谁能指出我正确的方向？我找到了一个在表格中显示 sql 结果的 codeigniter 教程，如下所示：
public function results() {
$query = $this->db->query("SELECT * FROM fuel"
. "ORDER BY date DESC");
return $this->table->generate($query);
}
效果很好！但现在我正在搜索一个解释添加编辑和删除按钮的教程，所以我可以更新记录和删除记录（以及如何添加记录）
我发现了这个：更新数据 CI 我应该把这段代码放在哪里？在模型、视图或控制器中？以及如何在我的表中的每一行中获取这些更新和删除链接？
我已经从 CI 中搜索了 tuts，他们解释了什么是表单助手和一个 mysql 助手、表助手，但对我帮助最大的是一个工作脚本，它已经准备好并可以正常工作。
有人可以指出一个很好的展示工作脚本的教程吗？
我找到的教程解释了如何在没有 mysql 的情况下创建表单
我已经在 CodeIgniter Structure 中编写了一个供我个人使用的通用模型。我已经涵盖了可能需要用于数据操作的所有方法。
将以下代码复制到模型目录中的 general_model.php 中...
class General_model extends CI_Model
{
private $_table;
private $_fields;
public $fields;
function __construct()
{
// Call the Model constructor
parent::__construct();
}
/**
* Set table name
* @access public
* @param string - sets table_name
* @return null
* @author Rajnish Savaliya
*/
function set_table($table_name)
{
$this->_table = $table_name;
$this->_fields = $this->db->list_fields($this->_table);
foreach($this->_fields as $field) {
$this->fields[$field] = "";
}
}
/**
* Get record from tables
* @access public
* @return array()
* @author Rajnish Savaliya
*/
function get_fields_array()
{
return $this->_fields;
}
/**
* Get record from table
* @access public
* @param number - sets limit
* @param number - sets offset
* @param array - sets order
* @author Rajnish Savaliya
* @return array()
*/
function get($select = array(),$conditions = array(),$order=array(),$limit=NULL,$offset=NULL)
{
$this->db->select($select)->from($this->_table)->where($conditions);
if($order)
$this->db->order_by(key($order),$order[key($order)]);
if($limit && $offset)
$this->db->limit($limit,$offset);
elseif($limit)
$this->db->limit($limit);
$query = $this->db->get();
return $query->result_array();
}
/**
* GET [copy] Get record from table
* @access public
* @param number - sets limit
* @param number - sets offset
* @param array - sets order
* @author Rajnish Savaliya
* @return stdClass()
*/
function get_stdClass($select = array(),$conditions = array(),$order=array(),$limit=NULL,$offset=NULL)
{
$this->db->select($select)->from($this->_table)->where($conditions);
if($order)
$this->db->order_by(key($order),$order[key($order)]);
if($limit && $offset)
$this->db->limit($limit,$offset);
elseif($limit)
$this->db->limit($limit);
$query = $this->db->get();
return $query->result();
}
/**
* Advance Get Function
* @access public
* @param number - select values
* @param number - sets limit
* @param number - sets offset
* @param array - sets order
* @param array - sets groupby
* @author Rajnish Savaliya
* @return array()
*/
function advance_get($select = array(),$conditions = array(),$order=array(),$groupby='',$limit=NULL,$offset=NULL)
{
$this->db->select($select)->from($this->_table)->where($conditions);
if($order)
$this->db->order_by(key($order),$order[key($order)]);
if($groupby != ''){
$this->db->group_by($groupby);
}
$this->db->limit($limit,$offset);
$query = $this->db->get();
return $query->result_array();
}
/**
* Get record by id from table
* @access public
* @param number - sets limit
* @param number - sets offset
* @param array - sets order
* @author Rajnish Savaliya
* @return array()
*/
function get_by_id($id,$order=array("id"=>"ASC"),$limit='1',$offset=NULL)
{
$this->db->where("id",$id);
$this->db->from($this->_table)->order_by(key($order),$order[key($order)])->limit($limit,$offset);
$query = $this->db->get();
return $query->result_array();
}
/**
* Save record in table
* @access public
* @param array -
* @return insert id
* @author Rajnish Savaliya
*/
function save($data,$password = NULL,$created = NULL)
{
if(!empty($data))
{
//if password field exist then
if($password != NULL)
{
$data[$password] = md5($data[$password]);
}
if($created != NULL)
{
