Python Flask getlist of checkboxes returns empty list

Question

I am using an html table to display some data with checkboxes as the first column, so the user can select multiple rows and delete them simultaneously. The html code to create the checkboxes is this:

<td>
    <input type="checkbox" name="checkbox{{row .index}}"
        value={{row .index}}>
    {{row .like}}
</td>

I'm trying to get a list of all the indexes of the selected rows, so I can pass them on to a function which will delete the rows from the database. Currently I'm just using these two lines to get the list, but I get an empty list every time:

    print(request.form.getlist('checkbox'))
    return 'Done'

Do I have a stupid mistake somewhere? PS. I have almost the entire html doc on one form, because it's a quite simple page and just makes things easier.

Answer 1

The problem is with the names of your checkbox options. They are all different as you are using a variable. Try using this name:

name="checkbox"

in this line of your code:

<input type="checkbox" name="checkbox{{row .index}}"

Answer 2

I finally got it to work. IoaTzimas answer was one of the things, but the ['<built-in'] problem was fixed by changing value={{row .index}} to value={{data.index(row)}}. It's quite obvious actually, because the index of row is searched for in the list 'data'. Small mistake. Thanks for the help!