fix: datetime shift

src/field.cpp

@@ -42,7 +42,7 @@ namespace coyote {
         }
     }
 
-    std::string Field::datetime() const { return yac_cget_field_datetime(_target_field_id); }
+    std::string Field::datetime() const { return _datetime; }
 
     bool Field::is_done() const { return _info == YAC_ACTION_OUT_OF_BOUND; }
     bool Field::is_ready() {
@@ -50,6 +50,7 @@ namespace coyote {
             if (!semaphore.try_acquire())
                 return false;
             int ierror = 0;
+            _datetime  = yac_cget_field_datetime(_target_field_id);
             yac_cget_async_(_target_field_id, _collection_size, _buffer.data(), &_info, &ierror);
             _get_started = true;
         }
@@ -59,6 +60,7 @@ namespace coyote {
             return false;
         yac_cget_action(_target_field_id, &_info);
         _get_started = false;
+        _datetime    = yac_cget_field_datetime(_target_field_id);
         return true;
     }
 

src/field.hpp

@@ -44,6 +44,7 @@ namespace coyote {
         size_t _point_size;
         int _info         = YAC_ACTION_NONE;
         bool _get_started = false;
+        std::string _datetime;
     };
 } // namespace coyote