从has_many中删除对象但不删除Rails中的原始记录？ [英] Remove object from has_many but don't delete the original record in Rails?

问题描述

我有这个：

Post.paragraphs << new_paragraph

我需要删除段落id = 3，因此下面的记录完全删除： / p>

And I need to remove paragraph by id = 3, so the following deletes the record completely:

Post.paragraphs.find(paragraph_id).destroy
# or
Post.paragraphs.find(paragraph_id).delete

我只需要从has_many关联中删除一个段落。我试图使用 delete 和 destroy 。两种方法都完全从关联的表中删除记录。

I just need to remove a paragraph from has_many association. I tried to use delete and destroy. Both methods completely delete records from the associated tables. How can I just remove them from the "container"?

推荐答案

您不应该使用 delete 对象，但是使用段关系的delete方法，

You should not use the delete method on the Paragraphobject, but instead use the delete method of paragraphs relation, like this:

post.paragraphs.delete(Paragraph.find(paragraph_id))

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