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Model 层中的部分代码
1 /** 2 * CI 中的 AR 操作 3 * @author zhaoyingnan 4 **/ 5 public function mAR() 6 { 7 /*************** 查询 *************/ 8 //select * from mp4ba limit 21,10; 9 //$objResult = $this->db->get(‘mp4ba‘, 10, 21); 10 //echo $this->db->last_query();die; 11 12 13 //select * from mp4ba where id =32 limit 21,10; 14 //select * from mp4ba where id =32 and name = ‘刺客聂隐娘‘limit 21,10; 15 //$objResult = $this->db->get_where(‘mp4ba‘, array(‘id‘=>32), 10, 21); 16 //echo $this->db->last_query();die; 17 //$objResult = $this->db->get_where(‘mp4ba‘, array(‘id‘=>32,‘name‘=>‘刺客聂隐娘‘), 10, 21); 18 //echo $this->db->last_query();die; 19 20 21 //select id,name,url from mp4ba where id =32; 22 //$objResult = $this->db->select(‘id,name,url‘)->get_where(‘mp4ba‘, array(‘id‘=>32)); 23 //echo $this->db->last_query();die; 24 25 //select id,name,url from mp4ba where id =32 or id=39; 26 //$objResult = $this->db->select(‘id,name,url‘)->where(array(‘id‘=>32))->or_where(array(‘id‘=>39))->get(‘mp4ba‘); 27 //echo $this->db->last_query();die; 28 29 30 //select id,name,url from mp4ba where id in(33,44,55); 31 //select id,name,url from mp4ba where id in(33,44,55) or sort_id in (3,4); 32 //select id,name,url from mp4ba where id not in(33,44,55); 33 //$objResult = $this->db->select(‘id,name,url‘)->where_in(‘id‘, array(33,44,55))->get(‘mp4ba‘); 34 //$objResult = $this->db->select(‘id,name,url‘)->where_in(‘id‘, array(33,44,55))->or_where_in(‘sort_id‘, array(3,4))->get(‘mp4ba‘); 35 //$objResult = $this->db->select(‘id,name,url‘)->where_not_in(‘id‘, array(33,44,55))->get(‘mp4ba‘); 36 //echo $this->db->last_query();die; 37 38 //select id,name,url from mp4ba join user on (mp4ba.uid=user.id) order by mp4ba.dateline desc; 39 //$objResult = $this->db->select(‘id,name,url‘)->from(‘mp4ba‘)->join(‘user‘, ‘mp4ba.uid = user.id‘)->order_by(‘mp4ba.dateline‘, ‘desc‘)->get(); 40 //echo $this->last_query();die; 41 42 43 //select * from mp4ba where name like ‘%刺客%‘; 44 //select * from mp4ba where name not like ‘%刺客%‘; 45 //select * from mp4ba where name like ‘%刺客%‘ or url like ‘eqfdf%‘; 46 //$objResult = $this->db->like(‘name‘, ‘刺客‘)->get(‘mp4ba‘); 47 //$objResult = $this->db->not_like(‘name‘, ‘刺客‘)->get(‘mp4ba‘); 48 //$objResult = $this->db->like(‘name‘, ‘刺客‘)->or_like(‘url‘, ‘eqfdf‘, ‘after‘)->get(‘mp4ba‘); 49 //echo $this->db->last_query();die; 50 51 52 53 //select max(id) from mp4ba where name = ‘刺客聂隐娘‘; 54 //select min(id) from mp4ba where name = ‘刺客聂隐娘‘; 55 //$objResult = $this->db->select_max(‘id‘)->get_where(‘mp4ba‘, array(‘name‘=>‘刺客聂隐娘‘)); 56 //echo $this->db->last_query();die; 57 //$objResult = $this->db->select_min(‘id‘)->get_where(‘mp4ba‘, array(‘name‘=>‘刺客聂隐娘‘)); 58 //echo $this->db->last_query();die; 59 60 //SELECT id,sort_id,menu,name FROM mp4ba WHERE id > 3 ORDER BY `dateline` desc LIMIT 10,100 61 //$objResult = $this->db->select(‘id,sort_id,menu,name‘)->from(‘mp4ba‘)->where(‘id >‘, 3)->order_by(‘dateline desc‘)->limit(100,10)->get(); 62 //echo $this->db->last_query(); 63 //return $objResult->result(); 64 65 66 /*************** 插入 *************/ 67 //生成一条基于你所提供的数据的SQL插入字符串并执行查询。你可以向函数传递 数组 或一个 对象。下面是一个使用数组的例子： 68 $arInsert = array( 69 ‘name‘ => ‘小黄人‘, 70 ‘url‘ => ‘www.test.com‘, 71 ‘sort_id‘ => 1, 72 ‘menu‘ => ‘动画片‘ 73 ); 74 //$this->db->insert(‘mp4ba‘, $arInsert); 75 //echo $this->db->insert_id();die; 76 77 78 /*************** 修改 *************/ 79 $arData = array( 80 ‘name‘ => ‘小黄人,好玩嘛‘, 81 ‘url‘ => ‘www.test_xiaohuangren.com‘, 82 ‘sort_id‘ => 1, 83 ‘menu‘ => ‘动画片‘ 84 ); 85 //$this->db->update(‘mp4ba‘, $arData, array(‘id‘=>3498)); 86 //echo $this->db->affected_rows(); #受影响的行数 87 //echo ‘<br/>‘; 88 //$objResult = $this->db->where(array(‘id‘=>3498))->get(‘mp4ba‘); 89 //formatOut($objResult->result());die; 90 91 /*************** 删除 *************/ 92 $this->db->delete(‘mp4ba‘, array(‘id‘=>3498)); 93 echo $this->db->affected_rows(); #受影响的行数 94 }
