John Davidson

id	name
1	Category A
2	Category B
3	Category C
4	Category D

---

My Answer:
2. roles




id
name




1
Admin


2
Moderator


3
User



3. users




id
name
role_id




1
John
3


2
Jane
2


3
Doe
3



4. mainchallengecategory_user




id
mainchallengecategory_id
user_id
role_id




1
1
1
3


2
2
1
3


3
3
2
2


4
4
3
3


To select the mainchallengecategories with field role_id on the table that holds the relationship that is equal to 3, you can use the following code in your controller:

php
$mainchallengecategories = MainChallengeCategory::whereHas('users', function($query) {
$query->where('role_id', 3);
})->get();


This code uses the `whereHas` method to filter the `MainChallengeCategory` model based on the relationship with the `users` table where the `role_id` is equal to 3. This will only return the mainchallengecategories that are associated with users who have a role_id of 3.

Make sure to adjust the model and relationship names according to your actual code structure.