1. Multiple conditional statements, many on the Internet are just one greater than or one Less than, there are no 2 merged ones, such as
$where['_string'] = 'this.b > 2 & this.b<4';
2.group
mysql:
$res = $model->where(['sTaskId'=>['$in'=>$task_array]])->group('a')->field('a,sum(a)')->select();
mongodb:
$key = ['a'=>1]; //groupby的字段
$init = ['num'=>0];//统计的初始值
$option = array(
'table' => 'course’, // 表名
'condition’=>['sTaskId'=>['$in'=>$task_array]], //group中过滤条件
);
//必须要带option
$reduce = "function(obj, prev){prev.num = prev.num+obj.a}";
$model = new TestModel();
$res = $model->group($key, $init, $reduce, $option);
这里讲一下tp的mongo扩展是有问题的，在group里调用where会无效，具体解决方案是要在mongo.class.php文件
a.把$query改为如下:
$query = $this->parseWhere(isset($options['condition'])?$options['condition']:array());
当然$this->queryStr 也要改的
b.把$group改为:
$group = $this->_collection->group($keys,$initial,$reduce,$query);
3 which is greater than 2 and less than 4. If you want to use the model model to query, and your main configuration is mysql , then you need to configure it in the configuration file first
'mongo' => [ DB_TYPE => mongo DB_HOST => localhost DB_NAME => test DB_PORT => 40000 DB_PREFIX =>'' DB_USER => '' DB_PWD => '' ],
and then configure it in the model file,
a.protected $trueTableName = 'table name';
b.protected $connection = 'driver name, Here is mongo';
c. This model inherits MongoModel
4. Batch update
mysql里只要$res = $model->save(['a'=>1']); mongo的话需要写成$res = $model->where([])->save(['a'=>1]);
5. Mongo note:
mongo对于数据类型的控制比较严格，如果你存个int的1，用'1'去查是查不到的!