通过laravel连接Postgresql数据库时出现的问题

Question

我很难用pgsql设置laravel 5.3（在wamp/windows上运行）。当我尝试使用“php artisan migrate”迁移表时，出现了一个错误“PDO异常-找不到驱动程序”

1. 我安装了postgres 9.6。
2. 我启用了postgresql的php扩展：

    $dbh = new PDO("pgsql:dbname=rotocms;host=127.0.0.1", "postgres", "mypassword");

    if($dbh){
     echo "connected";
    }else{
     echo 'there has been an error connecting';
    }

所以我被卡住了，无法在laravel进行迁移工作。我的. env：

    DB_CONNECTION=pgsql
    DB_HOST=127.0.0.1
    DB_PORT=5432
    DB_DATABASE=mydatabasename
    DB_USERNAME=postgres
    DB_PASSWORD=password

以下是laravel错误堆栈：

    local.ERROR: PDOException: could not find driver in C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php:119
Stack trace:
#0 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php(119): PDO->__construct('pgsql:host=127....', 'postgres', 'password', Array)
#1 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php(56): Illuminate\Database\Connectors\Connector->createPdoConnection('pgsql:host=127....', 'postgres', 'password', Array)
#2 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Connectors\PostgresConnector.php(36): Illuminate\Database\Connectors\Connector->createConnection('pgsql:host=127....', Array, Array)
#3 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Connectors\ConnectionFactory.php(100): Illuminate\Database\Connectors\PostgresConnector->connect(Array)
#4 [internal function]: Illuminate\Database\Connectors\ConnectionFactory->Illuminate\Database\Connectors\{closure}()
#5 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Connection.php(964): call_user_func(Object(Closure))
#6 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Connection.php(832): Illuminate\Database\Connection->getPdo()
#7 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Connection.php(717): Illuminate\Database\Connection->reconnectIfMissingConnection()
#8 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Connection.php(350): Illuminate\Database\Connection->run('select * from i...', Array, Object(Closure))
#9 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Schema\PostgresBuilder.php(25): Illuminate\Database\Connection->select('select * from i...', Array)
#10 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Migrations\DatabaseMigrationRepository.php(156): Illuminate\Database\Schema\PostgresBuilder->hasTable('migrations')
#11 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Migrations\Migrator.php(515): Illuminate\Database\Migrations\DatabaseMigrationRepository->repositoryExists()
#12 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Console\Migrations\MigrateCommand.php(92): Illuminate\Database\Migrations\Migrator->repositoryExists()
#13 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Database\Console\Migrations\MigrateCommand.php(58): Illuminate\Database\Console\Migrations\MigrateCommand->prepareDatabase()
#14 [internal function]: Illuminate\Database\Console\Migrations\MigrateCommand->fire()
#15 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Container\Container.php(508): call_user_func_array(Array, Array)
#16 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Console\Command.php(169): Illuminate\Container\Container->call(Array)
#17 C:\wamp64\www\myproject\vendor\symfony\console\Command\Command.php(256): Illuminate\Console\Command->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#18 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Console\Command.php(155): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#19 C:\wamp64\www\myproject\vendor\symfony\console\Application.php(820): Illuminate\Console\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#20 C:\wamp64\www\myproject\vendor\symfony\console\Application.php(187): Symfony\Component\Console\Application->doRunCommand(Object(Illuminate\Database\Console\Migrations\MigrateCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#21 C:\wamp64\www\myproject\vendor\symfony\console\Application.php(118): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#22 C:\wamp64\www\myproject\vendor\laravel\framework\src\Illuminate\Foundation\Console\Kernel.php(121): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#23 C:\wamp64\www\myproject\artisan(35): Illuminate\Foundation\Console\Kernel->handle(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#24 {main}  

另外，phpinfo（）中的PostgreSQL（libpq）版本是9.4.4，尽管我安装了PostgreSQL 9.6，但不确定这是否正确。。

Answer 1

您还必须在本地安装postgres驱动程序。在macOS上，您可以使用brew。

根据您的PHP版本（在终端中尝试PHP-v），使用以下命令：

brew install php71-pdo-pgsql
brew install php70-pdo-pgsql
brew install php55-pdo-pgsql

此外，如果您正在运行代客泊车，请确保在之后重新启动代客泊车。

Answer 2

你必须寻找一些东西，

确保在app/config/database.php中配置默认密钥

对于postgres，这将是'默认'=

检查是否安装了正确的PHP扩展。您需要安装并启用pdo_pgsql.so和pgsql.so。关于如何做到这一点的说明因操作系统而异。

取消注释扩展=pdo_pgsql.so和扩展=pgsql.so中的php.ini行

现在将libpq.dll从C:\wamp\bin\php\php5.*\复制到C:\wamp\bin\apache*\bin并重新启动所有服务。

如果问题仍然存在，请查看环境变量。

让我知道结果。

Answer 3

在config\database.php下是一个文件名database.php

这里像这样选择default topgsql

'default' => env('DB_CONNECTION', 'pgsql')

这里修改与您的所有细节

'pgsql' => [
            'driver' => 'pgsql',
            'host' => env('DB_HOST', 'localhost'),
            'port' => env('DB_PORT', '5432'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', ''),
            'charset' => 'utf8',
            'prefix' => '',
            'schema' => 'public',
            'sslmode' => 'prefer',
        ]

重新启动服务器，希望它能够连接