liste_etudiant = []
for record in self:
if record.x_studio_anne_academique_:
etudiant = self.env['x_apprenant_par_annee'].search([('x_studio_many2one_field_S5CZy.id','=',record.x_studio_anne_academique_.id)])
if etudiant:
for line in etudiant:

liste_etudiant.append(line)

---------------------------------------------------------------------------------------------------

Now my data is in liste_etudiant.

The issue, is how put this data in many2manyfield ?

when i do this :

for f in liste_etudiant:
record.write({' x_studio_many2many_field_knpV7' : f})

I only get one data display in many2many field.

Thanks !