php bin/console generate:bundle --namespace=Acme/TestBundle


Bundle Directory Structure

The directory structure of a bundle is simple and flexible. By default, the bundle system follows a set of conventions that help to keep code consistent between all Symfony bundles. Take a look at AcmeDemoBundle, as it contains some of the most common elements of a bundle:

Controller/
Contains the controllers of the bundle (e.g. RandomController.php).
DependencyInjection/
Holds certain Dependency Injection Extension classes, which may import service configuration, register compiler passes or more (this directory is not necessary).
Resources/config/
Houses configuration, including routing configuration (e.g. routing.yml).
Resources/views/
Holds templates organized by controller name (e.g. Random/index.html.twig).
Resources/public/
Contains web assets (images, stylesheets, etc) and is copied or symbolically linked into the project web/ directory via the assets:install console command.
Tests/
Holds all tests for the bundle.
A bundle can be as small or large as the feature it implements. It contains only the files you need and nothing else.

As you move through the guides, you'll learn how to persist objects to a database, create and validate forms, create translations for your application, write tests and much more. Each of these has their own place and role within the bundle.

"autoload": {
    "psr-4": {
        "AppBundle\\": "src/AppBundle",
        "Acme\\": "src/Acme"
    },
    "classmap": [ "app/AppKernel.php", "app/AppCache.php" ]
},

composer dump-autoload 
composer install

bin/console generate:command AcmeBlogBundle app:add-user

[root@974d10bfd53c blog]# bin/console generate:command AcmeBlogBundle app:add-user
  created ./src/Acme/BlogBundle/Command/
  created ./src/Acme/BlogBundle/Command/AppAddUserCommand.php
Generated the app:add-user command in AcmeBlogBundle

                                         
  Everything is OK! Now get to work :).  
                                         

bin/console app:add-user

# app/config/parameters.yml
parameters:
    database_host:     localhost
    database_name:     symfony
    database_user:     root
    database_password: 123456

# ...

# app/config/config.yml
doctrine:
    dbal:
        driver:   pdo_mysql
        host:     '%database_host%'
        dbname:   '%database_name%'
        user:     '%database_user%'
        password: '%database_password%'
        charset: utf8mb4
        default_table_options:
            charset: utf8mb4
            collate: utf8mb4_unicode_ci

[mysqld]
# Version 5.5.3 introduced "utf8mb4", which is recommended
collation-server     = utf8mb4_unicode_ci # Replaces utf8_unicode_ci
character-set-server = utf8mb4            # Replaces utf8

[root@974d10bfd53c blog]# bin/console doctrine:database:create
Created database `symfony` for connection named default

删除数据库 
php bin/console doctrine:database:drop --force

// src/AppBundle/Entity/Product.php
namespace AppBundle\Entity;

class Product
{
    private $name;
    private $price;
    private $description;
}

php bin/console doctrine:generate:entity

以下格式输入
AcmeBlogBundle:Blog/Post

php bin/console doctrine:schema:update --force

Updating database schema...
Database schema updated successfully! "1" query was executed

// src/AppBundle/Controller/DefaultController.php

// ...
use AppBundle\Entity\Product;
use Symfony\Component\HttpFoundation\Response;
use Doctrine\ORM\EntityManagerInterface;

public function createAction()
{
    // you can fetch the EntityManager via $this->getDoctrine()
    // or you can add an argument to your action: createAction(EntityManagerInterface $em)
    $em = $this->getDoctrine()->getManager();

    $product = new Product();
    $product->setName('Keyboard');
    $product->setPrice(19.99);
    $product->setDescription('Ergonomic and stylish!');

    // tells Doctrine you want to (eventually) save the Product (no queries yet)
    $em->persist($product);

    // actually executes the queries (i.e. the INSERT query)
    $em->flush();

    return new Response('Saved new product with id '.$product->getId());
}

// if you have multiple entity managers, use the registry to fetch them
public function editAction()
{
    $doctrine = $this->getDoctrine();
    $em = $doctrine->getManager();
    $em2 = $doctrine->getManager('other_connection');
}

public function showAction($productId)
{
    $product = $this->getDoctrine()
        ->getRepository(Product::class)
        ->find($productId);

    if (!$product) {
        throw $this->createNotFoundException(
            'No product found for id '.$productId
        );
    }

    // ... do something, like pass the $product object into a template
}

检查环境依赖
php bin/symfony_requirements

通常这个配置文件不要提交到版本库，是一些动态配置 
app/config/parameters.yml

第三方库更新
composer install --no-dev --optimize-autoloader
composer dump-autoload --optimize --no-dev --classmap-authoritative

清除缓存
 php bin/console cache:clear --env=prod --no-debug --no-warmup
 php bin/console cache:warmup --env=prod

导出资源
 php bin/console assetic:dump --env=prod --no-debug

composer require annotations