我使用scala驱动程序与mongodb进行IO操作。我的scala版本是2.11.11,mongo db驱动程序是2.2.0。
我以文档中关于ADT的例子为例:
sealed class Tree
case class Branch(b1: Tree, b2: Tree, value: Int) extends Tree
case class Leaf(value: Int) extends Tree
val codecRegistry = fromRegistries( fromProviders(classOf[Tree]), DEFAULT_CODEC_REGISTRY )
这段代码
我有一个类包含一个可空字段:
public class User {
@BsonId
public ObjectId _id;
// Nullable
public String wechat_unionid;
// Nullable
public String wework_userid;
}
我使用mongodb驱动程序的默认POJO,它将忽略null属性,但我需要该属性为null并存在,否则它将无法通过模式验证。
文件:
上面写着:
默认情况下,值不序列化。这是由FieldSerialization接口的默认实现控制的。可以在PropertyModelBuilde
我试图使用 api将记录依赖于数据类型插入到mongodb。
让我们先来看看数据类型:
sealed trait MsgDoc {
}
final case class MsgPreFailure(raw: String, reasons: Chain[String]) extends MsgDoc
final case class MsgProceed(raw: String, status: MsgStatus) extends MsgDoc
sealed trait MsgStatus {
}
case object Msg
我试图在Mongo Java Driver 3.6中使用新的ChangeStream特性,但是我被卡住了。这是我的错误:
ChangeStreamDocument contains generic types that have not been specialised.
Top level classes with generic types are not supported by the PojoCodec.
下面是我如何启动changeStream的方法:
CodecRegistry pojoCodecRegistry = fromRegistries(MongoClient.getD
我使用这个编解码器来序列化和反序列化POJO,使用4.3/driver-reactive http://mongodb.github.io/mongo-java-driver/4.3/driver-reactive/getting-started/quick-start-pojo/ @Singleton
public record Repository(MongodbConfiguration mongodbConfiguration) implements IRepository {
@Override
public <T> MongoCollection<
#!/bin/bash
declare -a gpu_array=("rtx3060", "rtx3070", "rtx3080", "rtx3090", "rx6700")
#host = "http://192.168.1.31:5000/"
for gpu in ${gpu_array[*]}; do
gpu_url = $"http://192.168.1.31:5000/$gpu"
value = $(curl "${gpu_url}")
K=[30,15,25,50,40,35,44,49,55,54]
Search = int(input("enter the value you want to search"))
Index=0
Found=False
while Index<=9 and Found==False:
if K[Index]==Search:
print("Match found")
Found=True
else:
print("Match not found")
I
我要区分“页面未找到”和“资源未找到”错误。是否有可能获得异常类型来执行以下操作?
def render("404.json", assigns) do
case assigns[:reason] do
NoRouteErro -> message = "Route not found"
Ecto.NoResultsError -> message = "Resource not found"
_ -> message = "Uncaught exception"
end
Co