创建帖子时如何访问参数
这意味着，在 PostsController def create 中，我想访问在布尔值一致的列中传递的值。创建帖子时，有一个复选框可以设置该值。选中则同意为真 (1)，未选中则同意为假 (0)。现在我有代码 params[:post][:agree] 来访问这个值，但这似乎不起作用。 当我尝试在 if 语句中使用它时，该语句总是出现，就好像 params[:post][:agree] 总是评估为 true。
帮助！为什么这不起作用？
：编辑：
Post.rb（Post模型）
attr_accessor :agree
attr_accessible :agree
PostController（默认创建）
@post.title = "AGREED!!" if params[:post][:agree] == "1"
Meaning that, in PostsController, def create, I want to access the value that is passed in the column for the boolean value agree. When creating a post, there is a checkbox that sets this value. Checked makes agree true (1) and unchecked makes agree false (0). Right now I have the code params[:post][:agree] in order to access this value, but that doesn't seem to work.
When I try to use that in an if statement, the statement always occurs, as if params[:post][:agree] always evaluates to true.
Help! Why doesn't this work??
:EDIT:
Post.rb (Post Model)
attr_accessor :agree
attr_accessible :agree
PostController (In def create)
@post.title = "AGREED!!" if params[:post][:agree] == "1"
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评论（2）
在 Ruby 中，数字
0和字符串"0"在布尔上下文中都不会计算为false。尝试if (params[:post][:agree]=="1")In Ruby, neither the number
0nor the string"0"evaluates tofalsein a boolean context. Tryif (params[:post][:agree]=="1")Rails 默认情况下会创建一个复选框（使用
value="1"）和一个隐藏的输入元素（使用value="0"），因此您始终会获得一个值传回服务器，我个人认为这是愚蠢的并覆盖它。尝试检查params[:post][:agree].blank?是否正确。但我不完全确定我理解你的整个问题。您只谈论表单数据，还是谈论您的模型？
Rails, by default creates both a checkbox (with
value="1") and a hidden input element (withvalue="0"), so you always get a value passed back to the server, which personally I think is silly and override it. Try checking ifparams[:post][:agree].blank?instead.I'm not entirely sure I understand your entire question though. Were you only talking about the form data, or are you talking about your models?