SQL_Model::insert PHP Method

    private function insert()
    {
        $insert = $this->dsql();
        // Performs the actual database changes. Throw exception if problem occurs
        foreach ($this->elements as $name => $f) {
            if ($f instanceof Field) {
                if (!$f->editable() && !$f->system()) {
                    continue;
                }
                if (!isset($this->dirty[$name]) && $f->defaultValue() === null) {
                    continue;
                }
                $f->updateInsertQuery($insert);
            }
        }
        $this->hook('beforeInsert', array(&$insert));
        //delayed is not supported by INNODB, but what's worse - it shows error.
        //if($this->_save_as===false)$insert->option_insert('delayed');
        $id = $insert->insert();
        if ($id == 0) {
            // no auto-increment column present
            $id = $this->get($this->id_field);
            if ($id === null && $this->_save_as !== false) {
                throw $this->exception('Please add auto-increment ID column to your table or specify ID manually');
            }
        }
        $res = $this->hook('afterInsert', array($id));
        if ($res === false) {
            return $this;
        }
        if ($this->_save_as === false) {
            return $this->unload();
        }
        if ($this->_save_as) {
            $this->unload();
        }
        $o = $this->_save_as ?: $this;
        if ($this->fast && !$this->_save_as) {
            $this[$this->id_field] = $this->id = $id;
            return $this;
        }
        $res = $o->tryLoad($id);
        if (!$res->loaded()) {
            throw $this->exception('Saved model did not match conditions. Save aborted.');
        }
        return $res;
    }