CODEWITHSUNDEEP
androidflutter
abrev
abrev

Reputation: 325

Flutter: show another value when value is null

I have an app which has a list and when its empty it shows "null", but i wanted to show nothing instead of it but i can't. I have tried to make a verification but it still showing null for some reason.

Here is the code:

   child: Text(
                                  produtosList1.isEmpty ||
                                          produtosList1[index].qtd == "" ||
                                          produtosList1[index].qtd == null
                                      ? " " 
                                      : produtosList1[index].qtd,
                                  style: TextStyle(fontWeight: FontWeight.bold),
                                ),

But here is how it shows:

enter image description here

What am i doing wrong?

Upvotes: 1

Views: 894

Answers (2)

Andrej
Andrej

Reputation: 3225

If you have a variable that can be null you can do this to show something else instead of it: produtosList1[index].qtd ?? 'Instead of null'.

?? returns the expression on its left unless that expression’s value is null, in which case it evaluates and returns the expression on its right.

Upvotes: 0

Huthaifa Muayyad
Huthaifa Muayyad

Reputation: 12353

Add this check also to your || produtosList1[index].qtd == "null".

Your app is displaying null and not an empty string "" because most likely the value in qtd is a String "null".

Upvotes: 1

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