This is the documentation for older versions of Odoo (formerly OpenERP).

See the new Odoo user documentation.

See the new Odoo technical documentation.

Developing modules


Here you will find information about the organisation of the community in OpenERP project. It includes a description of the different tools used, the role of the different actors, and the different process for improvement management.

The whole organisation is managed through our launchpad projects: Our projects on launchpad are currently organised like this:

Project name




the main super-project (group) where all bugs, features and faq are managed


the project for core OpenERP modules


the OpenERP server


the web client for OpenERP 6.1 and newer versions


the native client (gtk) for OpenERP 6.1 and earlier


the web client for OpenERP 6.0 and earlier versions

Getting Sources

Please refer to How to get the latest trunk source code in the Bazaar section

If you don't know the Bazaar version control system, please read the documentation on Bazaar

Community Addons

OpenERP modules developed by the community were historically published in a shared source code branch on Launchpad, nicknamed extra-addons:

As of 2012 and the release of OpenERP 6.1, this shared branch is being phased out, due to several downsides to this organization, such as:

  • difficult to enforce access control on the modules (commit right is all or nothing)

  • difficult to enforce quality (therefore impossible to rely on it for customer projects)

  • commit history mixes all modules

  • download/checkout of the branch requires to fetch all modules at once

A better organization was discussed on the OpenERP mailing-lists, with the following goals:

  • To get rid of the big extra-addons branch

  • To join efforts on the same topic in order to avoid too many modules for a same feature

  • To become more aware of the developments that have been done by others

  • To start working with merge proposal between us

  • To improve the quality of our code

The community modules have therefore been split into separate Launchpad project and their respective branches. When possible, existing ones were reused. All listed projects provide a short description of the kind of modules you can find/merge into.

The community welcomes everyone on board to join efforts! In order to add your own modules in the appropriate project, you should use merge proposals. Depending on the volume, some time might be needed at the beginning to review everything. So thank you all in advance for your patience during this transition period.

For all of these projects, the rules we expect you to adhere to and respect are:

  • No company-related prefix or suffix in the module names (like c2c-account-something);

  • Always make merge proposal for any bugfix or improvement so that everyone can take note of it and eventually ask for a different approach;

  • Nobody merge his/her own work into the branch. Another member of the team must do it. Exceptions may be accepted if the merge proposal has been strongly approved by the rest of the team;

  • If your module doesn’t fit into any of the available projects, or you found no related team, please post a request on the framework expert mailing list so that we can create a specific one for you;

  • When at least one of your modules has been approved in the branch, you may ask to be part of the team. If you are not part of the team, you can still contribute to the project through merge proposals;

  • Use the available teams (see Community Contributor Teams section) according to their topics (it means that you always need to attribute a new project to these teams, so as to avoid having hundreds of them).

Should you have any suggestions related to the above rules, please feel free to post them on the framework expert mailing list.

Community Projects

The list of the official community projects/topics can be found under this project group:, and is summarized below.

Some of them are waiting on their owner to bring some modifications so they can fit into other projects (changing team, series,...). Should you be one of these owners, please inform the others on the mailing-list when ready. If some refuse to open the projects to the community, it is always possibel to create another project.

Misc Guidelines


Organisation of files in modules

The structure of a module should be:



Each object defined in your module must have at least one security rule defined on it to make it accessible.

Coding Guidelines

Follow Python PEP 8:


General Style

  • use the Helvetica font everywhere

  • margins (in millimeters):

    • top: 14

    • bottom: 16

    • left: between 12 and 13 to allow punching holes without punching in the text area

    • right: between 12 and 13


    the line separator between the header and the body can overlap slightly in the left and right margins: up to 9 millimeters on the left and up to 12 millimeters on the right

  • for Titles use font Helvetica-Bold with size 14.5

  • put the context on each report: example, for the report account_balance: the context is the fiscal year and periods

  • for the name of cells: use Capital Letter if the name contains more than one word (ex: Date Ordered)

  • content and name of cells should have the same indentation

  • for report, we can define two kinds of arrays:

    • array with general information, like reference, date..., use:

      • Bold-Helvetica and size=8 for cells name

      • Helvetica size="8" for content

    • array with detailed information, use:

      • Helvetica-Bold size 9 for cells names

      • Helvetica size 8 for content

Headers and footers for internal reports:
  • Internal report = all accounting reports and other that have only internal use (not sent to customers)

  • height of headers should be shorter

  • take off corporate header and footer for internal report (Use a simplified header for internal reports: Company's name, report title, printing date and page number)

  • header:

    • company's name: in the middle of each page

    • report's name: is printed centered after the header

    • printing date: not in the middle of the report, but on the left in the header

    • page number: on each page, is printed on the right. This page number should contain the current page number and the total of pages. Ex: page 3/15

  • footer:

    • to avoid wasting paper, we have taken off the footer

table line separator:
  • it's prettier if each line in a table has a light grey line as separator

  • use a grey column separator only for array containing general information

table breaking
  • a table header should at least have two data rows (no table header alone at the bottom of the page)

  • when a big table is broken, the table header is repeated on every page

how to differentiate parents and children ?
  • When you have more than one level, use these styles:

  • for the levels 1 and 2:fontSize="8.0" fontName="Helvetica-Bold"

  • from the third level, use:fontName="Helvetica" fontSize="8.0" and increase the indentation with 13 (pixels) for each level

  • underline sums when the element is a parent


Naming Convention

The name of the module are all lowercase, each word separated by underscores. Always start with the most relevant words, which are preferably names of other modules on which it depends.


  • account_invoice_layout

Information Required

Each module must contain at least:

  • name

  • description

Modules Description


Each module must contain:

  • A list of dependencies amongst others modules: ['account','sale']

  • Provide only highest requirement level, not need to set ['account','base','product','sale']

Module Content

Each module must contain demo data for every object defined in the module.

If you implemented workflows in the module, create demo data that passes most branches of your workflow. You can use the module recorder to help you build such demo data.

Default Language

The default language for every development must be U.S. English.

For menus and fields, use uppercase for all first letters, excluding conjections:

  • Chart of Accounts

Field Naming Conventions

  • many2one fields should respect this regex: '.*_id'

  • one2many fields should respect this regex: '.*_ids'

  • one2many relation table should respect this regex: '.*_rel'

  • many2many fields should respect this regex: '.*_ids'

  • use underscore to separate words

  • avoid using uppercase

  • if a field is composed of several words, start with the most important words

Model Naming Conventions

  • All objects must start with the name of the module they are defined in.

  • If an object is composed of several words, use points to separate words


  • All Tree of resources are called XXX's Structure, unless a dedicated term exist for the concept

    • Good: Location' Structure, Chart of Accounts, Categories' Structure

    • Bad: Tree of Category, Tree of Bill of Materials