get tableName with options tablePrefix

[yiidevelop]

Please review and approval

Thanks

[coveralls]

Coverage decreased (-0.11%) when pulling a0117d6 on yiidevelop:patch-1 into 2a152cb on yiisoft:master.

[qiangxue]

won't accept this because the default implementation is more like a placeholder. We don't want it to be dependent on the tablePrefix property.

[yiidevelop]

Yes, so when we use tablePrefix then frequent must use extends method [[tableName()]]:

class MyActiveRecord extends yii\db\ActiveRecord
{
.....
    public static function tableName()
    {
        return '{{%my_active_record}}';
    }
.....

I feel this is a waste, I know it's been fully utilized in gii

[cebe]

Beening explicit about tablename by overriding it is also faster than relying on default implementation.