CI 中 DB_active_rec.php 该类中的部分方法的标注（会持续补充）
1 <?php 2 class CI_DB_active_record 3 { 4 /** 5 * get 6 * @author zhaoyingnan 2015-10-14 12:50 7 * @param string $table 操作的表 8 * @param int $limit limit 值 9 * @param int $offset offset 值 10 * @return object 11 **/ 12 public function get($table = ‘‘, $limit = null, $offset = null) 13 {} 14 15 /** 16 * get_where 17 * @author zhaoyingnan 2015-10-14 12:58 18 * @param string $table 操作的表 19 * @param array $where where 子句 20 * @param int $limit limit 值 21 * @param int $offset offset 值 22 * @return object 23 **/ 24 public function get_where($table = ‘‘, $where = null, $limit = null, $offset = null) 25 {} 26 27 /** 28 * select 29 * @author zhaoyingnan 2015-10-14 13:13 30 * @param string $select 查询的字段，用逗号隔开 31 * @param boolean $escape 如果你把它设为FALSE， CodeIgniter 将不会使用反引号保护你的字段或者表名 。这在进行复合查询时很有用。 32 * @return object 33 **/ 34 public function select($select = ‘*‘, $escape = NULL) 35 {} 36 37 /** 38 * SELECT MAX(field) portion of a query* @description 39 * @author zhaoyingnan 2015-10-14 13:20 40 * @param string $select max(field)作用列 41 * @param string $alias 别名 42 * @return object 43 **/ 44 public function select_max($select = ‘‘, $alias = ‘‘) 45 {} 46 47 /** 48 * SELECT MIN(field) portion of a query 49 * @author zhaoyingnan 2015-10-14 13:20 50 * @param string $select min(field)作用列 51 * @param string $alias 别名 52 * @return object 53 **/ 54 public function select_min($select = ‘‘, $alias = ‘‘) 55 {} 56 57 /** 58 * SELECT AVG(field) portion of a query 59 * @author zhaoyingnan 2015-10-14 13:20 60 * @param string $select AVG(field)作用列 61 * @param string $alias 别名 62 * @return object 63 **/ 64 public function select_avg($select = ‘‘, $alias = ‘‘) 65 {} 66 67 /** 68 * SELECT SUM(field) portion of a query 69 * @author zhaoyingnan 2015-10-14 13:20 70 * @param string $select SUM(field)作用列 71 * @param string $alias 别名 72 * @return object 73 **/ 74 public function select_sum($select = ‘‘, $alias = ‘‘) 75 {} 76 77 78 /** 79 * @description 80 * @author zhaoyingnan 2015-10-14 13:26 81 * @param string $from 表名 82 * @return object 83 **/ 84 public function from($from) 85 {} 86 87 /** 88 * where 89 * @author zhaoyingnan 2015-10-14 13:31 90 * @param mix $key 传递数组的 key 值 91 * @param mix $value 传递数组的 key 对应的 value 值 92 * @return object 93 **/ 94 public function where($key, $value = NULL, $escape = TRUE) 95 { 96 //1,简单的 key/value 方法: 97 //$this->db->where(‘name‘, $name); 98 //生成: WHERE name = ‘Joe‘ 99 100 //2.自定义 key/value 方法: 101 //$this->db->where(‘name !=‘, $name); 102 //$this->db->where(‘id <‘, $id); 103 //生成: WHERE name != ‘Joe‘ AND id < 45 104 105 //3.关联数组方法: 106 //$array = array(‘name‘ => $name, ‘title‘ => $title, ‘status‘ => $status); 107 //$this->db->where($array); 108 //生成: WHERE name = ‘Joe‘ AND title = ‘boss‘ AND status = ‘active‘ 109 //使用这个方法时你也可以包含运算符: 110 //$array = array(‘name !=‘ => $name, ‘id <‘ => $id, ‘date >‘ => $date); 111 112 //4.