【问题标题】：Laravel fails to connect into sqlite when in testing and uses the development postgresql settingsLaravel 在测试时无法连接到 sqlite 并使用开发 postgresql 设置
【发布时间】：2019-11-07 03:18:51
【问题描述】：

我有以下phpunit 测试：

namespace  Test\Database\Integration\Repositories;

use Tests\TestCase;
use Illuminate\Foundation\Testing\RefreshDatabase;
use App\Repositories\RoverRepository;
use App\Model\Rover;
use App\Model\Grid;

class RoverRepositoryTest extends TestCase
{
    use RefreshDatabase;

    /**
     * Undocumented variable
     *
     * @var RoverRepository|null
     */
    private $repository=null;

    /**
     * Undocumented variable
     *
     * @var Grid|null;
     */
    private $grid=null;

    public function setUp(): void
    {
        parent::setUp();

        $this->runDatabaseMigrations();

        $grid=factory(Grid::class)->create([
            'width'=>5,
            'height'=>5
        ]);

        $rover=factory(Rover::class, 5)->create([
            'grid_id' => $grid->id,
            'grid_pos_x' => rand(0, $grid->width),
            'grid_pos_y' => rand(0, $grid->height),
        ]);

        $this->grid=$grid;
        //How do I run Migrations and generate the db?

        $this->repository = new RoverRepository();
    }

    public function tearDown(): void
    {
        parent::tearDown();
        //How do I nuke my Database?
    }

   /**
     * Testing Base Search
     *
     * @return void
    */
    public function testBasicSearch(): void
    {
        $this->assertTrue(true);
    }
}

而我的phpunit.xml 设置为：

<?xml version="1.0" encoding="UTF-8"?>
<phpunit backupGlobals="false"
         backupStaticAttributes="false"
         bootstrap="vendor/autoload.php"
         colors="true"
         convertErrorsToExceptions="true"
         convertNoticesToExceptions="true"
         convertWarningsToExceptions="true"
         processIsolation="false"
         stopOnFailure="false">
    <testsuites>
        <testsuite name="Unit">
            <directory suffix="Test.php">./tests/Unit</directory>
        </testsuite>

        <testsuite name="Feature">
            <directory suffix="Test.php">./tests/Feature</directory>
        </testsuite>
        <testsuite name="Database">
            <directory suffix="Test.php">./tests/Database</directory>
        </testsuite>
    </testsuites>
    <filter>
        <whitelist processUncoveredFilesFromWhitelist="true">
            <directory suffix=".php">./app</directory>
        </whitelist>
    </filter>
    <php>
        <env name="APP_ENV" value="testing"/>
        <env name="BCRYPT_ROUNDS" value="4"/>
        <env name="CACHE_DRIVER" value="array"/>
        <env name="MAIL_DRIVER" value="array"/>
        <env name="QUEUE_CONNECTION" value="sync"/>
        <env name="SESSION_DRIVER" value="array"/>
        <env name="DB_CONNECTION" value="sqlite"/>
        <env name="DATABASE_URL" value="localhost"/>
        <env name="DB_DATABASE" value=":memory:"/>
    </php>
</phpunit>

但由于某种原因，当我使用以下命令启动测试时：

1) Test\Database\Integration\Repositories\RoverRepositoryTest::testBasicSearch
Illuminate\Database\QueryException: SQLSTATE[08006] [7] FATAL:  password authentication failed for user "laravel" (SQL: select tablename from pg_catalog.pg_tables where schemaname = 'public')

/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:664
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:624
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:333
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Schema/PostgresBuilder.php:108
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Schema/PostgresBuilder.php:35
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/FreshCommand.php:79
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/FreshCommand.php:46
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:32
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:90
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:34
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/Container.php:576
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Command.php:183
/var/www/html/vendor/symfony/console/Command/Command.php:255
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Command.php:170
/var/www/html/vendor/symfony/console/Application.php:921
/var/www/html/vendor/symfony/console/Application.php:273
/var/www/html/vendor/symfony/console/Application.php:149
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Application.php:90
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Application.php:182
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php:275
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:136
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:220
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/Concerns/InteractsWithConsole.php:56
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/RefreshDatabase.php:55
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/RefreshDatabase.php:18
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:105
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:72
/var/www/html/tests/Database/Integration/Repositories/RoverRepositoryTest.php:31

Caused by
PDOException: SQLSTATE[08006] [7] FATAL:  password authentication failed for user "laravel"

