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CI 框架中 AR 操作

时间:2015-10-14 17:22:02      阅读:304      评论:0      收藏:0      [点我收藏+]

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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)

技术分享
  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 }
View Code

 

CI 框架中 AR 操作

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原文地址:http://www.cnblogs.com/yingnan/p/4877611.html

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