Php 如何通过从PostgreSQL转换到DQL来实现这种动态平均?
我必须添加一个过滤条件,以获取带有Php 如何通过从PostgreSQL转换到DQL来实现这种动态平均?,php,postgresql,casting,doctrine,dql,Php,Postgresql,Casting,Doctrine,Dql,我必须添加一个过滤条件,以获取带有和where()的评论列表。以下是PostgreSQL版本: SELECT * FROM listing_review WHERE( ( edited_rating_meals_nutrition + edited_rating_treatment_effectiveness + rating_accommodations_amenities ) / ( COALESCE(
和where()
的评论列表。以下是PostgreSQL版本:
SELECT *
FROM listing_review
WHERE(
(
edited_rating_meals_nutrition +
edited_rating_treatment_effectiveness +
rating_accommodations_amenities
)
/
(
COALESCE(
NULLIF(
(
(edited_rating_meals_nutrition::BOOLEAN)::INTEGER +
(edited_rating_effectiveness::BOOLEAN)::INTEGER +
(rating_accommodations_amenities::BOOLEAN)::INTEGER
)
, 0
), 1
)
)
)
>= 3;
基本上,我需要平均每行三个评级(查看),并根据它们的平均值是否等于或大于某个整数(本例中为5)进行过滤。如果它们没有在任何一个类别中被审查过,那么该类别的值为零,我必须从平均值计算中放弃它们(因此,从布尔值到整数的双重转换可以得到不为零的评分数)。我也不能除以零,这解释了合并
我可以用简单的方法完成这项工作,只需除以三,如下所示:
if (isset($searchParams[self::PARAM_MINIMUM_RATING])) {
$qb
->andWhere('((r.editedRatingTreatmentEffectiveness + r.editedRatingAccommodationsAmenities + r.editedRatingMealsNutrition) / 3) >= :minimum_rating')
->setParameter('minimum_rating', $searchParams[self::PARAM_MINIMUM_RATING]);
如何在DQL中实现这一点,使除数动态(如我的PostgreSQL查询)而不是硬编码为3?借助于此,我解决了自己的问题
基本上,DQL包含NULLIF()
以及COALESCE()
,但不包含CAST()
。我添加了以下类:
<?php
namespace DoctrineFunctions;
use Doctrine\ORM\Query\AST\Functions\FunctionNode;
use Doctrine\ORM\Query\Lexer;
use Doctrine\ORM\Query\Parser;
use Doctrine\ORM\Query\SqlWalker;
class CastToBoolean extends FunctionNode
{
public $stringPrimary;
public function getSql(SqlWalker $sqlWalker)
{
return 'CAST(' . $this->stringPrimary->dispatch($sqlWalker) . ' AS boolean)';
}
public function parse(Parser $parser)
{
$parser->match(Lexer::T_IDENTIFIER);
$parser->match(Lexer::T_OPEN_PARENTHESIS);
$this->stringPrimary = $parser->StringPrimary();
$parser->match(Lexer::T_CLOSE_PARENTHESIS);
}
}
最后,我使用所有必要的方法将SQL查询重建为DQL查询:
if (isset($searchParams[self::PARAM_MINIMUM_RATING])) {
$qb
->andWhere('((r.editedRatingTreatmentEffectiveness + r.editedRatingAccommodationsAmenities + r.editedRatingMealsNutrition) / (COALESCE(NULLIF(cast_to_int(cast_to_boolean(r.editedRatingTreatmentEffectiveness)) + cast_to_int(cast_to_boolean(r.editedRatingAccommodationsAmenities)) + cast_to_int(cast_to_boolean(r.editedRatingMealsNutrition)), 0), 1))) >= :minimum_rating')
->setParameter('minimum_rating', $searchParams[self::PARAM_MINIMUM_RATING]);
}
orm:
auto_generate_proxy_classes: ""
default_entity_manager: default
entity_managers:
default:
connection: default
mappings:
RBundle: ~
ABundle: ~
result_cache_driver:
type: memcached
host: ''
port:
query_cache_driver:
type: memcached
host: ''
port:
metadata_cache_driver:
type: memcached
host: ''
port:
naming_strategy: doctrine.orm.naming_strategy.underscore
filters:
softdeleteable:
class:
enabled:
dql:
numeric_functions:
cast_to_int: DoctrineFunctions\CastToInteger
string_functions:
cast_to_boolean: DoctrineFunctions\CastToBoolean
if (isset($searchParams[self::PARAM_MINIMUM_RATING])) {
$qb
->andWhere('((r.editedRatingTreatmentEffectiveness + r.editedRatingAccommodationsAmenities + r.editedRatingMealsNutrition) / (COALESCE(NULLIF(cast_to_int(cast_to_boolean(r.editedRatingTreatmentEffectiveness)) + cast_to_int(cast_to_boolean(r.editedRatingAccommodationsAmenities)) + cast_to_int(cast_to_boolean(r.editedRatingMealsNutrition)), 0), 1))) >= :minimum_rating')
->setParameter('minimum_rating', $searchParams[self::PARAM_MINIMUM_RATING]);
}