/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php:70
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php:46
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connectors/PostgresConnector.php:33
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connectors/ConnectionFactory.php:182
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:918
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:943
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:399
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:325
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:657
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:624
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php:333
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Schema/PostgresBuilder.php:108
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Schema/PostgresBuilder.php:35
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/FreshCommand.php:79
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/FreshCommand.php:46
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:32
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:90
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:34
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/Container.php:576
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Command.php:183
/var/www/html/vendor/symfony/console/Command/Command.php:255
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Command.php:170
/var/www/html/vendor/symfony/console/Application.php:921
/var/www/html/vendor/symfony/console/Application.php:273
/var/www/html/vendor/symfony/console/Application.php:149
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Application.php:90
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Application.php:182
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php:275
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:136
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:220
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/Concerns/InteractsWithConsole.php:56
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/RefreshDatabase.php:55
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/RefreshDatabase.php:18
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:105
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:72
/var/www/html/tests/Database/Integration/Repositories/RoverRepositoryTest.php:31

ERRORS!
Tests: 1, Assertions: 0, Errors: 1.

对于生产设置，我将以下 .env 文件用于 thw 数据库：

DB_CONNECTION=pgsql
DB_HOST=postgresql
DB_PORT=5432
DB_DATABASE=laravel
DB_USERNAME=laravel
DB_PASSWORD=IDontTellYouThisIsNotAnActuallPassword

所以我有两个问题：

为什么我的 sqlite 设置被导入？
如何在测试时强制使用 inmemory sqlite？

编辑 1

我制作了一个名为.env.testing的文件：

DB_CONNECTION=sqlite
DATABASE_URL=localhost
DB_DATABASE=:memory:

并将我的phpunit.xml 更改为：

<?xml version="1.0" encoding="UTF-8"?>
<phpunit backupGlobals="false"
         backupStaticAttributes="false"
         bootstrap="vendor/autoload.php"
         colors="true"
         convertErrorsToExceptions="true"
         convertNoticesToExceptions="true"
         convertWarningsToExceptions="true"
         processIsolation="false"
         stopOnFailure="false">
    <testsuites>
        <testsuite name="Unit">
            <directory suffix="Test.php">./tests/Unit</directory>
        </testsuite>

        <testsuite name="Feature">
            <directory suffix="Test.php">./tests/Feature</directory>
        </testsuite>
        <testsuite name="Database">
            <directory suffix="Test.php">./tests/Database</directory>
        </testsuite>
    </testsuites>
    <filter>
        <whitelist processUncoveredFilesFromWhitelist="true">
            <directory suffix=".php">./app</directory>
        </whitelist>
    </filter>
    <php>
        <env name="APP_ENV" value="testing"/>
        <env name="BCRYPT_ROUNDS" value="4"/>
        <env name="CACHE_DRIVER" value="array"/>
        <env name="MAIL_DRIVER" value="array"/>
        <env name="QUEUE_CONNECTION" value="sync"/>
        <env name="SESSION_DRIVER" value="array"/>
    </php>
</phpunit>

laravel 中 sqlite 的设置还有：

'sqlite' => [
            'driver' => 'sqlite',
            'url' => env('DATABASE_URL'),
            'database' => env('DB_DATABASE', database_path('database.sqlite')),
            'prefix' => '',
            'foreign_key_constraints' => env('DB_FOREIGN_KEYS', true),
        ],

编辑 2

我按照建议尝试了：

namespace  Test\Database\Integration\Repositories;

use Tests\TestCase;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\DatabaseMigrations;
use App\Repositories\RoverRepository;
use App\Model\Rover;
use App\Model\Grid;

class RoverRepositoryTest extends TestCase
{
    use RefreshDatabase;
    use DatabaseMigrations;

    /**
     * Undocumented variable
     *
     * @var RoverRepository|null
     */
    private $repository=null;

    /**
     * Undocumented variable
     *
     * @var Grid|null;
     */
    private $grid=null;

    public function setUp(): void
    {
        parent::setUp();

        $this->runDatabaseMigrations();

        $grid=factory(Grid::class)->create([
            'width'=>5,
            'height'=>5
        ]);

        $rover=factory(Rover::class, 5)->create([
            'grid_id' => $grid->id,
            'grid_pos_x' => rand(0, $grid->width),
            'grid_pos_y' => rand(0, $grid->height),
        ]);

        $this->grid=$grid;
        //How do I run Migrations and generate the db?

        $this->repository = new RoverRepository();
    }

    public function tearDown(): void
    {
        parent::tearDown();
        //How do I nuke my Database?
    }

   /**
     * Testing Base Search
     *
     * @return void
    */
    public function testBasicSearch(): void
    {
        $this->assertTrue(true);
    }
}

然后我运行以下命令：

php artisan config:clear
php artisan config:clear --env=testing
php artisan config:clear --env=development
php artisan config:cache

错误仍然存在。

编辑 3

经过大量测试后，我清空了.env 文件。然后我运行命令：

php artisan config:cache

而且错误变成了：

PHPUnit 7.5.13 by Sebastian Bergmann and contributors.

