bool set_fields_if_equals(uint32_t do_id, const map<DCField*, vector<uint8_t> > &equals,
map<DCField*, vector<uint8_t> > &values)
{
// Get class from the objects table
DCClass* dcc = get_class(do_id);
if(!dcc)
{
return false; // Object does not exist
}
bool stored = is_storable(dcc->get_number());
if(!stored)
{
return false; // Class has no database fields
}
bool failed = false;
string value;
indicator ind;
vector<DCField*> null_fields;
try
{
m_sql.begin(); // Start transaction
for(auto it = equals.begin(); it != equals.end(); ++it)
{
DCField* field = it->first;
if(field->is_db())
{
m_sql << "SELECT " << field->get_name() << " FROM fields_" << dcc->get_name()
<< " WHERE object_id=" << do_id << ";", into(value, ind);
if(ind != i_ok)
{
null_fields.push_back(field);
failed = true;
continue;
}
string packed_equal(it->second.begin(), it->second.end());
string equal = field->format_data(packed_equal, false);
if(value == equal)
{
string packed_data(values[field].begin(), values[field].end());
string insert = field->format_data(packed_data, false);
m_sql << "UPDATE fields_" << dcc->get_name() << " SET " << field->get_name()
<< "='" << insert << "' WHERE object_id=" << do_id << ";";
\
}
else
{
failed = true;
}
value = field->parse_string(value);
values[field] = vector<uint8_t>(value.begin(), value.end());
}
}
if(failed)
{
for(auto it = null_fields.begin(); it != null_fields.end(); ++it)
{
values.erase(*it);
}
m_sql.rollback(); // Revert transaction
return false;
}
else
{
m_sql.commit(); // End transaction
return true;
}
}
catch(const exception &e)
{
m_sql.rollback(); // Revert transaction
values.clear();
return false;
}
}
