Laravel 5.3 Eloquent transactions and foreign key restrictions

Question

Am working on bigger project where we have multiple schemas in one Postgres DB. We have created foreign keys between schemas. Here is an example > We have company schema and user schema. Company schema has company_users table which have foreign key restriction on user.users table

CREATE TABLE company.company_user
(
  id serial NOT NULL,
  company_id integer NOT NULL,
  user_id integer NOT NULL,
  created_at timestamp(0) without time zone,
  updated_at timestamp(0) without time zone,
  deleted_at timestamp(0) without time zone,
  CONSTRAINT company_user_pkey PRIMARY KEY (id),
  CONSTRAINT company_user_company_id_foreign FOREIGN KEY (company_id)
      REFERENCES company.companies (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION,
  CONSTRAINT company_user_user_id_foreign FOREIGN KEY (user_id)
      REFERENCES "user".users (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION
)

Following queries run in Postgres without issue

BEGIN;
insert into "db"."user"."users" (id,"surname", "firstname", "email", "position", "language_id", "is_super_admin", "updated_at", "created_at") values (156,'Mueller', 'Julianne', 'julianne.mueller1@example.org', 'Nuclear Power Reactor Operator', 41, false, '2017-01-13 12:35:10', '2017-01-13 12:35:10') returning "id";
insert into "db"."company"."company_user" ("company_id", "user_id", "updated_at", "created_at") values (4445, 156, '2017-01-13 12:35:10', '2017-01-13 12:35:10') returning "id";
COMMIT;

However if i perform same queries via Eloquent in Laravel

\DB::beginTransaction();
$user = new User(["surname" => 'Mueller',
                  "firstname" => 'Julianne',
                  "email" => 'julianne.mueller1@example.org',
                  "position" => 'Nuclear Power Reactor Operator',
                  "language_id" => 41,
                  "is_super_admin" => false]
);
if (!$user->save()) {
    \DB::rollBack();
    return false;
}
\Log::error($user->id);
$company_user = new CompanyUser([
    "company_id" => 4445,
    "user_id" => $user->id
]);
if (!$company_user->save()) {
    \DB::rollBack();
    return false;
}
\DB::commit();

is throwing folloing error (it seems that it cannot find id of user in the table)

PDOException: SQLSTATE[23503]: Foreign key violation: 7 ERROR: insert or update on table "company_user" violates foreign key constraint "company_user_user_id_foreign"

Would anyone can say why this is not working? \Log::error($user->id) is printing id of inserted user. I tried to print out queries from Laravel with DB listener, all queries are executed in correct order, but am still getting this error.

Answer 1

Make sure CompanyUser has $fillable:

$fillable = ['user_id', 'company_id'];

Also, make sure there is a user with this ID is already in users table. Maybe you'll need to get rid of transaction.

Answer 2

Ok so we found a solution. It seems that we need to start transaction for each of schemas separately + each foreign key that are referencing different schema than their own should be created as deferred.