Laravel迁移:从现有外键中删除onDelete('cascade') [英] Laravel migration : Remove onDelete('cascade') from existing foreign key

问题描述

我已经创建了这样的迁移:

I have created a migration like this :

// ...
$table->foreign('a')->references('b')->on('c')->onDelete('cascade');
// ...

我想在新迁移中删除onDelete('cascade')而不会破坏任何内容.我该怎么办?

I want to remove the onDelete('cascade') in a new migration without breaking anything. How can I do that ?

推荐答案

您可以尝试删除旧的外键并添加，然后添加一个不带onDelete的新外键:

You can try to remove the old foreign key and add then add a new one without onDelete:

$table->dropForeign('tablename_a_foreign');
$table->foreign('a')->references('b')->on('c');

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