自定义字符串: 113 //$where = "name=‘Joe‘ AND status=‘boss‘ OR status=‘active‘"; 114 //$this->db->where($where); 115 return $this->_where($key, $value, ‘AND ‘, $escape); 116 } 117 118 /** 119 * where 120 * @author zhaoyingnan 2015-10-14 13:31 121 * @param mix $key 传递数组的 key 值 122 * @param mix $value 传递数组的 key 对应的 value 值 123 * @return object 124 **/ 125 public function or_where($key, $value = NULL, $escape = TRUE) 126 { 127 //参考where 128 return $this->_where($key, $value, ‘OR ‘, $escape); 129 } 130 131 132 /** 133 * where_in 134 * @author zhaoyingnan 2015-10-14 13:58 135 * @param string $key 要查询的列 136 * @param string $values 列的值得范围 137 * @return object 138 **/ 139 public function where_in($key = NULL, $values = NULL) 140 { 141 return $this->_where_in($key, $values); 142 } 143 144 /** 145 * or_where_in 146 * @author zhaoyingnan 2015-10-14 13:58 147 * @param string $key 要查询的列 148 * @param string $values 列的值得范围 149 * @return object 150 **/ 151 public function or_where_in($key = NULL, $values = NULL) 152 { 153 return $this->_where_in($key, $values, FALSE, ‘OR ‘); 154 } 155 156 /** 157 * where_not_in 158 * @author zhaoyingnan 2015-10-14 13:58 159 * @param string $key 要查询的列 160 * @param string $values 列的值得范围 161 * @return object 162 **/ 163 public function where_not_in($key = NULL, $values = NULL) 164 { 165 return $this->_where_in($key, $values, TRUE); 166 } 167 168 /** 169 * or_where_not_in 170 * @author zhaoyingnan 2015-10-14 13:58 171 * @param string $key 要查询的列 172 * @param string $values 列的值得范围 173 * @return object 174 **/ 175 public function or_where_not_in($key = NULL, $values = NULL) 176 { 177 return $this->_where_in($key, $values, TRUE, ‘OR ‘); 178 } 179 180 /** 181 * order by 182 * @author zhaoyingnan 2015-10-14 13:35 183 * @param string $orderby 被排序的列 184 * @param string $direction asc 或者 desc 185 * @return object 186 **/ 187 public function order_by($orderby, $direction = ‘‘) 188 {} 189 190 /** 191 * join 192 * @author zhaoyingnan 2015-10-14 14:07 193 * @param string $table 表名 194 * @param string $cond 条件 195 * @param string $type 指定 JOIN 的类型可选项包括：left, right, outer, inner, left outer, 以及 right outer 196 * @return 197 **/ 198 public function join($table, $cond, $type = ‘‘) 199 {} 200 201 /** 202 * like 203 * @author zhaoyingnan 2015-10-14 14:28 204 * @param stringi $field 错作的列 205 * @param mix $match 规则 206 * @param mix $side 通配符（%）位置可用的选项是 ‘before‘, ‘after‘ 以及 ‘both‘ (这是默认值) 207 * @return object 208 **/ 209 public function like($field, $match = ‘‘, $side = ‘both‘) 210 { 211 return $this->_like($field, $match, ‘AND ‘, $side); 212 } 213 214 /** 215 * not_like 216 * @author zhaoyingnan 2015-10-14 14:28 217 * @param stringi $field 错作的列 218 * @param mix $match 规则 219 * @param mix $side 通配符（%）位置可用的选项是 ‘before‘, ‘after‘ 以及 ‘both‘ (这是默认值) 220 * @return object 221 **/ 222 public function not_like($field, $match = ‘‘, $side = ‘both‘) 223 { 224 return $this->_like($field, $match, ‘AND ‘, $side, ‘NOT‘); 225 } 226 227 /** 228 * or_like 229 * @author zhaoyingnan 2015-10-14 14:28 230 * @param stringi $field 错作的列 231 * @param mix $match 规则 232 * @param mix $side 通配符（%）位置可用的选项是 ‘before‘, ‘after‘ 以及 ‘both‘ (这是默认值) 233 * @return object 234 **/ 235 public function or_like($field, $match = ‘‘, $side = ‘both‘) 236 { 237 return $this->_like($field, $match, ‘OR ‘, $side); 238 } 239 240 /** 241 * or_not_like 242 * @author zhaoyingnan 2015-10-14 14:28 243 * @param stringi $field 错作的列 244 * @param mix $match 规则 245 * @param mix $side 通配符（%）位置可用的选项是 ‘before‘, ‘after‘ 以及 ‘both‘ (这是默认值) 246 * @return object 247 **/ 248 public function or_not_like($field, $match = ‘‘, $side = ‘both‘) 249 { 250 return $this->_like($field, $match, ‘OR ‘, $side, ‘NOT‘); 251 } 252 253 /** 254 * insert 单条插入 255 * @author zhaoyingnan 2015-10-14 14:52 256 * @param string $table 表名 257 * @param array $set 关联数组 258 * @return object 259 **/ 260 function insert($table = ‘‘, $set = NULL) 261 {} 262 263 /** 264 * insert 批量出入 265 * @author zhaoyingnan 2015-10-14 14:52 266 * @param string $table 表名 267 * @param array $set 关联数组 268 * @return object 269 **/ 270 public function insert_batch($table = ‘‘, $set = NULL) 271 {} 272 273 /** 274 * update 275 * @author zhaoyingnan 2015-10-14 15:02 276 * @param string $table 表名 277 * @param array $set 修改内容的关联数组 278 * @param mixed $where where条件 279 * @return object 280 **/ 281 public function update($table = ‘‘, $set = NULL, $where = NULL, $limit = NULL) 282 {} 283 284 /** 285 * delete 286 * @author zhaoyingnan 2015-10-14 15:12 287 * @param mix $table 表名 288 * @param mixed $where where条件 289 * @return object 290 **/ 291 public function delete($table = ‘‘, $where = ‘‘, $limit = NULL, $reset_data = TRUE) 292 { 293 //第一个参数是表名，第二个参数是where子句。你可以不传递第二个参数，使用 where() 或者 or_where() 函数来替代它: 294 //$this->db->where(‘id‘, $id); 295 //$this->db->delete(‘mytable‘); 296 297 298 //如果你想要从一个以上的表中删除数据，你可以将一个包含了多个表名的数组传递给delete()函数。 299 //$tables = array(‘table1‘, ‘table2‘, ‘table3‘); 300 //$this->db->where(‘id‘, ‘5‘); 301 //$this->db->delete($tables); 302 303 304 //如果你想要删除表中的全部数据，你可以使用 truncate() 函数，或者 empty_table() 函数。 305 } 306 307 /** 308 * limit 309 * @author zhaoyingnan 2015-10-14 14:34 310 * @param int $value 311 * @param int $offset 312 * @return object 313 **/ 314 public function limit($value, $offset = ‘‘) 315 {} 316 317 318 319 /** 320 * Where 321 * 322 * Called by where() or or_where() 323 * 324 * @param mixed 325 * @param mixed 326 * @param string 327 * @return object 328 **/ 329 protected function _where($key, $value = NULL, $type = ‘AND ‘, $escape = NULL) 330 {} 331 332 /** 333 * Like 334 * 335 * Called by like() or orlike() 336 * 337 * @param mixed 338 * @param mixed 339 * @param string 340 * @return object 341 **/ 342 protected function _like($field, $match = ‘‘, $type = ‘AND ‘, $side = ‘both‘, $not = ‘‘) 343 { 344 if ( ! is_array($field)) 345 { 346 $field = array($field => $match); 347 } 348 349 foreach ($field as $k => $v) 350 { 351 $k = $this->_protect_identifiers($k); 352 353 $prefix = (count($this->ar_like) == 0) ? ‘‘ : $type; 354 355 $v = $this->escape_like_str($v); 356 357 if ($side == ‘none‘) 358 { 359 $like_statement = $prefix." $k $not LIKE ‘{$v}‘"; 360 } 361 elseif ($side == ‘before‘) 362 { 363 $like_statement = $prefix." $k $not LIKE ‘%{$v}‘"; 364 } 365 elseif ($side == ‘after‘) 366 { 367 $like_statement = $prefix." $k $not LIKE ‘{$v}%‘"; 368 } 369 else 370 { 371 $like_statement = $prefix." $k $not LIKE ‘%{$v}%‘"; 372 } 373 374 // some platforms require an escape sequence definition for LIKE wildcards 375 if ($this->_like_escape_str != ‘‘) 376 { 377 $like_statement = $like_statement.sprintf($this->_like_escape_str, $this->_like_escape_chr); 378 } 379 380 $this->ar_like[] = $like_statement; 381 if ($this->ar_caching === TRUE) 382 { 383 $this->ar_cache_like[] = $like_statement; 384 $this->ar_cache_exists[] = ‘like‘; 385 } 386 387 } 388 return $this; 389 } 390 391 }
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原文地址：http://www.cnblogs.com/yingnan/p/4877611.html
