AJAX php代码插入NULL而不是输入值到数据库

Question

I am trying to insert 2 values interchangeably to my database - my Select element with name=toctquantsel and my Input element with name=toctquant. When my Select element is hidden, the value of my Input will be inserted to the database, and vise versa. I was able to achieve with my php code alone, however when doing this with AJAX, I get the error message, "Uncaught mysqli_sql_exception: Column 'toctquant' cannot be null". Again, I did not get this error when not using AJAX. How do I fix this so I can insert my values to the database without having to change my database columns to NULL?

Answer 1

When you submit the form normally, the form fields will be put in $_POST['toctquantsel]and$_POST['toctquant']`. In your AJAX call, you have

data: {selectValueBox: selectValue, inputValueBox: inputValue},

When you use AJAX, the parameter names sent to PHP come from the data: object, not the names of the form fields. So these fields will be in $_POST['selectValueBox'] and $_POST['inputValueBox']. To make your AJAX code work with the same PHP code on the server, you need to change that to:

data: {toctquantsel: selectValue, toctquant: inputValue},