无法通过 docker 上的学说连接到 mysql DB

Question

基本上我对教义有问题。 这是我第一次使用学说和 mysql 在 docker 容器上建立一个项目。

所以我有docker-compose.yml

version: '3'
services: 
    api: 
        build: 
            context: ./
            dockerfile: Dockerfile
        container_name: php
        depends_on: 
            - database
        volumes: 
            - ./:/var/www/html/
        ports:
            - 8000:80
        networks:
            - backend
    database: 
        container_name: mysql
        image: mysql:8
        command: --default-authentication-plugin=mysql_native_password
        restart: always
        environment: 
            MYSQL_ROOT_PASSWORD: root
            MYSQL_DATABASE: test_db
            MYSQL_USER: user
            MYSQL_PASSWORD: Test1234
        ports: 
            - 3306:3306
        networks:
            - backend
networks:
    backend:
        driver: bridge

这是我的Dockerfile

FROM php:7.4.12-apache

RUN apt-get update && apt-get upgrade -y \
    && docker-php-ext-install mysqli pdo_mysql


RUN apt-get install -y libzip-dev
RUN docker-php-ext-install zip

# Install Composer
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer

      
EXPOSE 80

我的.env看起来像（其余在开始时由 # 注释）

APP_ENV=dev
APP_SECRET=00b8dcf4c62a3db98abc4ae12dc4a6fd
DATABASE_URL=mysql://user:Test1234@localhost:3306/bf_db

请注意， DATABASE_URL localhost 或 127.0.0.1 之间没有区别

现在当我想运行这个命令时： docker-compose exec api php bin/console doctrine:database:create

我收到这种错误：

[error] Error thrown while running command "doctrine:database:create". 
Message: "An exception occurred in driver: SQLSTATE[HY000] [2002] Connection refused"


In AbstractMySQLDriver.php line 112:

  An exception occurred in driver: SQLSTATE[HY000] [2002] Connection refused


In Exception.php line 18:

  SQLSTATE[HY000] [2002] Connection refused


In PDOConnection.php line 38:

  SQLSTATE[HY000] [2002] Connection refused

我真的不知道如何处理这个

Answer 1

DATABASE_URL 中的 localhost 或 127.0.0.1 之间没有区别

因为那些指的是 PHP 容器，而不是其他容器。

它需要是database:3306