Simple operations with Doctrine

<?php

public function postArticleAction(Request $request) {
    $post = $request->request;

    // Create your object and sets its properties. No need to set its ID,
    // unless you specified you don't want the ID to be automatically created.
    $article = new Article();
    $article->setTitle($post->get('title'));
    $article->setContent($post->get('content'));

    // Get the Entity Manager
    $em = $this->getDoctrine()->getManager();

    // Tell Doctrine you will want to save the article.
    // Doctrine will just queue that query, it won't actually execute it.
    $em->persist($article);

    // Tells Doctrine to execute all the queries that have been queued.
    $em->flush();

    // If the ID is automatically created, then you'll have access to it
    // after the query is executed.

    // Returns the created article with an HTTP 200 (ie OK) response
    $view = $this->view($article, 200);
    return $this->handleView($view);
}

<?php

public function getArticleAction($articleId) {
    // Gets the article by ID.
    $article = $this->getDoctrine()
        ->getRepository('AppBundle:Article')
        ->find($articleId);

    if (!$article) {
        // Returns a 404 if we can't find the specified article.
        $view = $this->view("No article found for id $articleId", 404);
        return $this->handleView($view);
    }

    $view = $this->view($article, 200);
    return $this->handleView($view);
}

<?php

public function putArticleAction($articleId, Request $request) {
    $post = $request->request;
    $em = $this->getDoctrine()->getManager();
    $article = $em->getRepository('AppBundle:Article')->find($articleId);

    if (!$article) {
        // Returns a 404 if we can't find the specified article.
        $view = $this->view("No article found for id $articleId", 404);
        return $this->handleView($view);
    }

    $article->setTitle($post->get('title'));
    $article->setContent($post->get('content'));
    $em->flush();

    $view = $this->view($article, 200);
    return $this->handleView($view);
}

<?php

public function deleteArticleAction($articleId) {
    $em = $this->getDoctrine()->getManager();
    $article = $em->getRepository('AppBundle:Article')->find($articleId);

    if (!$article) {
        // Returns a 404 if we can't find the specified article.
        $view = $this->view("No article found for id $articleId", 404);
        return $this->handleView($view);
    }

    $em->remove($article);
    $em->flush();

    $view = $this->view(true, 200);
    return $this->handleView($view);
}