Fixing Odoo 13 Model Field Value Retrieval Issues

Learn how to effectively read field values from another model in `Odoo 13`. Discover how to fix common errors when retrieving data across models with our comprehensive guide and code examples.
---
This video is based on the question https://stackoverflow.com/q/64737535/ asked by the user 'nobel khaled' ( https://stackoverflow.com/u/8718134/ ) and on the answer https://stackoverflow.com/a/64749043/ provided by the user 'Daniel Reis' ( https://stackoverflow.com/u/959570/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: reading a field value from another model odoo13

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Fixing Odoo 13 Model Field Value Retrieval Issues: A Step-by-Step Guide

When developing modules in Odoo, you may encounter situations where you need to retrieve a field value from another model. In this post, we will address a common problem developers face while trying to read field values from the [stock.move] model and provide a solution to make your code work seamlessly.

The Problem

Suppose you want to create a new field called dimension in the account.move model that fetches its value from a field within the [stock.move] model. You may find that your initial approach doesn’t work as intended, and while you’re not receiving Python errors, issues do arise within your XML file's XPath tag.

Example Scenario

Here's the code snippet causing the issue within your models.py file:

[[See Video to Reveal this Text or Code Snippet]]

What's Wrong?

The issue resides in this line:

[[See Video to Reveal this Text or Code Snippet]]

Here, stock_move is assigned an empty recordset, which leads to no iterations occurring in the for loop. As a result, the code fails to retrieve the desired data.

The Solution

To resolve this issue, you need to modify the way you are fetching records from the stock.move model. Instead of just initializing stock_move, you will need to use the search() method to retrieve the records you want.

Update Your Code

Here’s the modified code:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of Changes

Use of search() Method: By using search(<DOMAIN>), you can specify the criteria needed to fetch the relevant stock.move records, ensuring that stock_move contains data to iterate over.

Define the <DOMAIN>: You need to replace <DOMAIN> with a valid search domain that matches the records you are interested in retrieving.

XML Structure Invocation

Additionally, make sure your XML structure is set correctly. Here’s your XML file demonstrating how to add a dimension field to the invoice view.

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

The issue of reading field values from another model in Odoo can be resolved by ensuring that you are properly fetching the records instead of working with an empty recordset. By using the search() method to retrieve data based on valid criteria, you can seamlessly integrate field values across models.

With the changes outlined in this guide, you should be able to define the dimension field successfully and eliminate the confusion that arises from working with empty sets. Happy coding!