$data[$created] = date('Y-m-d H:i:s');
}
$data = elements($this->_fields,$data);
$this->db->insert($this->_table, $data);
return $this->db->insert_id();
}
return false;
}
/**
* Save batch record in table
* @access public
* @param array - all combine data
* @return insert id
* @author Rajnish Savaliya
*/
public function saveBatch($collection){
$this->db->insert_batch($this->_table, $collection);
return $this->db->insert_id();
}
/**
* Update record in table
* @access public
* @param array - task data
* @param array - field name & value
* @return boolean
* @author Rajnish Savaliya
*/
function update($data,$fieldValue = array())
{
if(!empty($data) && !empty($fieldValue))
{
$this->db->where($fieldValue);
$this->db->update($this->_table,$data);
if($this->db->affected_rows() > 0)
return true;
else
return false;
}
return false;
}
/**
* Delete record in table
* @access public
* @param array - field name & value
* @return boolean
* @author Rajnish Savaliya
*/
function delete($fieldValue = array())
{
if(!empty($fieldValue))
{
$this->db->delete($this->_table,$fieldValue);
if($this->db->affected_rows() > 0)
return true;
else
return false;
}
return false;
}
/**
* Delete record in table
* @access public
* @param array - field name & value
* @return boolean
* @author Rajnish Savaliya
*/
function delete_multiple($where_in = array(), $fieldName)
{
if(!empty($where_in))
{
$this->db->where_in($fieldName,$where_in);
$this->db->delete($this->_table);
if($this->db->affected_rows() > 0)
return true;
else
return false;
}
return false;
}
/**
* Delete record in table
* @access public
* @param array - field name & value
* @return boolean
* @author Rajnish Savaliya
*/
function update_multiple($data,$where_in = array(), $fieldName)
{
if(!empty($where_in))
{
$this->db->where_in($fieldName,$where_in);
$this->db->update($this->_table,$data);
if($this->db->affected_rows() > 0)
return true;
else
return false;
}
return false;
}
/**
* Get Field or Fields By Id
* @access public
* @param string - field name
* @param number - field id
* @return boolean
* @author Rajnish Savaliya
*/
function get_fields($field_names = NULL , $id = NULL)
{
if($field_names != NULL && $id != NULL)
{
$this->db->select($field_names)->from($this->_table)->where('id',$id);
$query = $this->db->get();
$record = $query->result_array();
if(!empty($record))
{
if(count(explode(",", $field_names)) > 1)
return $record[0];
else
return $record[0][$field_names];
}
return "";
}
return "";
}
/**
* Join Two Table
* @access public
* @param array - result
* @return stdClass
* @author Rajnish Savaliya
*/
public function singleJoin($parentTable,$childTable,$select,$condition,$where=array()){
$this->db->select($select);
$this->db->from($parentTable);
$this->db->where($where);
$this->db->join($childTable,$condition);
return $this->db->get()->result_array();
}
/**
* Join Two or More Table : mulitple joins with multiple where condition and multiple like condition
* @access public
* @param array - result
* @return stdClass - result
* @author Rajnish Savaliya
*/
public function multijoins($fields,$from,$joins,$where,$ordersby='',$action=NULL,$likes=NULL,$num=NULL,$offset=NULL,$wheretype='where',$groupby=''){
$this->db->select($fields);
if($wheretype == 'where'){
$this->db->where($where);
}
if($wheretype == 'where_in'){
$this->db->where($where);
}
if($groupby != ''){
$this->db->group_by($groupby);
}
foreach($joins as $key => $value){
$this->db->join($key, $value[0], $value[1]);
}
if($likes != NULL){
foreach($likes as $field =>$like){
$this->db->like($field, $like);
}
}
if($ordersby != ''){
$this->db->order_by(''.$ordersby.'');
}
if($action == 'count'){
return $this->db->get($from)->num_rows();
}
elseif($action == 'array'){
