CodeIgniter：登录用户详细信息未正确插入

Question

请帮我插入代码在facebook和google登录用户详细信息中无法正常工作

下面是我的模型函数

#facebook插入代码..

public function checkUser($data = array()){
    $this->db->select('*');
    $this->db->where('id', $this->primaryKey);
    $this->db->from($this->tablename);
    $this->db->where(array('oauth_provider'=>$data['oauth_provider'],'oauth_uid'=>$data['oauth_uid']));
    $prevQuery = $this->db->get();
    $prevCheck = $prevQuery->num_rows();

    if($prevCheck > 0){
        $prevResult = $prevQuery->row_array();
        $data['modified'] = date("Y-m-d H:i:s");
        $update = $this->db->update($this->tablename,$data,array('id'=>$prevResult['id']));
        $userID = $prevResult['id'];
    }else{
        $data['created'] = date("Y-m-d H:i:s");
        $data['modified'] = date("Y-m-d H:i:s");
        $insert = $this->db->insert($this->tablename,$data);
        $userID = $this->db->insert_id();
    }

    return $userID?$userID:FALSE;
}

This function insert twice and if oauth_uid already exists then it again insert I want if exists then only update  

***#google insert code..***
public function google_checkUser($data = array()){
    $this->db->select($this->primaryKey);
    $this->db->from($this->tablename);
    $this->db->where(array('oauth_provider'=>$data['oauth_provider'],'oauth_uid'=>$data['oauth_uid']));
    $prevQuery = $this->db->get();
    $prevCheck = $prevQuery->num_rows();

    if($prevCheck > 0){
        $prevResult = $prevQuery->row_array();
        $data['modified'] = date("Y-m-d H:i:s");
        $update = $this->db->update($this->tablename,$data,array('id'=>$prevResult['id']));
        $userID = $prevResult['id'];
    }else{
        $data['created'] = date("Y-m-d H:i:s");
        $data['modified'] = date("Y-m-d H:i:s");
        $insert = $this->db->insert($this->tablename,$data);
        $userID = $this->db->insert_id();
    }

    return $userID?$userID:FALSE;
}

这很有效，但是当我更新电子邮件时，它会更多时间插入Facebook代码4请帮助解决此问题