OneToMany mapping from Table to Foreign Table [Symfony 2 / Doctrine] - symfony

Question

From what I've gathered, Symfony 2 / Doctrine uses the database definitions (foreign key constraints in my case) to map relations between entities. I have two tables in particular that I want to be able to relate from both sides, but I do not want to create redundant foreign keys in each table. In this case, I have an Account table, and a Transaction table.
Account Table
CREATE TABLE "account" (
"account_id" BIGSERIAL NOT NULL,
"name" VARCHAR (100) NOT NULL,
"date_created" TIMESTAMP (6) WITH TIME ZONE NOT NULL,
"date_modified" TIMESTAMP (6) WITH TIME ZONE,
CONSTRAINT "pk-account-account_id"
PRIMARY KEY ("account_id"),
);
Transaction Table
CREATE TABLE "transaction" (
"transaction_id" BIGSERIAL NOT NULL,
"account_id" BIGINT NOT NULL,
"amount" MONEY NOT NULL,
"date_created" TIMESTAMP (6) WITH TIME ZONE NOT NULL,
"date_modified" TIMESTAMP (6) WITH TIME ZONE,
CONSTRAINT "pk-transaction-transaction_id"
PRIMARY KEY ("transaction_id"),
CONSTRAINT "fk-transaction-account_id-account-account_id"
FOREIGN KEY ("account_id")
REFERENCES "account" ("account_id")
ON DELETE RESTRICT
ON UPDATE CASCADE,
);
When I generate the entities using php bin/console doctrine:generate:entities I see that the transaction entity has an $account property, but my account entity does not have a $transaction entity. I assume this is because I do not define a foreign key constraint in my account table.
In my code, I create my account object by the following:
$accounts = $this->getDoctrine()
->getRepository('BalancesBundle:Account')
->findAll();
I then would want to iterate over the array to get the total balance for each account. In the long-term, I'd like to create a helper method inside my account entity that would call getTransactions() to add up all of the transactions into one sum total.
Is this possible? I feel like I'm missing something, and that my only recourse would be to do this from within the transaction entity. I would like to avoid doing this from the transaction entity if possible.

Answer 1

From what I get, you can't get transaction entities of the account entity. The weird thing is that you don't have "transactions" property inside your ccount entity, am I right ? Seems like a bad mapping.
Take a look at Doctrine documentation, you have to define your "transcations" property inside your "account" entity and map it with the OneToMany association.
Then you can use "php bin/console do:ge:entities AppBundle:Account"

Answer 2

If your entities are setup correctly then you should be able to access the transactions from the account.
foreach ($accounts as $account) {
$transactions = $account->getTransactions();
$transaction_total = 0;
foreach($transactions as $transaction) {
$transaction_total += $transaction->getAmount();
}
echo 'Transactions Total: '.$transaction_total;
}