问推动ORM:完全递归地水合物具有外键关系的泛型模型对象，用于JSON序列化

EN

function getAllTheHeroes(){
    $query = PropelQuery::from("Hero")
    $heroes = $query->find();  //hero model objects
    foreach($heroes as $hero){
        $heroSkills = $hero->getHeroSkills();  //hero_skill model objects
        foreach($heroSkills as $heroSkill){  
            $skill = $heroSkill->getSkill();  //skill model object.
        }
        echo $hero->exportTo('JSON');  //export to JSON string (new in Propel 1.6)
    }      
}

[{
"Id":1, 
"Name":"Hero McHeroington", 
"Description":"Awesome.", 
"HeroSkills":
{
    "HeroSkill_0":
    {
        "Id":1,
        "HeroId":1,
        "SkillId":2,
        "Skill":
            {
                "Id":2,
                "Name":"Interpretive Dance",
                "Rank":5
            }
    },
    "HeroSkill_1":
    {
        "Id":2,
        "HeroId":1,
        "SkillId":4,
        "Skill":
            {
                "Id":4,
                "Name":"Pottery",
                "Rank":2
            }
    },
    "HeroSkill_2":
    {
        "Id":3,
        "HeroId":1,
        "SkillId":5,
        "Skill":
            {
                "Id":5,
                "Name":"Walking",
                "Rank":1
            }
    }
}
 },{
"Id":2, 
"Name":"Squire McTinyPants",
"Description":"Chipper.", 
"HeroSkills":
{
    "HeroSkill_0":
    {
        "Id":4,
        "HeroId":2,
        "SkillId":2,
        "Skill":
            {
                "Id":2,
                "Name":"Interpretive Dance",
                "Rank":10
            }
    },
    "HeroSkill_1":
    {
        "Id":5,
        "HeroId":2,
        "SkillId":3,
        "Skill":
            {
                "Id":3,
                "Name":"Peeping",
                "Rank":6
            }
    },
    "HeroSkill_2":
    {
        "Id":6,
        "HeroId":2,
        "SkillId":6,
        "Skill":
            {
                "Id":6,
                "Name":"Skipping",
                "Rank":4
            }
    }
}
}]

function getModel($byClassName){
    $pq = PropelQuery::from($byClassName)
    $recs = $pq->find();  // <- collection of records of unknown type
    foreach ($recs as $rec){
        //Somehow retrieve all of the 'getFOREIGNKEY' Propel generated helper functions and call them all in sequence, 
        // then iterate down into any of these logical children objects and repeat the process to fully resolve all Foreign Key relationships within this Object
        // and all this Objects 'children' 
        // AND not get stuck in infinite loops due to Many-To-Many relationships from the 'getWHATEVER' calls running in circles.


        //Or some other method entirely to accomplish the same thing that i am just not getting...

         echo $rec->exportTo('JSON');  //export to JSON string (new in Propel 1.6)
    }
}