驗證輸入文本軌道

Question

如何使文本字段只接受滑軌中的字母，通過鍵盤輸入數字並且不反映在輸入中。對於服務器 I'm使用客戶端驗證

Answer 1

validates_format_of :atr, :table, :with => /^[a-z]+$/i 

/^ [A-Z] + $/I 將僅僅允許字母。以下是正則表達式的細節。

https://apidock.com/rails/ActiveModel/Validations/HelperMethods/validates_format_of

^  => Start of line 
[a-z] => Any single character in the range a-z 
+  => One or more characters of the range 
$  => End of line 
i  => To make case insensitive