Fields in CakePHP could not be referred by JQuery -

I have found a simple HTML form with a field:

The code could not work,
I think it might be the name of the input text field, causing the problem to occur,
But I do not know how to To change
because it is a naming convention in KHHHP.

The answer is:

If you use any meta-character You want to use ( #; & amp;; + * ~ ': "! ^ $ [] () = & Gt; | / ) As a literal part of a name, you For example, if you have an input with name = "names []," , you select the selector Can use $ ("input [name = names \\ [\\]]") .

case: $ ("input [name = \\ [user \\] \\ [user_id \\]] ")

although I think By default the cake form assistant creates an element in this way:

  & lt; input type = "text" name = "data [user] [user_id] "Id =" UserUserId "value =" 1 "& gt;  

There is no ' in the name and the id is easily selectable.