E                                                                   1 / 1 (100%)

Time: 111 ms, Memory: 18.00 MB

There was 1 error:

1) Test\Database\Integration\Repositories\RoverRepositoryTest::testBasicSearch
Mockery\Exception\BadMethodCallException: Received Mockery_1_Illuminate_Console_OutputStyle::askQuestion(), but no expectations were specified

/var/www/html/vendor/symfony/console/Style/SymfonyStyle.php:222
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Command.php:332
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/ConfirmableTrait.php:31
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/FreshCommand.php:34
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:32
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:90
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:34
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/Container.php:576
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Command.php:183
/var/www/html/vendor/symfony/console/Command/Command.php:255
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Command.php:170
/var/www/html/vendor/symfony/console/Application.php:921
/var/www/html/vendor/symfony/console/Application.php:273
/var/www/html/vendor/symfony/console/Application.php:149
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Application.php:90
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Application.php:182
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php:275
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:136
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:220
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/Concerns/InteractsWithConsole.php:56
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/RefreshDatabase.php:55
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/RefreshDatabase.php:18
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:105
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:72

另外，如果我只保留 sqlite 设置并恢复到原来的 .env，我会收到错误：

PHPUnit 7.5.13 by Sebastian Bergmann and contributors.

E                                                                   1 / 1 (100%)

Time: 115 ms, Memory: 18.00 MB

There was 1 error:

1) Test\Database\Integration\Repositories\RoverRepositoryTest::testBasicSearch
InvalidArgumentException: Database [pgsql] not configured.

/var/www/html/vendor/laravel/framework/src/Illuminate/Database/DatabaseManager.php:152
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/DatabaseManager.php:115
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/DatabaseManager.php:86
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/FreshCommand.php:77
/var/www/html/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/FreshCommand.php:46
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:32
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:90
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:34
/var/www/html/vendor/laravel/framework/src/Illuminate/Container/Container.php:576
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Command.php:183
/var/www/html/vendor/symfony/console/Command/Command.php:255
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Command.php:170
/var/www/html/vendor/symfony/console/Application.php:921
/var/www/html/vendor/symfony/console/Application.php:273
/var/www/html/vendor/symfony/console/Application.php:149
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Application.php:90
/var/www/html/vendor/laravel/framework/src/Illuminate/Console/Application.php:182
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php:275
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:136
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/PendingCommand.php:220
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/Concerns/InteractsWithConsole.php:56
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/DatabaseMigrations.php:16
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:109
/var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:72

这意味着如果提供了.env，.env.testing 将被完全忽略。

【问题讨论】：

标签： php laravel sqlite phpunit environment-variables

【解决方案1】：

在实现 SQLite 数据库进行测试时，不需要指定数据库 URL，因为它是在内存中运行的。

从 phpunit.xml 中删除该行

<env name="DATABASE_URL" value="localhost"/>

您的配置可能正在缓存。运行命令

php artisan config:clear

现在重新运行测试。

从 setUp() 函数中删除代码

$this->runDatabaseMigrations();

要迁移SQLite中的数据库，可以使用

use Illuminate\Foundation\Testing\DatabaseMigrations;

编辑：对于 config/database.php

使用SQLite需要在database.php中进行配置。

//config/database.php 
...
'sqlite' => [
    'driver' => 'sqlite',
    'database' => storage_path('database/database.sqlite'),
    'prefix' => '',
    'foreign_key_constraints' => env('DB_FOREIGN_KEYS', true),
    ],
...

【讨论】：

我删除了$this->runDatabaseMigrations(); 并使用了use Illuminate\Foundation\Testing\DatabaseMigrations;，但错误仍然存在。
尝试从config/database.php中删除sqlite的url键值

【解决方案2】：

您的测试似乎仍在使用 sql 数据库。

在使用 SQLite 数据库进行测试时，我建议您验证以下内容：

你的database.sqlite必须在database文件夹下创建，别忘了调整文件权限。
您必须包含以下 2 个特征：

// this trait is used to wrap every query in a transaction where this one will be deleted at the end of the test
use DatabaseTransactions;

// this one allow Laravel to prepare the database
use DatabaseMigrations;

如果还是不行，我建议你停止你的服务器，执行当前的工匠命令php artisan config:clear并重新启动它。

编辑

我刚刚看到你的 phpunit.xml 包含一些错误，删除所有 env 标签并只添加这些：

<env name="DB_CONNECTION" value="sqlite"/>
<env name="DB_DATABASE" value=":memory:"/>
<env name="APP_ENV" value="testing"/>
<env name="CACHE_DRIVER" value="array"/>
<env name="MAIL_DRIVER" value="array"/>
<env name="QUEUE_DRIVER" value="sync"/>
<env name="SESSION_DRIVER" value="array"/>

