Php 在数据映射器模式中创建对象数组
编辑：在问题的底部输出代码 我刚刚发布了一个问题，以为我的问题是查询，但结果是我的PHP代码 问题出在这里。我有一个GoalChallenge类，它有许多属性，其中一个属性应该是一个，或者一个ProductService对象数组；请参见下面的GoalChallenge类（注意，我已经去掉了其他getter和setter，并留下了与ProductService类相关的getter和setter 当我使用GoalChallenge:：findByPersonaId时，会创建一个ProductService对象并与匹配的GoalChallenge对象相关联，但GoalChallenge->product\u服务属性中应该有两个ProductService对象（查询应该匹配两行）。相反，将创建一个重复的GoalChallenge对象，该对象包含除product_service属性之外的所有属性值，该属性包含查询中的第二个匹配对象 我需要两个匹配的ProductService对象成为同一个GoalChallenge对象的一部分（与查询匹配）-我如何才能做到这一点 如果您还需要什么，请询问。非常感谢您的帮助！代码如下 GoalChallenge.class.phpPhp 在数据映射器模式中创建对象数组,php,mysql,oop,pdo,Php,Mysql,Oop,Pdo,编辑：在问题的底部输出代码 我刚刚发布了一个问题，以为我的问题是查询，但结果是我的PHP代码 问题出在这里。我有一个GoalChallenge类，它有许多属性，其中一个属性应该是一个，或者一个ProductService对象数组；请参见下面的GoalChallenge类（注意，我已经去掉了其他getter和setter，并留下了与ProductService类相关的getter和setter 当我使用GoalChallenge:：findByPersonaId时，会创建一个ProductServ
<?php
class GoalChallenge
{
private $id;
private $persona_id;
private $title;
private $item_category;
private $description;
private $solution;
private $product_service;
private $research_checklist;
private $subtopics;
private $keywords;
private $status;
public function __construct(
$id = null,
$persona_id = null,
$title = null,
$item_category = null,
$description = null,
$solution = null,
ProductService $product_service = null,
$research_checklist = null,
$subtopics = null,
$keywords = null,
$status = null
) {
$this->id = $id;
$this->persona_id = $persona_id;
$this->title = $title;
$this->item_category = $item_category;
$this->description = $description;
$this->solution = $solution;
$this->product_service = $product_service;
$this->research_checklist = $research_checklist;
$this->subtopics = $subtopics;
$this->keywords = $keywords;
$this->status = $status;
}
public function getProductService()
{
return $this->product_service;
}
public function setProductService(ProductService $product_service)
{
$this->product_service = $product_service;
}
}
GoalChallenge Object
(
[id:GoalChallenge:private] => 173
[persona_id:GoalChallenge:private] => 14
[title:GoalChallenge:private] => Lead Gen
[item_category:GoalChallenge:private] => Business Challenge
[description:GoalChallenge:private] =>
[solution:GoalChallenge:private] => Advertising
[product_service:GoalChallenge:private] => ProductService Object
(
[id:ProductService:private] => 1
[goal_challenge_id:ProductService:private] => 173
[url:ProductService:private] => www.google.com
[feature_benefit:ProductService:private] => Array
(
[0] => good for testing
[1] => mobile
)
)
[research_checklist:GoalChallenge:private] => 0,0,0,0,0,0
[subtopics:GoalChallenge:private] =>
[keywords:GoalChallenge:private] => ,,,,
[status:GoalChallenge:private] => 1
)
GoalChallenge Object
(
[id:GoalChallenge:private] => 173
[persona_id:GoalChallenge:private] => 14
[title:GoalChallenge:private] => Lead Gen
[item_category:GoalChallenge:private] => Business Challenge
[description:GoalChallenge:private] =>
[solution:GoalChallenge:private] => Advertising
[product_service:GoalChallenge:private] => ProductService Object
(
[id:ProductService:private] => 3
[goal_challenge_id:ProductService:private] => 173
[url:ProductService:private] => www.test.com
[feature_benefit:ProductService:private] => Array
(
[0] => good for searching
[1] => well known
)
)
[research_checklist:GoalChallenge:private] => 0,0,0,0,0,0
[subtopics:GoalChallenge:private] =>
[keywords:GoalChallenge:private] => ,,,,
[status:GoalChallenge:private] => 1
)
+-----+------------+----------+--------------------+-------------+-------------+-----------------+--------------------+-----------+----------+--------+------+----------------+--------------------------------+
| id | persona_id | title | item_category | description | solution | product_service | research_checklist | subtopics | keywords | status | psid | url | feature_benefit |
+-----+------------+----------+--------------------+-------------+-------------+-----------------+--------------------+-----------+----------+--------+------+----------------+--------------------------------+
| 173 | 14 | Lead Gen | Business Challenge | | Advertising | NULL | 0,0,0,0,0,0 | NULL | ,,,, | 1 | 1 | www.google.com | good for testing, mobile |
