Difference between write and update in odoo11

Question

What is the difference between write and update method in odoo11 because when i use write it work first time only then it not work.

Answer 1

For simple fields

• write({'attr1': 'val1', 'attr2': 'val2'})

should give you a single update statement in the database, and

• update({'attr1': 'val1', 'attr2': 'val2'})

iterates over the fields and sets each one separately giving you multiple update statements in the database.