Question

我正在使用laravel 5进行申请。我改变了字段＆＃39;投票＆＃39;我定义为

$ table-> enum ('vote', [ '- 1 ', '0 ', '1 ']);

并且应该如下

$ table-> enum ('vote', [' 1', ' 2', ' 3', ' 4', ' 5'] ) ;

Answer 1

为此，您应该按照以下步骤操作：

创建新的迁移文件

# my original answer
In [1]: %%timeit colors = np.random.randint(256, size=(11, 3)); labels = np.random.randint(11, size=(512, 512))                                                                                                                               
labels[..., None].choose(colors)
   ....: 
10 loops, best of 3: 52 ms per loop

# Divakar's answer
In [2]: %%timeit colors = np.random.randint(256, size=(11, 3)); labels = np.random.randint(11, size=(512, 512))
colors[labels.ravel()].reshape(labels.shape+(3,))
   ....: 
100 loops, best of 3: 4.44 ms per loop

# using take
In [3]: %%timeit colors = np.random.randint(256, size=(11, 3)); labels = np.random.randint(11, size=(512, 512))
colors.take(labels, axis=0)
   ....: 
The slowest run took 4.96 times longer than the fastest. This could mean that an 
intermediate result is being cached 
1000 loops, best of 3: 1.25 ms per loop

# using integer array indexing
In [4]: %%timeit colors = np.random.randint(256, size=(11, 3)); labels = np.random.randint(11, size=(512, 512))
   ....: colors[labels]
   ....: 
100 loops, best of 3: 4.19 ms per loop

打开新创建的迁移文件（app_folder \ database \ migrations {date_migrationfile_was_created} -update_votes_tables.php）
更改要更改的列

有关详细信息，请参阅documentation on database migrations

注意：如果您将迁移文件添加到问题中，我们可以提供更详细的帮助

Answer 2

这是我怎么做的：

 php artisan make:migration Alter_votes_to_tableName --table=tableName

打开文件然后将其更改

php artisan migrate

Answer 3

修改列将需要doctrine/dbal软件包。

安装软件包
```
composer require doctrine/dbal
```

创建迁移

php artisan make:migration add_values_to_vote_column_in_votes_table

更新迁移文件

Schema::table('votes', function (Blueprint $table) {
    $table->enum('vote', [' 1', ' 2', ' 3', ' 4', ' 5'])->change();
});

运行迁移
```
php artisan migrate
```

Documentation

Answer 4

首先使用以下命令创建新迁移

php artisan make:migration Alter_your_comment_yourTableName --table=yourTableName

根据需要更改文件，然后在composer中运行以下命令

php artisan migrate

使用迁移更改表Laravel 5

4 个答案: