ZendFramework-2.4 源代码 - 关于MVC - Model层
所谓的谓词Predicate
// ------ 所谓的谓词 ------
// 条件 case.3
$where = new \Zend\Db\Sql\Where();
$expression = new \Zend\Db\Sql\Predicate\Expression("field1=? and field2=?",array('a','b'));
$where->addPredicates($expression,\Zend\Db\Sql\Predicate\PredicateSet::OP_OR); // 条件 case.4
$predicate = new \Zend\Db\Sql\Predicate\Predicate();
$predicate = new \Zend\Db\Sql\Predicate\Expression("field1=? and field2=?",array('a','b'));
$where->addPredicates($predicate,\Zend\Db\Sql\Predicate\PredicateSet::OP_OR);
所谓的添加、删除、修改、查询
/**
* 所谓的添加、删除、修改、查询
* @author zhouzhian
*
*/
class CrudTest{ /**
* 下面这个代码能执行的条件是:
* 有注入“服务管理器”,即:可正常调用$this->getServiceLocator()
*/
public function testTableGateway(){
$dbAdapter = $this->getServiceLocator()->get('Zend\Db\Adapter\Adapter');
$resultSetPrototype = new \Zend\Db\ResultSet\ResultSet();
$resultSetPrototype->setArrayObjectPrototype(new \Album\Model\Album());
$tableGateway = new \Zend\Db\TableGateway\TableGateway('album', $dbAdapter, null, $resultSetPrototype);
} /**
* 条件
* 查询条件、删除条件、修改条件、查询插入条件
*/
public function testWhere(){
// ---------条件---------
$id = 0; // 条件 case.0
$where = array('id' => $id); // 条件 case.1
$where = new \Zend\Db\Sql\Where();
$where->addPredicates(array('id' => $id), \Zend\Db\Sql\Predicate\PredicateSet::OP_AND); // 条件 case.2
$where = new \Zend\Db\Sql\Where();
$where->addPredicates(array(
'field1=? and field2=?' => array('a','b'),// field1=a and field2=b
'field2' => null, // field2 IS NULL
'field3' => array(1,2,3), // field3 in(1,2,3)
'field4' => '4' // field4=4
), \Zend\Db\Sql\Predicate\PredicateSet::OP_OR); // 条件 case.3
$where = new \Zend\Db\Sql\Where();
$expression = new \Zend\Db\Sql\Predicate\Expression("field1=? and field2=?",array('a','b'));
$where->addPredicates($expression,\Zend\Db\Sql\Predicate\PredicateSet::OP_OR); // 条件 case.4
$predicate = new \Zend\Db\Sql\Predicate\Predicate();
$predicate = new \Zend\Db\Sql\Predicate\Expression("field1=? and field2=?",array('a','b'));
$where->addPredicates($predicate,\Zend\Db\Sql\Predicate\PredicateSet::OP_OR); // 条件 case.5
// WHERE "field0" IS NULL OR "field3" IN (:where1, :where2, :where3) OR (field3=:where4 and field4=:where5)
$where1 = new \Zend\Db\Sql\Where();
$expression1 = new \Zend\Db\Sql\Predicate\Expression("field3=? and field4=?",array('a','b'));
$where1->addPredicates($expression1,\Zend\Db\Sql\Predicate\PredicateSet::OP_AND);
$condition = array(
'field0' => null,
'field3' => array(1,2,3),
$where1,
);
$where = new \Zend\Db\Sql\Where();
$where->addPredicates($condition,\Zend\Db\Sql\Predicate\PredicateSet::OP_OR);
} /**
* 查询
*/
public function testSelect(){
$where = $this->testWhere(); // ---------查询---------
// 执行 case.0,这种方式不能自己指定要获取的列
// SELECT "album".* FROM "album" WHERE field1=:where1 and field2=:where2
$resultSet = $this->tableGateway->select($where); // 执行 case.1,指定要查询的列
// SELECT "album"."field1" AS "field1", "album"."field2" AS "field2_alias" FROM "album" WHERE field1=:where1 and field2=:where2
$select = $this->tableGateway->getSql()->select();
$select->columns(array('field1','field2_alias'=>'field2'));
$select->where($where); // where ...
$resultSet = $this->tableGateway->selectWith($select); // $rowset === Zend\Db\ResultSet\ResultSet // 执行 case.2,指定别名
// SELECT "table1_alias"."field1" AS "field1", "table1_alias"."field2" AS "field2_alias" FROM "album" AS "table1_alias" WHERE field1=:where1 and field2=:where2
$select = new \Zend\Db\Sql\Select();
$select->from(array('table1_alias'=>'album'));
$select->columns(array('field1','field2_alias'=>'field2'));
$select->where($where); // where ...
$resultSet = $this->tableGateway->selectWith($select); // 执行 case.3,分组、排序、分页限制
// SELECT "album"."field1" AS "field1", "album"."field2" AS "field2_alias"
// FROM "album" WHERE field1=:where1 and field2=:where2
// GROUP BY "field1", "field2"
// ORDER BY "field1" ASC, "field2" DESC
// LIMIT :limit OFFSET :offset
$select = $this->tableGateway->getSql()->select();
$select->columns(array('field1','field2_alias'=>'field2'));
$select->where($where);
$select->group(array('field1','field2')); // group by ....
$select->order(array('field1'=>'ASC','field2'=>'DESC')); // $select->order('field1 ASC, field2 DESC'); 逗号后面要带个空格
$select->offset(1);
$select->limit(10);
$resultSet = $this->tableGateway->selectWith($select); // ---关联---
// SELECT "table1_alias"."t1_field1" AS "t1_field1", "table1_alias"."t1_field2" AS "t1_field2_alias", "table2_alias"."t2_field1" AS "t2_field1", "table2_alias"."t2_field2" AS "t2_field2", "table3_alias".*
// FROM "album" AS "table1_alias"
// LEFT JOIN "table2" AS "table2_alias" ON "table2_alias"."t1_field1_ref" AND "table1_alias"."t1_field1"
// LEFT JOIN "table3" AS "table3_alias" ON "table3_alias"."t1_field1_ref" AND "table1_alias"."t1_field1"
// WHERE field1=:where1 and field2=:where2
// GROUP BY "t1_field1", "t1_field2"
// ORDER BY "t1_field1" ASC, "t1_field2" DESC
// LIMIT :limit OFFSET :offset
$select = new \Zend\Db\Sql\Select();
$select->from(array('table1_alias'=>'album'));
$select->columns(array('t1_field1','t1_field2_alias'=>'t1_field2'));
$select->where($where);
$select->group(array('t1_field1','t1_field2'));
$select->join(array('table2_alias'=>'table2'), 'table2_alias.t1_field1_ref AND table1_alias.t1_field1', array('t2_field1','t2_field2') ,'LEFT');
$select->join(array('table3_alias'=>'table3'), 'table3_alias.t1_field1_ref AND table1_alias.t1_field1', '*' ,'LEFT');
$select->order(array('t1_field1'=>'ASC','t1_field2'=>'DESC'));
$select->offset(1);
$select->limit(10);
$resultSet = $this->tableGateway->selectWith($select); // ---子查询---
// 执行 case.1,【子查询作为条件】
// SELECT * from pg_user where id in(SELECT id from pg_user);
$selectSubTable = new \Zend\Db\Sql\Select();
$selectSubTable->columns(array('t2_field1'));
$selectSubTable->where($where);
$selectSubTable->from(array('table2_alias'=>'table2'));
$select = new \Zend\Db\Sql\Select();
$select->columns(array('t1_field1','t1_field2_alias'=>'t1_field2'));
$select->where(array('id'=>array($selectSubTable)));
$select->from(array('table1_alias'=>'album'));
$select->limit(10);
$resultSet = $this->tableGateway->selectWith($select); // 执行 case.2,【子查询作为表】子查询出列表,再从列表中查询
// SELECT "sub_table2_alias"."t1_field1" AS "t1_field1", "sub_table2_alias"."t1_field2" AS "t1_field2_alias"
// FROM (SELECT "table2_alias"."t2_field1" AS "t2_field1", "table2_alias"."t2_field2" AS "t2_field2_alias" FROM "table2" AS "table2_alias") AS "sub_table2_alias"
// LIMIT :limit
$selectSubTable = new \Zend\Db\Sql\Select();
$selectSubTable->columns(array('t2_field1','t2_field2_alias'=>'t2_field2'));
$selectSubTable->from(array('table2_alias'=>'table2'));
{ // build $tableGateway
$dbAdapter = $this->getServiceLocator()->get('Zend\Db\Adapter\Adapter');
$resultSetPrototype = new \Zend\Db\ResultSet\ResultSet();
$resultSetPrototype->setArrayObjectPrototype(new \Album\Model\Album());
$tableGateway = new \Zend\Db\TableGateway\TableGateway(array('sub_table2_alias'=>$selectSubTable), $dbAdapter, null, $resultSetPrototype);
}
$select = new \Zend\Db\Sql\Select();
$select->columns(array('t1_field1','t1_field2_alias'=>'t1_field2'));
$select->from(array('sub_table2_alias'=>$selectSubTable));
$select->limit(10);
$resultSet = $tableGateway->selectWith($select); // 执行 case.3,【子查询作为字段】子查询只能返回单条
// SELECT "table1_alias"."t1_field1" AS "t1_field1", "table1_alias"."t1_field2" AS "t1_field2_alias", (SELECT "table2_alias"."t2_field2" AS "t2_field2_alias" FROM "table2" AS "table2_alias") AS "sub_field2_alias"
