Symfony 3.4 - 如果在多对多关系上不存在，则持续存在
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【中文标题】Symfony 3.4 - 如果在多对多关系上不存在，则持续存在【英文标题】：Symfony 3.4 - Persist if not exists on manytomany relation 【发布时间】：2018-01-08 10:56:32 【问题描述】：我面临一个非常烦人的问题。我有一个 Recipe 实体，其中包括一些具有 ManyToMany 关系的成分（带有一个成分实体）和一个用于映射的 RecipeIngredient 实体。
用户可以通过文本输入添加食谱并指定该食谱的成分。
我的问题是，当用户键入我的数据库中已经存在的成分名称时，我想在我的数据库中获取一个并将其与新配方映射，并且显然不要坚持使用任何双重成分。
Recipe.php
/**
* @ORM\Entity
* @ORM\Table(name="recipe")
*/
class Recipe
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @ORM\Column(type="string", unique=false)
*/
private $title;
/**
* @var array Ingredient[]
*/
private $ingredients;
/**
* @ORM\OneToMany(targetEntity="RecipeIngredient", mappedBy="recipe_id", cascade="all")
*/
private $recipeIngredients;
/**
* @ORM\ManyToOne(targetEntity="User", inversedBy="recipes")
* @ORM\JoinColumn(name="user_id", referencedColumnName="id")
*/
private $user;
Ingredient.php
/**
* @ORM\Entity()
* @UniqueEntity(
* fields="name"
* )
* @ORM\Table(name="ingredient")
*/
class Ingredient
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @ORM\Column(type="string")
*/
private $name;
/**
* @ORM\OneToMany(targetEntity="RecipeIngredient", mappedBy="ingredient_id", fetch="EXTRA_LAZY", cascade="all")
*/
private $recipesIngredient;
RecipeIngredient.php
/**
* Class RecipesIngredient
* @package AppBundle\Entity
*
* @ORM\Entity
* @ORM\Table(name="recipe_ingredient")
*/
class RecipeIngredient
/**
* @ORM\Id
* @ORM\ManyToOne(targetEntity="Recipe", inversedBy="recipeIngredients", cascade="persist")
* @ORM\JoinColumn(nullable=false)
*/
private $recipe;
/**
* @ORM\Id
* @ORM\ManyToOne(targetEntity="Ingredient", inversedBy="recipesIngredient", cascade="persist")
* @ORM\JoinColumn(nullable=false)
*/
private $ingredient;
谢谢你帮助我。
编辑
创建配方的函数
/**
* Creates a new recipe entity.
*
* @Route("/new/recipe", name="recipe_new")
* @Method("GET", "POST")
*
* @param $request Request
* @return \Symfony\Component\HttpFoundation\RedirectResponse|\Symfony\Component\HttpFoundation\Response
*/
public function newAction(Request $request)
$needAccount = true;
if ($this->get('security.authorization_checker')->isGranted('IS_AUTHENTICATED_FULLY') || $this->get('security.authorization_checker')->isGranted('IS_AUTHENTICATED_REMEMBERED'))
$needAccount = false;
$recipe = null;
$error = $request->getSession()->get("loginError");
$errorMsg = "";
if ($error !== null)
$errorMsg = $error->getMessageKey();
$request->getSession()->remove("loginError");
if (!$needAccount)
$recipe = new Recipe($this->getUser());
$form = $this->createForm('AppBundle\Form\RecipeType', $recipe);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid())
$this->setRecipe($recipe);
$em = $this->getDoctrine()->getManager();
$em->persist($recipe);
$em->flush();
$mail = (new \Swift_Message("Nouvelle recette"))
->setFrom("*************")
->setTo("*********")
->setBody(
"Une recette vient d'être créée : *********" . $recipe->getUrl(),
'text/plain'
);
$this->get("mailer")->send($mail);
return $this->redirectToRoute('recipe_show', array('url' => $recipe->getUrl()));
return $this->render('@App/pages/recipe/new.html.twig', array(
'needAccount' => $needAccount,
"errorLogin" => $errorMsg,
'recipe' => $recipe,
'form' => $form->createView()
));
else
$recipe = new Recipe(new User());
return $this->render('@App/pages/recipe/new.html.twig', array(
'needAccount' => $needAccount,
"errorLogin" => $errorMsg,
'recipe' => $recipe,
'form' => null
));
函数集配方
private function setRecipe(Recipe $recipe)
if ($recipe->getUrl() === "")
$recipe->setUrl(preg_replace('/[^a-z0-9]+/', '-', strtolower(str_replace(explode(",", "ç,æ,œ,á,é,í,ó,ú,à,è,ì,ò,ù,ä,ë,ï,ö,ü,ÿ,â,ê,î,ô,û,å,ø"), explode(",", "c,ae,oe,a,e,i,o,u,a,e,i,o,u,a,e,i,o,u,y,a,e,i,o,u,a,o"), $recipe->getTitle()))) . '-' . time());
$recipe->setUpdatedAt(new \DateTime());
foreach ($recipe->getSteps() as $step)
$step->setRecipe($recipe);
$step->setDescription(preg_replace_callback(
'/\\\\x([a-f0-9]2)/i',
function ($matches)
return chr(hexdec($matches[1]));
,
$step->getDescription()));
foreach ($recipe->getIngredients() as $ingredient)
$ingredient->setName(preg_replace_callback('/\\\\x([a-f0-9]2)/i',
function ($matches)
return chr(hexdec($matches[1]));
,
$ingredient->getName()));
$ingredientExists = count($this->getDoctrine()->getManager()->getRepository('AppBundle:Ingredient')->createQueryBuilder('i')
->select('i.id')
->where('i.name LIKE :name')
->setParameter('name', '%' . $ingredient->getName() . '%')
->getQuery()
->execute()) > 0;
if (!$ingredientExists)
$this->getDoctrine()->getManager()->persist($ingredient);
$this->getDoctrine()->getManager()->flush();
$addedIngredient = $this->getDoctrine()->getManager()->getRepository('AppBundle:Ingredient')->createQueryBuilder('i')
->select('i.id')
->where('i.name LIKE :name')
->setParameter('name', '%' . $ingredient->getName() . '%')
->getQuery()
->execute();
$ingredient->setId($addedIngredient[0]['id']);
else
$recipe->removeIngredient($ingredient);
$ingredientBDD = $this->getDoctrine()->getManager()->getRepository('AppBundle:Ingredient')->createQueryBuilder('i')
->select('i.id, i.name')
->where('i.name LIKE :name')
->setParameter('name', '%' . $ingredient->getName() . '%')
->getQuery()
->execute()[0];
$ingredient->setId($ingredientBDD["id"]);
$ingredient->setName($ingredientBDD["name"]);
$recipeIngredient = new RecipeIngredient();
$recipeIngredient->setIngredient($ingredient);
$recipeIngredient->setRecipe($recipe);
$recipeIngredient->setQuantity($ingredient->getQuantity());
$recipeIngredient->setUnity($ingredient->getUnity());
$recipe->addRecipeIngredient($recipeIngredient);
$ingredient->addRecipeIngredient($recipeIngredient);
【问题讨论】：
包含你在控制器中使用的代码。 是的 - 我们需要查看您正在使用的表单/控制器代码 我编辑问题以添加控制器代码 【参考方案1】：我解决了这个问题，方法是“手动”保留成分并进行所有需要的更改（编辑注释，将 RecipeIngredient 中的 $ingredient 更改为 $ingredient_id，...）。
而这种方式正是我想要的方式。
【讨论】：
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