cakePHP 3 Query ifnull

Question

I wonder what would be the best way to prevent null results in a ResultSet. I\'m on cake 3.5.13 and I\'m using cases, like:

private function addCase($isforeign,         


        

Answer 1

The functions builder can create any function you want, you just need to call it, and the magic method call handler of the builder will create a generic function call in case there is no concrete method implemented, ie func()->ifnull() will just work.

However, IFNULL is MySQL/SQLite specific, so in order to keep things as portable as possible, I'd suggest to simply use an ELSE case instead, one that selects 0 instead of NULL in case the conditions evaluate to FALSE.

$query
    ->newExpr()
    ->addCase(
        [
            $query->newExpr()->add([
                'Sales.isforeign' => $isforeign,
                'Sales.source' => $source
            ])
        ],
        [1, 0],
        ['integer', 'integer']
    );

That should generate SQL similar to:

CASE WHEN (Sales.isforeign = 0 AND Sales.source = 1) THEN 1 ELSE 0 END

See also

• Cookbook > Database Access & ORM > Query Builder > Using SQL Functions
• Cookbook > Database Access & ORM > Query Builder > Using SQL Functions > Case Statements