i=0;i<100;i++) 
{ 
// get a bulkWriteRequestBuilder by issuing find on the shop with _id 
BulkWriteRequestBuilder bulkWriteRequestBuilder=bulkWriteOperation.find(new BasicDBObject('_id',Integer.valueOf(i))); 

// get hold of upsert operation from bulkWriteRequestBuilder 
BulkUpdateRequestBuilder updateReq=    bulkWriteRequestBuilder?.upsert() 

updateReq. replaceOne (new BasicDBObject("_id",Integer.valueOf(i)).append("points.b", "some value")); 

} 
// execute bulk operation on shop collection 
BulkWriteResult result=bulkWriteOperation.execute();