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we have situation where some old guy just declared binary without attachment=True and now we added it 

so for old data which entered before enabling of attachment attribute exist in database

how we can migrate those binary (stored in DB) to the attachment(file store)?

little hint would be appreciated and please suggest if community have any module/script for that. 

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Best Answer

Probably this solution is too late for you. However this is my solution:

DON'T ADD attachment=True to the model field. Here is steps you should do:

1) Copy all the files somewhere in order to save them. You could use XML-RPC script. If you don't have any files and you've got empty database you could skip this step.

  • rpc_api.py (my RPC scripts helper api). You will need this file in step 5.

import xmlrpc.client as xmlrpclib

class API():
def __init__(self, srv, db, user, pwd):
common = xmlrpclib.ServerProxy(
'%s/xmlrpc/2/common' % srv)
self.api = xmlrpclib.ServerProxy(
'%s/xmlrpc/2/object' % srv)
self.uid = common.authenticate(db, user, pwd, {})
self.pwd = pwd
self.db = db
self.model = ''

def set_model(self, model):
self.model = model

def execute(self, method, arg_list, kwarg_dict=None):
return self.api.execute_kw(
self.db, self.uid, self.pwd, self.model,
method, arg_list, kwarg_dict or {})

def get(self, id=None, field='id'):
domain = [('id', '=', id), (field, '!=', False)] if id else []
return self.execute('search_read', [domain, [field]])

def get_fields(self, id=None, fields=[]):
domain = [('id', '=', id)] if id else []
return self.execute('search_read', [domain, fields])

def set(self, id=None, vals={}):
if vals:
self.execute('write', [[id], vals])
return id
  • Attachments script

from rpc_api import API
import os.path

if __name__ == '__main__':
srv, db = 'http://domainname.com', 'database_name'
user, pwd = 'admin', 'admin'
api = API(srv, db, user, pwd)

# Defining models
models = {
'model_name': [
'field1',
'field2'
]
}

for model, fields in models.items():
# Setting model
api.set_model(model)
# Fetching all
ids = [id.get('id') for id in api.get()]

for id in ids:
for field in fields:
filename = "attachments/%s-%s-%s" % (model, id, field)
# Check if file exists
if not os.path.exists(filename):
for val in api.get(id, field):
base64 = val.get(field)
if base64:
# Writing to file
with open(filename, 'w') as infile:
infile.write(base64)
print("%s CREATED" % filename)
else:
print("model: \"%s\" id: %s column: \"%s\" is EMPTY" % (model, id, field))
else:
print("%s ALREADY EXISTS" % filename)

2) Add attachment=True to your field in model.

fieldname = fields.Binary(string="Field 1", attachment=True)

3) Update/Upgrade your application and Restart server

odoo-bin --database=database_name --update=module_name

4) Delete field from the database. Execute following SQL script:

ALTER database DROP COLUMN fieldname;

P.S. if you don't delete column, it will save all files both in filestore and in database

5) Upload saved files (attachments) with following RPC script.

from rpc_api import API
import os

if __name__ == '__main__':
srv, db = 'http://domainname.com', 'database_name'
user, pwd = 'admin', 'admin'
api = API(srv, db, user, pwd)

path = 'attachments/'
for filename in os.listdir(path):
info = filename.split('-')
if len(info) != 3:
# Cannot be parsed
print("Filename: %s cannot be parsed" % filename)
continue

model, id, field = filename.split('-')
api.set_model(model)
base64 = open(path + filename).read()
# Setting value to record
api.set(int(id), {field: base64})
print("model: %s id: %s field: %s OK" % (model, id, field))

I don't know exactly is there any other proper ways to do that. This will work. Be careful with your database

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great tuto, thanks a lot, it help =)