Ordered Tracking for Custom fields

Any custom field in Odoo has the option to have ordered tracking turned on in Studio. Steps to do this –

1. Enable Debug (developer) mode.
2. Open Studio in the form view.
3. Click on the field in question.
4. On the left panel, scroll down and click on “More”.
5. You will find an option called “Enable Ordered Tracking”.

Enter a number other than 0 in the field. The number indicates the priority of the fields tracking. If a field has a higher number, it has a higher priority and if multiple fields are changed at the same time, the highest priority will show up on top.

Expected behavior for Base fields

Base fields, on the other hand, will not allow you to enable ordered tracking on them. If you follow the above-mentioned steps for base fields you will notice that the ordered tracking field is read-only and even if you try to bypass and make it editable, Odoo will give you an error that says that base fields cannot be edited. 

However, there is a workaround to make this possible if clients need a way to track any changes made to base many2one fields. Keep in mind that this works only for many2one or relational fields and not char fields.

​Workaround for enabling ordered tracking on base fields

Odoo does not prevent the user from enabling ordered tracking on custom fields. We can use this to our advantage to track changes made to base fields. The following steps will enable the user to create a custom field that is related to the base field, which can be tracked.

1. Open studio in the form view.
2. Drag and drop a new related field; and relate it to the base field you want to track.
3. You can name the related field whatever you want but for the sake of tracking in the chatter, I would recommend naming it the same as a base field but with a minor difference to differentiate between the two. For example, you can call it “Country1” or “Country (tracking)” or something along those lines. I recommend having the base field's name in it so that you know what is being modified when it shows up on the chatter.
4. Follow the steps above to enable ordered tracking on the new related field.
5. You can choose to make the new field hidden if you want, to avoid any confusion and prevent cluttering the form view.
6. Exit Studio.

You now have a hidden related field that will change when the base field changes and because ordered tracking is enabled, it will be displayed in the chatter. For example, if I change the Country field, the chatter will display Country1 has been changed.