Laravel在JSON中返回模型关系

Question

When I try to return model relationships in JSON, I don't see the relationship fields. That's my query:

$customer_subscriptions = CustomerSubscription::has("customer")
                ->has("subscription")
                ->has("federationDiscipline")
                ->where("customer_id", "=", $customer_id)
                ->whereHas("subscription", function($query) use($company_id) {
                    $query->where("company_id", "=", $company_id);
                })
                ->orderBy("start_date", "asc");

        return $customer_subscriptions;

That's my result:

[0]=>
  array(14) {
    ["id"]=>
    int(2)
    ["customer_id"]=>
    int(1)
    ["subscription_id"]=>
    int(1)
    ["federation_discipline_id"]=>
    int(1)
    ["start_date"]=>
    string(10) "2017-04-01"
    ["end_date"]=>
    string(10) "2017-05-31"
    ["external_id"]=>
    NULL
    ["notes"]=>
    NULL
    ["created_user_id"]=>
    int(1)
    ["updated_user_id"]=>
    NULL
    ["deleted_user_id"]=>
    NULL
    ["created_at"]=>
    string(19) "2017-06-05 07:28:00"
    ["updated_at"]=>
    string(19) "2017-06-05 07:28:00"
    ["deleted_at"]=>
    NULL
  }

I don't see the subscription's and the customer's relationship field. The result of query should return JSON to AJAX

Answer 1

Using ->has only acts as a where condition, it doesn't load that relation in to your result set.

You want to use ->with instead.

In your case ->with('subscription','federationDiscipline')

https://laravel.com/docs/5.4/eloquent-relationships#eager-loading