Using where query if data is not null [closed] - php

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I have this query
$something = Something::where('height, '>=', $request->heightMin)
->where('height, '<=', $request->heightMax)
->get();
It works but what if I want to use field age. This filed isn't require so I may have value (int) or null. So if i had value "null", I want this field to be ignored. How can I do that?

Answer 1

You can use when to only apply the query when the value exists in the request.
From the docs:
Sometimes you may want clauses to apply to a query only when something
else is true. For instance you may only want to apply a where
statement if a given input value is present on the incoming request.
You may accomplish this using the when method:
$role = $request->input('role');
$users = DB::table('users')
->when($role, function ($query, $role) {
return $query->where('role_id', $role);
})
->get();
The when method only executes the given Closure when the first
parameter is true. If the first parameter is false, the Closure will
not be executed.
Something like this:
$something = Something::where('height', '>=', $request->heightMin)
->where('height', '<=', $request->heightMax)
->when($request->age, function ($query, $age) {
// your query here
$query->where('age', $age);
})
->get();

Answer 2

Use "Between":
MySQL Raw Query WHERE Statement Example:
WHERE height BETWEEN :heightMin AND :heightMax
Looks like laravel, if it is take a look at:
https://laravel.com/docs/8.x/queries#additional-where-clauses
$something = Something::whereBetween('height', [1, 100])
->get();
However, if its not laravel, go in your IDE .. if you type just "where" if you find something like whereBetween in your autocompletion
If there is a problem with null values in the database you can do a (and)Where height IS NOT NULL .. You can also split your query like
$something = Something::where('height, '>=', $request->heightMin);
if($request->heightMax !== null){
something = something->where('height, '<=', $request->heightMax)
}
something->get();

Answer 3

if you want to remove age field and order you have to add where to your query like this:
$something = Something::where('height, '>=', $request->heightMin)
->where('height, '<=', $request->heightMax)
->where('age, '!=', null)
->get();
but if you want to have empty age field at the end of your query result and order just others that have value you should better do something like this:
$something = Something::where('height, '>=', $request->heightMin)
->where('height, '<=', $request->heightMax)
->orderBy(Illuminate\Support\Facades\DB::raw('ISNULL(`age`), `age`'), 'ASC')
->get();