本文整理了Java中org.mongodb.morphia.Datastore.updateFirst()方法的一些代码示例，展示了Datastore.updateFirst()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Datastore.updateFirst()方法的具体详情如下：
包路径：org.mongodb.morphia.Datastore
类名称：Datastore
方法名：updateFirst

Datastore.updateFirst介绍

[英]updates the first entity found using the entity as a template, if nothing is found insert the update as an entity if "createIfMissing" is true. If the entity is a versioned entity, an UnsupportedOperationException is thrown.
[中]

代码示例

代码示例来源：origin: stackoverflow.com

public boolean checkIfExistsAndInsertOtherwise(short id){
 Datastore datastore = getDatastore();
 Query<OrganizationId> updateQuery = datastore.createQuery(OrganizationId.class).field("identificationNumber").equal(id);
 //Bogus operation, just set id to itself
 UpdateOperations<OrganizationId> ops = datastore.createUpdateOperations(OrganizationId.class).set("identificationNumber", id);
 UpdateResults<OrganizationId> result = datastore.updateFirst(updateQuery, ops, true,WriteConcern.SAFE);
 return result.getInsertedCount() == 0;
}

代码示例来源：origin: protegeproject/webprotege

public Optional<EntityDiscussionThread> setThreadStatus(@Nonnull ThreadId threadId,
                            @Nonnull Status status) {
  datastore.updateFirst(createQueryForThread(threadId), getUpdateOperations().set(STATUS, status));
  return Optional.ofNullable(datastore.get(EntityDiscussionThread.class, threadId));
}

代码示例来源：origin: stackoverflow.com

Datastore ds = ...;

//get/change/save
Settings s = ds.find(Settings.class).get(); //like findOne in the shell/driver
s.showFriendsList = true;
ds.save(s); 

//or update
ds.updateFirst(ds.find(Settings.class), ds.creatUpdateOperations(Settings.class).set("showFiendsList", true));

代码示例来源：origin: protegeproject/webprotege

public boolean deleteComment(CommentId commentId) {
  Query<EntityDiscussionThread> query = datastore.createQuery(EntityDiscussionThread.class)
                          .field(COMMENTS_ID).equal(commentId);
  UpdateOperations<EntityDiscussionThread> update = getUpdateOperations()
      .removeAll(COMMENTS, new BasicDBObject("_id", commentId.getId()));
  UpdateResults updateResults = datastore.updateFirst(query, update);
  return updateResults.getUpdatedCount() == 1;
}

代码示例来源：origin: protegeproject/webprotege

public void updateComment(ThreadId id, Comment comment) {
  Query<EntityDiscussionThread> query = createQueryForThread(id)
      .field(COMMENTS_ID).equal(comment.getId());
  UpdateOperations<EntityDiscussionThread> update = getUpdateOperations()
      .set(MATCHED_COMMENT_PATH, comment);
  datastore.updateFirst(query, update);
}