// FROM "album" AS "table1_alias" LIMIT :limit
$selectSub = new \Zend\Db\Sql\Select();
$selectSub->from(array('table2_alias'=>'table2'));
$selectSub->columns(array('t2_field2_alias'=>'t2_field2')); // 只能有一列
$select = new \Zend\Db\Sql\Select();
$select->from(array('table1_alias'=>'album'));
$select->columns(array('t1_field1','t1_field2_alias'=>'t1_field2','sub_field2_alias'=>$selectSub));
$select->limit(10);
$resultSet = $this->tableGateway->selectWith($select); // ---联合查询---
// ( SELECT "table1_alias"."t1_field1" AS "t1_field1", "table1_alias"."t1_field2" AS "field2_alias" FROM "album" AS "table1_alias" )
// UNION ALL ( SELECT "table2_alias"."t2_field1" AS "t2_field1", "table2_alias"."t2_field2" AS "field2_alias" FROM "table2" AS "table2_alias" )
$select = new \Zend\Db\Sql\Select();
$select->from(array('table1_alias'=>'album'));
$select->columns(array('t1_field1','t1_field2_alias'=>'t1_field2'));
$select1 = new \Zend\Db\Sql\Select();
$select1->from(array('table2_alias'=>'table2'));
$select1->columns(array('t2_field1','t2_field2_alias'=>'t2_field2'));
$select->where($where);
$select->combine($select1,'UNION ALL','');
$resultSet = $this->tableGateway->selectWith($select); // ---统计---
// SELECT "album"."count""("*")" AS "count_total" FROM "album"
$select = $this->tableGateway->getSql()->select();
$select->columns(array('count_total'=>new \Zend\Db\Sql\Expression('count(*)')));
$resultSet = $this->tableGateway->selectWith($select); // ---------结果集---------
// ---单条---
$itemRecord = $resultSet->current();
echo $itemRecord->field1; // ---列表---
$itemRecordList = $resultSet;
foreach ($itemRecordList as $itemRecord){
echo $itemRecord->field1;
}
} /**
* 插入
*/
public function testInsert(){
$where = $this->testWhere();
// ---------添加---------
// case.0
// INSERT INTO "album" ("field1", "field2") VALUES (:field1, :field2)
$data = array(
'field1' =>'field1_value',
'field2' =>'field2_value',
);
$affectedRows = $this->tableGateway->insert($data); // case.1
// INSERT INTO "album" ("field1", "field2") VALUES (:field1, :field2)
$insert = $this->tableGateway->getSql()->insert();
$insert->values($data);
$affectedRows = $this->tableGateway->insertWith($insert); // case.2 查询插入
// INSERT INTO "album" ("des_table_field1", "des_table_field2") SELECT "table1_alias"."field1" AS "field1", "table1_alias"."field2" AS "field2_alias" FROM "table1" AS "table1_alias" WHERE ...
$select = new \Zend\Db\Sql\Select();
$select->columns(array('field1','field2_alias'=>'field2'));
$select->where($where);
$select->from(array('table1_alias'=>'table1')); $insert = $this->tableGateway->getSql()->insert();
$insert->select($select);
$insert->into('album');
$insert->columns(array('des_table_field1','des_table_field2'));
$affectedRows = $this->tableGateway->insertWith($insert);
} /**
* 删除
*/
public function testDelete(){
$where = $this->testWhere();
// ---------删除---------
// case.0
// DELETE FROM "album" WHERE ...
$affectedRows = $this->tableGateway->delete($where); // case.1
// DELETE FROM "album" WHERE ...
$delete = $this->tableGateway->getSql()->delete();
$delete->where($where);
$affectedRows = $this->tableGateway->deleteWith($delete);
} /**
* 修改
*/
public function testUpdate(){
$where = $this->testWhere();
// ---------修改---------
$data = array(
'field1' =>'field1_value',
'field2' =>'field2_value',
);
// case.0
// UPDATE "album" SET "field1" = :field1, "field2" = :field2 WHERE ...
$affectedRows = $this->tableGateway->update($data, $where); // case.1
// UPDATE "album" SET "field1" = :field1, "field2" = :field2 WHERE ...
$update = $this->tableGateway->getSql()->update();
$update->set($data);
$update->where($where);
$affectedRows = $this->tableGateway->updateWith($update);
} }
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