Laravel Eloquent 相同的查询

Question

I've faced this question on the interview recently.

$a = Flight::find(1); 
$b = Flight:find(1);

How many objects will be created? How many db queries will be executed? I'll be thankful so much for any detailed explanation

Answer 1

In Either one of the code above, the query will just be 1

$a = Flight::find(1); is same as

select * from `flights` where `flights`.`id` = 1 limit 1`

Since $a & $b are 2 different variables, though they are calling the same Eloquent function, the queries are different. So the code above will result in 2 queries.

Also object created will be 2.

See here for more about Laravel Eloquent https://laravel.com/docs/8.x/eloquent