不需要创建 .env.testing

【讨论】：

刚刚看到你的 XML 文件，我已经编辑了我的答案，现在应该可以正常工作了
保持.env 的这些设置仍然存在。

【解决方案3】：

确保您的 .env 文件与您的数据库具有相同的密码。

【讨论】：

但是在sqlite 上没有这样的密码选项，而在 postgresql 上有。
你如何登录到你的数据库？

【解决方案4】：

我遇到了同样的问题。

我搜索并看到了这个主题。

我想把答案放在以后的搜索中。

我尝试了很多东西，过了一段时间，我明白在我的新 linux 操作系统上，我没有安装sqlite driver。

sudo apt-get install php-sqlite

在 Windows 上，只需删除 php.ini 中的 SQLite 扩展名，方法是删除该行之前的分号 ;。

所以问题简单地解决了。

【讨论】：

【解决方案5】：

您是否使用与.env 中指定的名称非常相同的任何环境变量？有时这些可能会导致与.env 中指定的内容发生巨大冲突。

在您的情况下，可能是通过将Homestead 或docker 与docker-compose 一起使用，在这些情况下设置一个唯一的前缀来标识它的使用是个好主意。例如，不使用 DB_CONNECTION 之类的名称，将其命名为 DOCKER_DB_CONNECTION，因此完全没有冲突。

如果是docker-compose，这也是个坏主意：

version: '3.1'
services:
  develop:
    image: ddesyllas/php-dev:dev-n-build
    volumes:
      - ".:/var/www/html"
      - "./.laravel.env:/var/www/html/.env"
    links:
      - memcache
    environment:
      DB_CONNECTION: pgsql
      DB_HOST : postgresql
      DB_PORT : 5432
      DB_DATABASE: ${DOCKER_POSTGRES_DB}
      DB_USERNAME: ${DOCKER_POSTGRES_USER}
      DB_PASSWORD: ${DOCKER_POSTGRES_PASSWORD}

  nginx:
    image: nginx:alpine
    ports:
      - 7880:7880
    links:
      - "develop:develop"
    volumes:
      - ".:/var/www/html"
      - "./docker/nginx.conf:/etc/nginx/nginx.conf:ro"


  postgresql:
    image: postgres:alpine
    volumes:
      - './docker/misc_volumes/postgresql:/var/lib/postgresql/data'
    environment:
      POSTGRES_USER: ${DOCKER_POSTGRES_USER}
      POSTGRES_DB: ${DOCKER_POSTGRES_DB}
      POSTGRES_PASSWORD: ${DOCKER_POSTGRES_PASSWORD}

  memcache:
    image: memcached:alpine

改为使用以下docker-compose.yml 中指定的环境变量名称是个好主意：

version: '3.1'
services:
  develop:
    image: ddesyllas/php-dev:dev-n-build
    volumes:
      - ".:/var/www/html"
      - "./.laravel.env:/var/www/html/.env"
    links:
      - memcache
    environment:
      DOCKER_DB_CONNECTION: pgsql
      DOCKER_DB_HOST : postgresql
      DOCKER_DB_PORT : 5432
      DOCKER_DB_DATABASE: ${DOCKER_POSTGRES_DB}
      DOCKER_DB_USERNAME: ${DOCKER_POSTGRES_USER}
      DOCKER_DB_PASSWORD: ${DOCKER_POSTGRES_PASSWORD}

  nginx:
    image: nginx:alpine
    ports:
      - 7880:7880
    links:
      - "develop:develop"
    volumes:
      - ".:/var/www/html"
      - "./docker/nginx.conf:/etc/nginx/nginx.conf:ro"


  postgresql:
    image: postgres:alpine
    volumes:
      - './docker/misc_volumes/postgresql:/var/lib/postgresql/data'
    environment:
      POSTGRES_USER: ${DOCKER_POSTGRES_USER}
      POSTGRES_DB: ${DOCKER_POSTGRES_DB}
      POSTGRES_PASSWORD: ${DOCKER_POSTGRES_PASSWORD}

  memcache:
    image: memcached:alpine

你有没有注意到我像这样重命名了环境变量：

DB_CONNECTION => DOCKER_DB_CONNECTION
DB_HOST => DOCKER_DB_HOST
DB_PORT => DOCKER_DB_PORT
DB_DATABASE => DOCKER_DB_DATABASE
DB_USERNAME => DOCKER_DB_USERNAME
DB_PASSWORD => DOCKER_DB_PASSWORD

【讨论】：