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

并且我需要通过 id = 3 删除段落，因此以下内容完全删除了记录:

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.我尝试使用 delete 和 destroy.这两种方法都从关联的表中完全删除记录.我怎样才能从容器"中删除它们?

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

你不应该在 Paragraph 对象上使用 delete 方法，而是使用paragraphs 关系，像这样:

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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