ZendFramework-2.4 源代码 - 关于MVC

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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