truncate all tables in laravel using eloquent

问题

Is there a way I could truncate all the tables in a db using eloquent or fluent in laravel 4? I do not want to specify table names, I just want to truncate all the tables. In other words empty all the tables.

回答1:

1. Get all the table names

$tableNames = Schema::getConnection()->getDoctrineSchemaManager()->listTableNames();

2. Loop through the array of table names and truncate with Schema Builder

foreach ($tableNames as $name) {
    //if you don't want to truncate migrations
    if ($name == 'migrations') {
        continue;
    }
    DB::table($name)->truncate();
}

回答2:

Here is my answer based on @Hao Luo. Moreover, it has these pros:

You do not need to install any extra package (no need for doctrine)
It supports laravel 5 very well
It disables foreign key constraint (If you truncate without caring about the orders and enables foreign key constraint, you will likely get an error)

Here is the code:

DB::statement("SET foreign_key_checks=0");
$databaseName = DB::getDatabaseName();
$tables = DB::select("SELECT * FROM information_schema.tables WHERE table_schema = '$databaseName'");
foreach ($tables as $table) {
    $name = $table->TABLE_NAME;
    //if you don't want to truncate migrations
    if ($name == 'migrations') {
        continue;
    }
    DB::table($name)->truncate();
}
DB::statement("SET foreign_key_checks=1");

Hope you like it! :)

回答3:

In laravel 5, migrate:fresh will drop all the tables in the database (even if tables aren't related to migrate)

回答4:

This is how i truncate all tables inside a database (including table exceptions), it works for me.

    // set tables don't want to trucate here
    $excepts = ['migrations'];
    $tables = DB::connection()
    ->getPdo()
    ->query("SHOW FULL TABLES")
    ->fetchAll();
    $tableNames = [];

    $keys = array_keys($tables[0]);
    $keyName = $keys[0];
    $keyType = $keys[1];

    foreach ($tableNames as $name) {
        //if you don't want to truncate migrations
        if (in_array($name[$keyName], $excepts))
            continue;

        // truncate tables only
        if('BASE TABLE' !== $name[$keyType])
            continue;

        \DB::table($name)->truncate();
    }

回答5:

Based on previous answers, I filter table names directly into the SQL query. I'm agree it's a small optimization but that avoids unnecessary loop.

protected function truncateDatabase($excepts = []): void
{
    $excepts = array_merge(['migrations'], $excepts);
    \DB::statement('SET foreign_key_checks=0');
    $table_names = \DB::query()->select('TABLE_NAME')->from('information_schema.tables')
        ->where('TABLE_SCHEMA', \DB::getDatabaseName())
        ->whereNotIn('TABLE_NAME', $excepts)
        ->get()
        ->pluck('TABLE_NAME')
        ->toArray();
    foreach ($table_names as $table_name) {
        \DB::table($table_name)->truncate();
    }
    \DB::statement('SET foreign_key_checks=1');
}

回答6:

Use this:

$tables = DB::select('SHOW TABLES');
// it do truncate all tables in database
   foreach($tables as $table){
      if ($table == 'migrations') {
          continue;
      }
      DB::table($table->Tables_in_portal_test)->truncate();
}

Remember you import