Rails - 用 2 个字段查找? [英] Rails - Find By with 2 fields?

问题描述

我在控制器中有以下内容

I have the following in a controller

def update
    @permission = Permission.find_by_user_id(params[:user_id])

但我希望它也能通过另一个参数找到，project_id

But I want it to also find by another param, project_id

我怎样才能在 Rails 中做这样的事情?

How can I do something like this in Rails?

@permission = Permission.find_by_user_id_and_project_id(params[:user_id],params[:user_id])

推荐答案

Rails 4 引入了 find_by 方法:

Rails 4 introduces the find_by method:

Permission.find_by(user_id: params[:user_id], project_id: params[:project_id])

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