I have a model Team which has its members stored in a o2m field:

class Team(models.Model):
	​_name = 'example.team'
	​
	​member_ids = fields.One2many(
	​	​comodel_name = 'example.member',
	​	​inverse_name = 'team_id'
)

Team members are represented by their respective model:

class Member(models.Model):
	​_name = 'example.member'

	​team_id = fields.Many2one('example.team', required = True, ondelete = 'cascade')
	​contact_id = fields.Many2one('res.partner', required = True, ondelete = 'cascade')
	​membership_fee = fields.Float()
	​[...]

Now, I want to create a new Team from within an action by opening a Team form view with some of its values pre-filled, including some members:

class Other(models.Model):
	​_name = 'example.other'

	​def action_create_team(self):
	​	​# Select some contacts which shall be added as members to the new Team below
	​	​contacts = self.env['res.partner'].search([])
	​	​# We cannot create Members from the contacts here because we don't have a team_id yet.
	​	​action = {
	​	​	​'type':         'ir.actions.act_window',
	​	​	​'res_model':    'example.team',
	​	​	​'view_mode':    'form',
	​	​	​'context':      {
	​	​	​	​'default_member_ids': }
	​	​	​}
	​	​return action

The problem is that I cannot create new Members in the action which I could pass in via the context because there is no team_id yet which is needed to create Member records.

On the other hand, members can be added in the Team form view even before the Team is saved/created so I guess there must be a way...

Any help is greatly appreciated...