php - 使用查询构建器在 Laravel 中添加全文索引

Question

这是在 MySQL 中添加全文索引的查询：

ALTER TABLE `TableName`
ADD FULLTEXT INDEX `IndexName` (`ColumnName`);

但是如何使用 Laravel 查询生成器添加全文索引？

Answer 1

这应该这样做：DB::statement

DB::statement('ALTER TABLE TableName ADD FULLTEXT INDEX IndexName (ColumnName)');

Answer 2

在 Laravel >= 6.15.0 上，你可以像这样扩展Illuminate\Database\Schema\Grammars\MySqlGrammar和Illuminate\Database\Schema\Blueprint类（例如在boot()你的方法上AppServiceProvider）：

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Schema\Grammars\MySqlGrammar;
use Illuminate\Support\Fluent;

Blueprint::macro('fulltext', function ($columns, $name = null, $algorithm = null)
{
    return $this->indexCommand('fulltext', $columns, $name, $algorithm);
});

Blueprint::macro('dropFulltext', function ($index)
{
    return $this->dropIndexCommand('dropIndex', 'fulltext', $index);
});

MySqlGrammar::macro('compileFulltext', function (Blueprint $blueprint, Fluent $command)
{
    return $this->compileKey($blueprint, $command, 'fulltext');
});

并像这样在您的迁移中使用它：

Schema::table('flights', function (Blueprint $table) {
    $table->fulltext(['name', 'airline']);
});

//reverse the migration
Schema::table('flights', function (Blueprint $table) {
    $table->dropFulltext(['name', 'airline']);
});

Answer 3

For multiple Columns/Fields

DB::statement('ALTER TABLE Database.TableName ADD FULLTEXT fulltext_index (Col_1, col_2, col_3)');