Postgres error: null value in column "id" - during insert operation

I use postgresql and yii2 framework. Well I got a very interesting error message: SQLSTATE[23502]: Not null v

Charis

0 1 0 9

asked 07 September, 2021

Is there a VB.NET equivalent for C#'s '??' operator?

Is there a VB.NET equivalent for C#'s ?? operator?

Winford

0 1 0 9

asked 07 September, 2021

Setting Objects to Null/Nothing after use in .NET

Should you set all the objects to null (Nothing in VB.NET) once you have finished with them? I understand th

Thurman

0 1 0 9

asked 07 September, 2021

What is a NullReferenceException, and how do I fix it?

Nidia

0 1 0 9

asked 07 September, 2021

Avoiding NullPointerException in Java

I use object != null a lot to avoid NullPointerException. What is an alternative to: if (someobject != null) {

Serina

0 1 0 9

asked 07 September, 2021

How to select rows where column value IS NOT NULL using CodeIgniter's ActiveRecord?

I'm using CodeIgniter's Active Record class to query the MySQL database. I need to select the rows i

Arline

0 1 0 9

asked 07 September, 2021

How can I determine if a variable is 'undefined' or 'null'?

How do I determine if variable is undefined or null? My code is as follows: var EmpName = $("div#esd-names d

Hilario

0 1 0 9

asked 07 September, 2021

How can I check for an empty/undefined/null string in JavaScript?

I saw this question, but I didn't see a JavaScript specific example. Is there a simple string.Empty avail

Elicia

0 1 0 9

asked 07 September, 2021