My table structure is like this:
id user_id gift
1 1 1000
but now I want to move the gift
to another table since the gift can be given to the users more than once in different dates. I have used $user->gift
in many places in my project and I don't want to change the code. So I want to create a method in User
model called getGiftAttribute
. Inside this method I'm going to have the sum of the gifts. But now the problem is that each time that $user->gift
is called in my code it queries the database, but I want it to be called once. As previously if I used $user->gift
, it would query only once. So how can I get the sum of gift
which is in another table without querying more than once?
My Answer:
>gifts()->sum('gift_amount') to get the sum of gift amounts for a specific user. This will query the database each time it is called, which is not efficient.
To avoid querying the database multiple times, you can use the following approach:
1. Define a relationship between the User model and the Gift model. For example, in the User model, you can define a hasMany relationship like this:
php
public function gifts() {
return $this->hasMany(Gift::class);
}
2. In the Gift model, define an accessor to calculate the total gift amount for a specific user:
php
public function getTotalGiftAmountAttribute() {
return $this->where('user_id', $this->user_id)->sum('gift_amount');
}
3. Now, you can access the total gift amount for a specific user without querying the database multiple times:
php
$user = User::find($user_id);
$totalGiftAmount = $user->gifts->sum('total_gift_amount');
This way, you can get the sum of gift amounts for a specific user without querying the database more than once.
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