@r1tsu/payload/dist/utilities/initTransaction.js

/**
 * Starts a new transaction using the db adapter with a random id and then assigns it to the req.transaction
 * @returns true if beginning a transaction and false when req already has a transaction to use
 */ export async function initTransaction(req) {
    const { payload, transactionID, transactionIDPromise } = req;
    if (transactionID) {
        // we already have a transaction, we're not in charge of committing it
        return false;
    }
    if (transactionIDPromise) {
        // wait for whoever else is already creating the transaction
        await transactionIDPromise;
        return false;
    }
    if (typeof payload.db.beginTransaction === 'function') {
        // create a new transaction
        req.transactionIDPromise = payload.db.beginTransaction().then((transactionID)=>{
            if (transactionID) {
                req.transactionID = transactionID;
            }
            delete req.transactionIDPromise;
        });
        await req.transactionIDPromise;
        return !!req.transactionID;
    }
    return false;
}

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