本文整理汇总了C++中database::remove方法的典型用法代码示例。如果您正苦于以下问题：C++ database::remove方法的具体用法？C++ database::remove怎么用？C++ database::remove使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类database的用法示例。
在下文中一共展示了database::remove方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: debug_apply_update
void debug_apply_update( database& db, const fc::variant_object& vo )
{
static const uint8_t
db_action_nil = 0,
db_action_create = 1,
db_action_write = 2,
db_action_update = 3,
db_action_delete = 4;
// "_action" : "create" object must not exist, unspecified fields take defaults
// "_action" : "write" object may exist, is replaced entirely, unspecified fields take defaults
// "_action" : "update" object must exist, unspecified fields don't change
// "_action" : "delete" object must exist, will be deleted
// if _action is unspecified:
// - delete if object contains only ID field
// - otherwise, write
object_id_type oid;
uint8_t action = db_action_nil;
auto it_id = vo.find("id");
FC_ASSERT( it_id != vo.end() );
from_variant( it_id->value(), oid );
action = ( vo.size() == 1 ) ? db_action_delete : db_action_write;
from_variant( vo["id"], oid );
if( vo.size() == 1 )
action = db_action_delete;
auto it_action = vo.find("_action" );
if( it_action != vo.end() )
{
const std::string& str_action = it_action->value().get_string();
if( str_action == "create" )
action = db_action_create;
else if( str_action == "write" )
action = db_action_write;
else if( str_action == "update" )
action = db_action_update;
else if( str_action == "delete" )
action = db_action_delete;
}
auto& idx = db.get_index( oid );
switch( action )
{
case db_action_create:
FC_ASSERT( false );
break;
case db_action_write:
db.modify( db.get_object( oid ), [&]( object& obj )
{
idx.object_default( obj );
idx.object_from_variant( vo, obj, GRAPHENE_MAX_NESTED_OBJECTS );
} );
break;
case db_action_update:
db.modify( db.get_object( oid ), [&]( object& obj )
{
idx.object_from_variant( vo, obj, GRAPHENE_MAX_NESTED_OBJECTS );
} );
break;
case db_action_delete:
db.remove( db.get_object( oid ) );
break;
default:
FC_ASSERT( false );
}
}