For example i have 2 models. 

One2many is relation goes to another model. in create method how to get the id of record.

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example

record_set_partner = self.env['res.partner'].browse(vals['partner_id'])

this statement get the id of res.partner.How to get the id based on one2many field.

i tried like this 

internal_activities_record = self.env['lmc.phone'].browse(vals['tasks_ids'])

But get an error unhaustable type 'list'

Notes

please help me how to solve this issue.Thanks in advance