/// <summary>
/// 根据查询条件，返回一个查询对象。一般用于参数化查询。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="condition">查询条件</param>
/// <returns>返回查询对象xQuery，可以进一步参数化赋值，并得到结果</returns>
public static xQuery <T> find <T>(String condition) where T : IEntity
{
ObjectInfo state = new ObjectInfo(typeof(T));
Query q = ObjectDb.Find(state, condition);
return(new xQuery <T>(q));
}
// The persistence layer will scope data it saves to the player. This is done on the server side
// and is transparent to the client. This is a convenience feature for prototyping and development. Do
// not use this in a production app.
// **IMPORTANT**
// Please note that this is still not completely secure, as a hacked client can still write out data
// you are not expecting and there is no way to validate the data before saving it (other then the scoping). Any server logic that
// you write that depends on data saved using this feature is WRONG. Do not do that. You have been warned.
void Start()
{
//Setup. The following 3 steps are required for peristence to work
// 1. Find the ObjectDb actor. It is started automatically by the actor system
ObjectDb db = ActorSystem.Instance.Find("ObjectDb") as ObjectDb;
// 2. Set the callback to receive objects from the server
ObjectDb.ObjectReceived callback = OnObjectReceived;
db.OnObjectReceived(callback);
// 3. Set the player id
db.SetPlayerId(User.Instance.username);
// Saving and retrieving entities
Entity entity = new Entity();
entity.id = "dbtest";
db.Save(entity);
db.Find(entity.id);
// If you want to save arbitrary binary data, you must wrap it in a NativeBytes message and attach that
// message to the entity you are saving.
// Simple byte array to use as a test
string str = "Howdy";
byte[] bytes = new byte[str.Length * sizeof(char)];
System.Buffer.BlockCopy(str.ToCharArray(), 0, bytes, 0, bytes.Length);
// Wrap the byte array and save it
NativeBytes nativeBytes = new NativeBytes();
nativeBytes.bytes = bytes;
entity.nativeBytes = nativeBytes;
entity.id = "native_bytes_test";
db.Save(entity);
db.Find(entity.id);
}
public static IList FindDataOther(Type throughType, Type t, String order, int id)
{
// 1029
ObjectInfo state = new ObjectInfo(throughType);
String relationPropertyName = state.EntityInfo.GetRelationPropertyName(t);
EntityPropertyInfo info = state.EntityInfo.FindRelationProperty(t);
state.Order = order;
state.include(info.Name);
return(ObjectDb.Find(state, relationPropertyName + ".Id=" + id).listChildren(info.Name));
}
public static String GetSameTypeIds(Type throughType, Type t, int id)
{
// 1029
ObjectInfo state = new ObjectInfo(throughType);
String relationPropertyName = state.EntityInfo.GetRelationPropertyName(t);
EntityPropertyInfo info = state.EntityInfo.FindRelationProperty(t);
String ids = ObjectDb.Find(state, relationPropertyName + ".Id=" + id).get(info.Name + ".Id");
EntityPropertyInfo property = state.EntityInfo.GetProperty(relationPropertyName);
String sql = String.Format("select distinct {0} from {1} where {2} in ({3}) and {0}<>{4}", property.ColumnName, state.EntityInfo.TableName, info.ColumnName, ids, id);
IDbCommand command = DataFactory.GetCommand(sql, DbContext.getConnection(state.EntityInfo));
IDataReader rd = null;
StringBuilder builder = new StringBuilder();
try {
rd = command.ExecuteReader();
while (rd.Read())
{
builder.Append(rd[0]);
builder.Append(",");
}
}
catch (Exception exception) {
logger.Error(exception.Message);
throw exception;
}
finally
{
if (command.Connection.State != ConnectionState.Closed)
{
command.Connection.Close();
command.Connection.Dispose();
OrmHelper.clostCount++;
LogManager.GetLogger("Class:System.ORM.Operation.FindRelationOperation Method:GetSameTypeIds").Info("数据库连接已关闭【" + OrmHelper.clostCount + "】");
}
OrmHelper.CloseDataReader(rd);
}
return(builder.ToString().TrimEnd(','));
}
