Java 按_id更新一个文档(无效的BSON字段名_id)
我正在尝试使用Java 按_id更新一个文档(无效的BSON字段名_id),java,mongodb,Java,Mongodb,我正在尝试使用updateOne方法更新文档: UpdateResult r = coll.updateOne( eq("_id", id), this.getMapper().mapToMongoDocumentEntry(entity) ); 尽管如此,我还是得到了一个例外,告诉我: 无效的BSON字段名\u id mapToMongoDocumentEntity返回一个文档如下: Document{ _id=588b0d7108980f004323ca73, us
updateOne
方法更新文档:
UpdateResult r = coll.updateOne(
eq("_id", id),
this.getMapper().mapToMongoDocumentEntry(entity)
);
尽管如此,我还是得到了一个例外,告诉我:
无效的BSON字段名\u id
mapToMongoDocumentEntity
返回一个文档
如下:
Document{
_id=588b0d7108980f004323ca73,
username=user,
password=.---,
cname=----,
sname=,
mail=mail,
creation=Fri Jan 27 09:05:52 UTC 2017,
validation=null
}
mapToMongoDocumentEntry
code:
public Document mapToMongoDocumentEntry(User entity) {
Document result = new Document();
if (entity.getId() != null)
result.put(UserEntityMongoDocumentMapper.FIELD_ID, new ObjectId(entity.getId()));
result.put(UserEntityMongoDocumentMapper.FIELD_USER, entity.getUser());
result.put(UserEntityMongoDocumentMapper.FIELD_PASSWORD, entity.getPasswd());
result.put(UserEntityMongoDocumentMapper.FIELD_COMMONNAME, entity.getCname());
result.put(UserEntityMongoDocumentMapper.FIELD_SURNAME, entity.getSname());
result.put(UserEntityMongoDocumentMapper.FIELD_MAIL, entity.getMail());
result.put(UserEntityMongoDocumentMapper.FIELD_CREATION, entity.getCreation());
result.put(UserEntityMongoDocumentMapper.FIELD_VALIDATION, entity.getValidation());
return result;
}
有什么想法吗
/**
* Replace a document in the collection according to the specified arguments.
*
* @param filter the query filter to apply the the replace operation
* @param replacement the replacement document
* @return the result of the replace one operation
* @throws com.mongodb.MongoWriteException if the write failed due some other failure specific to the replace command
* @throws com.mongodb.MongoWriteConcernException if the write failed due being unable to fulfil the write concern
* @throws com.mongodb.MongoException if the write failed due some other failure
* @mongodb.driver.manual tutorial/modify-documents/#replace-the-document Replace
*/
UpdateResult replaceOne(Bson filter, TDocument replacement);
对你来说应该比
/**
* Update a single document in the collection according to the specified arguments.
*
* @param filter a document describing the query filter, which may not be null.
* @param update a document describing the update, which may not be null. The update to apply must include only update operators.
* @return the result of the update one operation
* @throws com.mongodb.MongoWriteException if the write failed due some other failure specific to the update command
* @throws com.mongodb.MongoWriteConcernException if the write failed due being unable to fulfil the write concern
* @throws com.mongodb.MongoException if the write failed due some other failure
* @mongodb.driver.manual tutorial/modify-documents/ Updates
* @mongodb.driver.manual reference/operator/update/ Update Operators
*/
UpdateResult updateOne(Bson filter, Bson update);
我分享文件的原因是为了引出两条重要条款:
updateOne
readds-要应用的更新必须只包括更新运算符,并且您最好不要更新现有文档的\u id
,如果您在MapTomogoDocumentEntry
方法中生成该文档,则最好将其替换为一个maptomongocumententry
返回的是整个文档,而不仅仅是属性,因此您实际上需要的是整个文档替换,而不是更新它的字段另外,请注意,您可以使用上述两种方法,其中重载了一个额外的参数,该参数可以提供对文档
upsert
、pass
等的支持。您可以发布实体代码吗,请?我还添加了MaptomongocumentEntity
代码。如果您的MaptomongocumentEntry
返回整个文档
,那么replaceOne(Bson筛选器,t文档替换)
是否对您有帮助?它现在已经工作了。这是updateOne
和replaceOne
之间的区别?非常有用的答案。直到你把它并排展示出来,我才明白更新和替换之间的区别。