html - 检测将在 Ruby on Rails 中呈现为空的字符串

Question

我有一个以 HTML 格式发送数据的富文本字段。我想将它存储在数据库中，但前提是它实际上会呈现为某种东西。

例子:

"hello world" => true
"<br><b></b>" => false
"<br><b>How are you today?</b>" => true

Answer 1

检查 ActionView::Base.full_sanitizer.sanitize 的输出是否为空:

ActionView::Base.full_sanitizer.sanitize("<b>").blank?
# => true
ActionView::Base.full_sanitizer.sanitize("<b> </b>").blank?
#=> true
ActionView::Base.full_sanitizer.sanitize("<b>a</b>").blank?
#=> false

https://stackoverflow.com/a/31180237/580346