将列类型更改为 tinyInteger

Question

尝试在 Laravel 5.2 迁移中将数据列类型更改为 tinyInteger：

<?php

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

class AlterTableNameTableChangeNotificationSentTinyint extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('table_name', function ($table) {
            $table->tinyInteger('column_name')->default(0)->change();
        });    
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        //
    }
}

我遇到一个错误：

Doctrine\DBAL\DBALException]                                                                                                                                                              
  Unknown column type "tinyinteger" requested. Any Doctrine type that you use has to be registered with \Doctrine\DBAL\Types\Type::addType().         You can get a list of all the known types wit  
  h \Doctrine\DBAL\Types\Type::getTypesMap(). If this error occurs during database introspection then you might have forgot to register all database types for a Doctrine Type. Use Abstrac  
  tPlatform#registerDoctrineTypeMapping() or have your custom types     implement Type#getMappedDatabaseTypes(). If the type name is empty you might have a problem with the cache or forgot so  
  me mapping information.

我是不是做错了什么？

Answer 1

试试这个 Schema::table('table_name', 函数 (蓝图 $table) { $table->tinyInteger('column_name')->默认(0)->改变();

Answer 2

希望这能解决您的问题

DB::statement("ALTER TABLE table_name CHANGE COLUMN column_name column_name TINYINT UNSIGNED NOT NULL");

Answer 3

确实 Dbal 不支持 Doctrine tinyint 你可以阅读他们的文档 here

同样不幸的是，laravel 声明 tinyint 无法更改。检查 here

我需要有人证明这是错误的，因为我的一个项目因为这个问题而不得不使用 smallInteger。我在想也许 boolean() 可能是解决方案。不过我没试过。

Answer 4

这样做

Change tinyInteger to smallInteger

use Doctrine\DBAL\Types\Type;
use Doctrine\DBAL\Types\SmallIntType;


if (!Type::hasType('integer')) {
     Type::addType('integer', SmallIntType::class);
  }

Answer 5

我遇到了同样的问题并找到了这个 solution。它对我有用。但它向我提出了一个问题，为什么创作者不更新到 doctrine/dbal 包。也许这个解决方案在某些情况下会导致错误？希望有人在这个答案中解释。

Answer 6

可以使用boolean吗？

或

$table->smallInteger('column_name')->tinyInteger('column_name')->unsigned()->change();

Answer 7

如果您尝试将非数字列转换为 int 列，您将收到此错误。无法转换值。

在将旧字符串值转换为对父 table 的 id 引用时，您可能运行进入此状态。

与其尝试更改现有列，不如创建一个新列并删除旧列：

// Add new int column
Schema::table('children', function (Blueprint $table) {
    $table->unsignedTinyInteger('parent_id')->after('parent_slug');
});

// Convert old values to new
// Only runs on environments that already have data in db, by virtue of pulling all records from the parents table
foreach (\App\Parents::all() as $parent) {
    \App\Child::where('parent_slug', $parent->slug)->each(function ($child) use ($parent) {
        $child->update([ 'parent_id' => $parent->id ]);
    });
}

// Drop old string column
Schema::table('children', function (Blueprint $table) {
    $table->dropColumn('parent_slug');
});

Answer 8

This solution is only for empty tables. not if already populated.

只需删除并重新创建具有相同名称的列。

    public function up()
    {
        // Drop and recreate because laravel don't allow to change to the tinyInteger type 
        Schema::table('your_table_name', function (Blueprint $table) {
            $table->dropColumn(['rating']);
        });

        Schema::table('your_table_name', function (Blueprint $table) {
            $table->tinyInteger('rating')->nullable()->after('some_column_name');
        });
    }

将列类型更改为 tinyInteger

Change column type to tinyInteger

php

migration

laravel

laravel-5.2