Question

我在使用Laravel 5中的迁移和postgresql时遇到问题。这是在我对迁移文件执行任何操作之前执行表存在检查时。

/**
 * Reverse the migrations.
 *
 * @return void
 */
public function down()
{
    //@todo this is not work!
    if (Schema::hasTable($this->personSchema . 'person')) {
        Schema::table($this->personSchema . 'person', function (Blueprint $table) {
            $table->dropForeign('person_person_user_id_foreign');
        });
    }

    Schema::drop($this->accountsSchema . 'users');

    PGSchema::drop($this->accountsSchemaName);
}

某些检查不起作用，并且未执行该操作。

你能帮帮我吗？谢谢！

Answer 1

尝试将配置设置添加到此表单：

    /* ... */
    'driver'    => getenv('DB_CONNECTION'),
    'host'      => getenv('DB_HOST'),
    'database'  => getenv('DB_DATABASE'),
    'username'  => getenv('DB_USERNAME'),
    'password'  => getenv('DB_PASSWORD'),
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
    'schema'    => 'testing',
    'strict'    => true,
    /* ... */

我想问题是你使用“$ this-＆gt; schema”，而Laravel正试图找到一个名为“schema.scape”的表，而不是“schema”。“scape”，因此，并发生错误。尝试方案仅在配置文件中指定或在极端情况下，尝试使用DB :: raw（$ this-＆gt; schema。'。scape'）

例如：

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateTableTestscape extends Migration
{
private $schema = "testing";

/**
 * Run the migrations.
 *
 * @return void
 */
public function up()
{
    \Pacuna\Schemas\Facades\PGSchema::create($this->schema);

    if (!Schema::hasTable('scape')) {

        echo 'Creating table than not exists' . "\n";

        Schema::create('scape', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->timestampsTz();
        });
    }

    if (Schema::hasTable('scape')) {

        Schema::table('scape', function (Blueprint $table) {
            $table->integer('user_id')->unsigned();
        });


        echo 'Altering table and adding reference of foreign key' . "\n";

        Schema::table('scape', function (Blueprint $table) {
            $table->foreign('user_id')->references('id')->on('accounts.users');
        });
    }
}

/**
 * Reverse the migrations.
 *
 * @return void
 */
public function down()
{
    echo 'Deleting at all data' . "\n";

    Schema::dropIfExists('scape');

    \Pacuna\Schemas\Facades\PGSchema::drop($this->schema);
}
}

Laravel将从配置中获取该方案并将其添加到所需的表中。源代码Laravel为PostgreSQL提供了以下代码：

public function hasTable($table)
{
    $sql = $this->grammar->compileTableExists();

    $schema = $this->connection->getConfig('schema');

    if (is_array($schema)) {
        $schema = head($schema);
    }

    $table = $this->connection->getTablePrefix().$table;

    return count($this->connection->select($sql, [$schema, $table])) > 0;
}

Answer 2

我的朋友@Самуил-Клад，我将如何使用迁移文件进行尝试。

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateTableTestscape extends Migration
{
    private $schema = "testing";

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        \Pacuna\Schemas\Facades\PGSchema::create($this->schema);

        if (!Schema::hasTable($this->schema . '.scape')) {

            echo 'Creating table than not exists' . "\n";

            Schema::create($this->schema . '.scape', function (Blueprint $table) {
                $table->increments('id');
                $table->string('name');
                $table->timestampsTz();
            });
        }

        if (Schema::hasTable($this->schema . '.scape')) {

            echo 'Creating user_id foreign key' . "\n";

            Schema::table($this->schema . '.scape', function (Blueprint $table) {
                $table->integer('user_id')->unsigned();
            });


            echo 'Altering table and adding reference of foreign key' . "\n";

            Schema::table($this->schema . '.scape', function (Blueprint $table) {
                $table->foreign('user_id')->references('id')->on('accounts.users');
            });
        }
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        echo 'Deleting at all data' . "\n";

        Schema::dropIfExists($this->schema . '.scape');

        \Pacuna\Schemas\Facades\PGSchema::drop($this->schema);
    }
}

但未创建user_id列。

发生了什么事？

下面有截图。

为什么laravel 5迁移在PostgreSQL的某些情况下无法正常工作？

2 个答案: