I've simplified my code for the sake of this question, but basically I have this  

class Booking(models.Model):
    _name = 'ff.booking'
    boat_ride_bookings = fields.Many2many('ff.boat_ride_booking')
    foo = fields.Integer()

class BoatRideBooking(models.Model):
    _name = 'ff.boat_ride_booking'
    booking = fields.Many2many('ff.booking')
    foo = fields.Integer()

In another place (outside of both of these models) I'm trying to do create some BoatRideBooking objects on existing Booking objects and then connecting them.

This works

# booking is a referance to an existing record
brb = self.env['ff.boat_ride_booking'].create({ 'foo': 1 })
booking.boat_ride_bookings = [(4,brb.id)]

But I want to do something like this

# booking is a referance to an existing record
brb = self.env['ff.boat_ride_booking'].create({ 'foo': 1, 'booking': booking.id })

or even better

# booking is a referance to an existing record
booking.boat_ride_bookings = [(0,0,{ 'foo': 1, 'booking': booking.id }]

but that neither works. I probably don't have the right syntax and I've been looking everywhere and trying a lot.

Someone know the right syntax on how to solve this problem?

Thanks!