| 173 | 14 | Lead Gen | Business Challenge | | Advertising | NULL | 0,0,0,0,0,0 | NULL | ,,,, | 1 | 3 | www.test.com | good for searching, well known |
+-----+------------+----------+--------------------+-------------+-------------+-----------------+--------------------+-----------+----------+--------+------+----------------+--------------------------------+
正如所怀疑的那样，
JOINProductServicemapObject（）ProductServiceGoalChallengeProductServiceGoalChallengemapObject（）public function mapObject(array $row)
{
$entry = new GoalChallenge();
$entry->setId($row['id']);
$entry->setPersonaId($row['persona_id']);
$entry->setTitle($row['title']);
$entry->setItemCategory($row['item_category']);
$entry->setDescription($row['description']);
$entry->setSolution($row['solution']);
$entry->SetResearchChecklist($row['research_checklist']);
$entry->setSubtopics($row['subtopics']);
$entry->setKeywords($row['keywords']);
$entry->setStatus($row['status']);
// Create ProductService objects for each item in the sub-array
foreach ($row['product_services'] as $ps) {
$entry->setProductService(new ProductService($ps['psid'], $row['id'], $ps['url'], explode(',', $ps['feature_benefit'])));
}
return $entry;
}
setProductService（）public function setProductService(ProductService $product_service)
{
// Append onto an array
$this->product_service[] = $product_service;
}
GoalChallenge:：u construct（）ProductService$product\u service=array（）因此，这有点复杂，它说明了为什么通常使用预构建。这种逻辑以一种易于重用的方式为您抽象出来。PDO确实有一种
FETCH_GROUPidProductServiceprint\r（$goal\u challenges）Array
(
[173] => Array
(
[id] => 173
[persona_id] => 14
[title] => Lead Gen
[item_category] => Business Challenge
[description] =>
[solution] => Advertising
[research_checklist] => 0,0,0,0,0,0
[subtopics] =>
[keywords] => ,,,,
[status] => 1
[psid] => 1
[url] => www.google.com
[feature_benefit] => good for testing, mobile
[product_services] => Array
(
[0] => Array
(
[0] => 1
[1] => www.google.com
[2] => good for testing, mobile
)
[1] => Array
(
[0] => 3
[1] => www.test.com
[2] => good for searching, well known
)
)
)
)
// Temp variable to remember what goals_challenges.id is being grouped
$current_id = null;
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
// Create a new structure if the id changed
if($row['id'] !== $current_id) {
$current_id = $row['id'];
// Store a new row for goal_challenges, holding all
// the common columns in its outer structure
$goal_challenges[$row['id']] = $row;
// and it has a sub-array for product services
$goal_challenges[$row['id']]['product_servies'] = array();
}
// Append the product_services columns as an array onto the subarray
$goal_challenges[$row['id']]['product_services'][] = array('psid'=>$row['psid'], 'url'=>$row['url'], 'feature_benefit'=>$row['feature_benefit']);
}
// Now you can pass each row of the $goal_challenges array
// to mapObject. There should be only one row, but if you
// use the same pattern for queries that return many rows it
// will work without much modification
$result_set = array();
foreach ($goal_challenges as $gc) {
$result_set[] = $this->mapObject($gc);
}
// Return the array of results (which probably has only one element)
return $result_set;
public function mapObject(array $row)
{
$entry = new GoalChallenge();
$entry->setId($row['id']);
$entry->setPersonaId($row['persona_id']);
$entry->setTitle($row['title']);
$entry->setItemCategory($row['item_category']);
$entry->setDescription($row['description']);
$entry->setSolution($row['solution']);
$entry->SetResearchChecklist($row['research_checklist']);
$entry->setSubtopics($row['subtopics']);
$entry->setKeywords($row['keywords']);
$entry->setStatus($row['status']);
// Create ProductService objects for each item in the sub-array
foreach ($row['product_services'] as $ps) {
$entry->setProductService(new ProductService($ps['psid'], $row['id'], $ps['url'], explode(',', $ps['feature_benefit'])));
}
return $entry;
}
public function setProductService(ProductService $product_service)
{
// Append onto an array
$this->product_service[] = $product_service;
}