what is write() function in openerp framework?

Question

I am beginner to openerp framwork I want to know how to use write() and create() methods and what is its purpose?. I already read the docs from openerp but still I am not getting it.

Answer 1

create(cr, uid, values, context=None)

Creates new record. This method is invoked every time click on the 'New' button and the you save trough the 'Save' button.

The parameters cr and uid are well known - the database cursor object and the ID of the user executing the action.

values is a dictionary containing the values to store in the new record. The dictionary elements are in the form {'field_name': 'field_value',}.

Let say you have a Student(osv.osv) model with name, fac_id and fac_no fields. You can create a new Student's record using the following call somewhere inside the Student class:

new_student_id = self.create(cr, uid, {'name': 'Joe Doe', 
                                       'fac_id': 15, 
                                       'fac_no': '161832'})

write(cr, uid, ids, values, context=None)

Similar to create() but updates existing record(s). Which records to update is defined by the ids parameter. If you want to update the fac_id field of students with ids 166 and 299 you can do it in the following way:

self.write(cr, uid, [166, 299], {'fac_id': 21})

Answer 2

Create: when ever user saves record in the OpenERP for particular model, that time the create method is being called by the ORM.

Write: once the record is being created and then if the user modify & save the record that time the write method is being called.

This is the basic difference of create and write method.

Download the OpenERP Developer Memento, It will help you a lot!