return $this->db->get($from,$num,$offset)->result_array();
}
else{
return $this->db->get($from,$num,$offset)->result();
}
}
/**
* Join Two or More Table : mulitple joins with multiple where condition and multiple like condition
* @access public
* @param array - result
* @return ArrayObject - result
* @author Rajnish Savaliya
*/
public function multijoins_arr($fields,$from,$joins,$where,$custom_where=NULL,$ordersby='',$num=NULL,$offset=NULL,$action='',$wheretype='where',$groupby=''){
$this->db->select($fields);
if($wheretype == 'where'){
$this->db->where($where);
}
if($wheretype == 'where_in'){
/*$field = implode(",",(array_keys($where)));
$this->db->where_in(''.$field.'', $where['p.products_id']);*/
$this->db->where($where);
}
if($groupby != ''){
$this->db->group_by($groupby);
}
foreach($joins as $key => $value){
$this->db->join($key, $value[0], $value[1]);
}
if($custom_where != NULL){
$this->db->where($custom_where);
}
if($ordersby != ''){
$this->db->order_by(''.$ordersby.'');
}
if($action == 'count'){
return $this->db->get($from,$num,$offset)->num_rows();
}else{
return $this->db->get($from,$num,$offset)->result_array();
}
}
/**
* Function give next/ successor id from calculating ids.
* @access public
* @param array - result
* @return id
* @author Rajnish Savaliya
*/
public function getNextId($tableName,$id='id',$alias='')
{
if($alias == '')
{
$alias = $id;
}
$this->db->select_max($id,$alias);
$query = $this->db->get($tableName);
$result = $query->result_array();
return $result['0'][$alias]+1;
}
/**
* Function check record is exist or not.
* @access public
* @param array - result
* @return boolean true if have dublicate record and false doen't dublicate record
* @author Rajnish Savaliya
*/
public function checkDuplicate($condition,$table=''){
if($table == '')
$table = $this->_table;
$query = $this->db->get_where($table,$condition);
if($query->num_rows()>=1){
return true;
}else{
return false;
}
}
/**
* Count Number of record from table
* @access public
* @Optional = table name
* @author Rajnish Savaliya
* @return array()
*/
function count_record($condition,$table='')
{
if($table == '')
$table = $this->_table;
$query = $this->db->get_where($table,$condition);
return $query->num_rows();
}
/**
* Count Number of record from table
* @access public
* @Optional = table name
* @author Rajnish Savaliya
* @return array()
*/
function custom_get($select,$condition = '')
{
$sql = "SELECT ".$select." FROM ".$this->_table;
if($condition != '')
$sql .= " Where ".$condition;
$query = $this->db->query($sql);
return $query->result_array();
}
/**
* Retrive all categories from database with tree structure
* @access public
* @author Pratik Patel
* @modified By Rajnish Savaliya
* @return array()
*/
public function get_all_categories()
{
$refs = array();
$list = array();
$sql = "SELECT iid, cat_code,parent_cat_code, category_name FROM category ";
$result = mysql_query($sql);
while($data = @mysql_fetch_assoc($result)) {
$thisref = &$refs[ $data['cat_code'] ];
$thisref['iid'] = $data['iid'];
$thisref['cat_code'] = $data['cat_code'];
//$thisref['parent_cat_code'] = $data['parent_cat_code'];
$thisref['category_name'] = $data['category_name'];
if ($data['parent_cat_code'] == 0) {
$thisref['type'] = 'folder';
$list[ $data['cat_code'] ] = &$thisref;
} else {
$thisref['type'] = 'item';
$refs[ $data['parent_cat_code'] ]['additionalParameters']['children'][ $data['cat_code'] ] = &$thisref;
}
}
return $list;
}
}
如何使用这个模型
使用很简单。。
负载型号：
$this->load->model("general_model",'general');
设置表执行操作：
$this->general->set_table('category');
设定条件
$condition = array();
设置额外的字段，如 orderby、limit、offset 更多信息，您可以在模型函数“get()”中看到
$ordersby['parent_tag_id'] = 'desc';
抓住结果！！
$results = $this->general->get("id,name",$condition,$ordersby);