[Python] How to compute on load?

I have a model like this:

# Calculated Fields
request = fields.Many2one('job.request', string='Request', required=True)
e_name = fields.Char('Nama Asset', store=False, compute="_compute_initial")

@api.depends('request')
def _compute_initial(self):
for record in self:
r = record.request
record.e_name = r.equipment_id.name


And I need to assign a value to e_name, taken from its parent, for display purposes only, as equipment from "job.request". The problem is that _compute_initial doesn't get executed, even though I've put the e_name field on the form, the value is empty.

So, how to execute _compute_initial to fill in the e_name field?

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