MojErr MojDb::getImpl(const MojObject& id, MojObjectVisitor& visitor, MojDbOp op, MojDbReq& req)
{
MojRefCountedPtr<MojDbStorageItem> item;
MojErr err = m_objDb->get(id, req.txn(), false, item);
MojErrCheck(err);
if (item.get()) {
MojString kindId;
err = item->kindId(kindId, m_kindEngine);
MojErrCheck(err);
err = m_kindEngine.checkPermission(kindId, op, req);
MojErrCheck(err);
err = item->visit(visitor, m_kindEngine);
MojErrCheck(err);
err = item->close();
MojErrCheck(err);
}
return MojErrNone;
}
MojErr MojDb::putImpl(MojObject& obj, MojUInt32 flags, MojDbReq& req, bool checkSchema)
{
MojLogTrace(s_log);
MojRefCountedPtr<MojDbStorageItem> prevItem;
MojObject id;
if (obj.get(IdKey, id)) {
// get previous revision if we have an id
MojErr err = m_objDb->get(id, req.txn(), true, prevItem);
MojErrCheck(err);
}
if (MojFlagGet(flags, FlagIgnoreMissing) && MojFlagGet(flags, FlagMerge)) {
if (!prevItem.get()) {
MojErr err = obj.putBool(MojDb::IgnoreIdKey, true); // so that we can drop it in output
MojErrCheck(err);
return MojErrNone;
}
}
MojDbOp op = OpCreate;
MojObject* prevPtr = NULL;
MojObject prev;
if (prevItem.get()) {
// deal with prev, if it exists
op = OpUpdate;
prevPtr = &prev;
MojErr err = prevItem->toObject(prev, m_kindEngine);
MojErrCheck(err);
if (MojFlagGet(flags, FlagMerge)) {
// do merge
MojObject merged;
err = mergeInto(merged, obj, prev);
MojErrCheck(err);
obj = merged;
} else if (!MojFlagGet(flags, FlagForce)) {
// if the force flag is not set, throw error if we are updating
// an existing, non-deleted object and no rev was specified
MojInt64 rev;
if (obj.get(RevKey, rev) == false) {
bool deleted = false;
if (!prev.get(DelKey, deleted) || !deleted)
MojErrThrow(MojErrDbRevNotSpecified);
}
}
}
// if the new object has a rev and it doesn't match the old rev, don't do the update
MojInt64 newRev;
if (prevPtr != NULL && obj.get(RevKey, newRev)) {
MojInt64 oldRev;
MojErr err = prevPtr->getRequired(RevKey, oldRev);
MojErrCheck(err);
if (!MojFlagGet(flags, FlagForce) && newRev != oldRev)
MojErrThrowMsg(MojErrDbRevisionMismatch, _T("db: revision mismatch - expected %lld, got %lld"), oldRev, newRev);
}
// save it
MojErr err = putObj(id, obj, prevPtr, prevItem.get(), req, op, checkSchema);
MojErrCheck(err);
if (prevItem.get()) {
err = prevItem->close();
MojErrCheck(err);
}
return MojErrNone;
}
