Laravelのマイグレーション

Question

php artisan make:migration create_tasks_table --create=tasks
php artisan make:migration create_tasks_table
この2つの違いはなんなのでしょうか?
作成されたファイルを見比べてもわかりません。

Answer 1

ちょっと気になったのでlaravelのソースを追いかけました

MigrateMakeCommand.php(抜粋)

    /**
     * Execute the console command.
     *
     * @return void
     */
    public function handle()
    {
        // It's possible for the developer to specify the tables to modify in this
        // schema operation. The developer may also specify if this table needs
        // to be freshly created so we can create the appropriate migrations.
        $name = Str::snake(trim($this->input->getArgument('name')));

        $table = $this->input->getOption('table');

        $create = $this->input->getOption('create') ?: false;

        // If no table was given as an option but a create option is given then we
        // will use the "create" option as the table name. This allows the devs
        // to pass a table name into this option as a short-cut for creating.
        if (! $table && is_string($create)) {
            $table = $create;

            $create = true;
        }

        // Next, we will attempt to guess the table name if this the migration has
        // "create" in the name. This will allow us to provide a convenient way
        // of creating migrations that create new tables for the application.
        if (! $table) {
            [$table, $create] = TableGuesser::guess($name);
        }

        // Now we are ready to write the migration out to disk. Once we've written
        // the migration out, we will dump-autoload for the entire framework to
        // make sure that the migrations are registered by the class loaders.
        $this->writeMigration($name, $table, $create);

        $this->composer->dumpAutoloads();
    }

---

--create=tasksがあったら

        if (! $table && is_string($create)) {
            $table = $create;

            $create = true;
        }

ここの処理で$tableにtasksが、$crateにtrueが入る

---

--create=tasksがなかったら

        if (! $table) {
            [$table, $create] = TableGuesser::guess($name);
        }

ここに行く($nameはcreate_tasks_table)

TableGuesser.php

<?php

namespace Illuminate\Database\Console\Migrations;

class TableGuesser
{
    const CREATE_PATTERNS = [
        '/^create_(\w+)_table$/',
        '/^create_(\w+)$/',
    ];

    const CHANGE_PATTERNS = [
        '/_(to|from|in)_(\w+)_table$/',
        '/_(to|from|in)_(\w+)$/',
    ];

    /**
     * Attempt to guess the table name and "creation" status of the given migration.
     *
     * @param  string  $migration
     * @return array
     */
    public static function guess($migration)
    {
        foreach (self::CREATE_PATTERNS as $pattern) {
            if (preg_match($pattern, $migration, $matches)) {
                return [$matches[1], $create = true];
            }
        }

        foreach (self::CHANGE_PATTERNS as $pattern) {
            if (preg_match($pattern, $migration, $matches)) {
                return [$matches[2], $create = false];
            }
        }
    }
}

self::CREATE_PATTERNSに引っかかるので
return [$matches[1], $create = true];
により戻り値が['tasks', true]になる

よって全く同じになる。

Comments

[ibu]

ありがとうございます!
本当に一緒だったのですね笑
今まで適当にオプション付けていたのですがスッキリしました!