How to add a field (Unit product: Pc / Box / kg / trip ...) to quote module

[pstevens]

How can add custom field save into database?

Of great importance is how you name the field, in the picture is my example of adding an custom field to the headings and it is saved in the database [custom_field_item_positions] in Database [positions]

Custom Field on Quotes Line Item

Guys, I need to add a custom field in the line item on quotes. I already tried to look at other posts.But didn’t find. I already created the field in the table and already modified the line_items.js but the field are no recorded in the table. I noticed that at the time of recording in the array $post_data on AOS_Products_Quotes.php the field are showing but appears valueless. Can anyone help me?