We are proud to announce the 4.0 release of Tryton.
This is the first release of Tryton that adds support for Python 3. The server and most of the modules support it. The missing modules are mainly the ones using the WebDAV and LDAP. The client will be ported once GTK-3 support is added. The release sees also a large refactoring of the protocol stack which was previously based on the SimpleHTTPServer of Python. Now it uses a WSGI application running on the Werkzeug server by default. Any WSGI server can be used to run Tryton, this removes the design constraint of single threaded process and opens the way for using workers. All modules have been reviewed to enforce the naming convention about the document identification. The name "code" is used for all referential documents like parties, product. The name "number" is used for the internal identification of all operational documents like sales, purchases, invoices etc. And finally, the name "reference" is used for identifications from external systems like the sale order number of the supplier of your purchase. Two new languages are now available on default installation the Lao and the Simplified Chinese.
As Richard Stallman reminded to us, the migration from previous series is fully supported.
Major changes for the user
The new note functionality handles the management system for general textual notes on any arbitrary model in Tryton. On click it opens a notes dialog, where the user can maintain notes. The read state of every note is managed per user. Like the attachments, the icon in the tool-bar visualizes when there are notes on a model.
![Tryton note]()
![Sao note]()
The CSV import and export has been highly reworked for a better experience. The import dialog now supports drag and drop to order the selected columns like the CSV export wizard. Both wizards are able to use any of the encodings available in Python. It is now possible to configure the CSV parameters for the export result.
![Export CSV]()
The charts provided by the graph view have been improved. Now they use softer colors, thinner lines and smaller arcs. On the background, dash style is used instead normal line for axis representation. A smart transparency value is applied for filling lines to always show through it.
A new button in the scheduler allows running a job once, useful to run jobs on demand or to test new settings.
Accounting
The report design of the General Ledger, Trial Balance and Aged Balance has been re-worked. They are now based on the new dynamic views. This provides a performance burst and allows to filter the records more precisely. In addition to the previous printable output, they also gain the CSV export which is useful to perform specific operations in a spreadsheet application.
![General Ledger]()
A date field is added to the Aged Balance, to modify the date on which the calculations are based. With this feature, it is possible to generate reports based on a past date as if it would have been generated by ignoring reconciliation that happened after that date.
The functionality of Third Party Balance is merged into the Aged Balance. We found that the Third Party Balance computed the same data as the Aged Balance with the type Customers and Suppliers.
Party
- The Name field on party is no longer required for input. This solves a long standing request to be able to maintain parties where the name is not known on creation.
Product
A configuration form is added to the product module with these options:
- The default value for Use Category fields.
- The default value for the Cost Price Method.
It was not always easy to explain the design of products with the templates, especially when it was not really relevant for the current business. So we have redesigned both views to be very similar and indeed they use the exact same design. The fields, that do not exist on the product, are automatically replaced by the value of the template.
![Product]()
![Variant]()
The field Category is replaced by a Categories field, to support the ability of adding many categories to one product. This is very useful for example to create multi-axis categories for web shop.
Classification
This new module defines the reference basis to create different kinds of classifications for products. It adds a generic field Classification on the product form.
Purchase
- The field Delivery Time on product supplier is replaced by Lead Time which increases the precision from days to microseconds.
- For each warehouse, it is now possible to define the location where the goods are picked in case of supplier return. If this location is not defined, the default storage will be used.
Request
The purchase request functionalities have been decoupled from stock_supply and sale_supply modules into a new separate module named purchase_request. This is to prepare future work that will use only purchase requests without the need of other stock_supply features.
- A new state Exception is added to the purchase request. This is useful to manage cancelled purchase when linked to drop shipments.
Sale
- The field Delivery Date on model Sale Line is renamed into Shipping Date to avoid any confusion.
- The field Delivery Time on product form is replaced by Lead Time which increases the precision from days to microseconds.
- The custom history management on Sale Opportunity is replaced by the general revision functionality of the client. This increases its precision and works automatically for any new fields.
Stock
- The address of the destination warehouse of the Internal Shipment is now displayed on the report.
- Now it is possible to manually do a move with the new Do button. This is useful for example to get correct accounting when you have long living productions.
- Supplier return shipments now have a supplier and a delivery address fields. Those fields will be automatically populated for shipments created from purchase.
Production
Routing
This new module defines the routings, steps and operations for productions. A routing is a list of ordered steps and each step is defined by a generic operation.
Work
This new module completes the routing module by creating the Works of a production based on its routing. A Work is linked to a Work Center which defines the cost using one of these two methods: Per Cycle or Per Hour. The cost of a work is computed using the Cycles created on it and later added to the global cost of the production.
Major changes for the developer
- The domains are now accepting a new parent_of operator which recursively returns all the records that are parents of the searched records. This is the opposite of the existing child_of operator.
- It is now possible to inherit from a view that already inherits another view from a different model.
- The new where domain operator is useful when you need to search on a xxx2Many with a full sub-domain instead of separated clauses. It has the advantage to avoid to fetch an intermediary result by using a sub-query.
- The Transaction design has been reworked to be closer to the design defined by the PEP-0249. This new design allows to support nested transactions. It also supports multiple cursors for the same transaction, reducing the memory consumption when iterating over large result sets.
- A new context model is introduced, to save the trouble of writing simple wizards for configuring reports by setting some values in the context. With this new design, the developer can define a model for which each field will define the values of the context. The form of this model will be displayed on top of the view and the view will be automatically reloaded when the context is changed.
- Now its possible to have reports in plain, XML, HTML and XHTML reports. With this change the report infrastructure can be reused for example to design email templates.
- This release adds support for the Two-Phase commit protocol which allows to coordinate distributed transactions. By default, Tryton uses a single transaction from the database back-end. But when Tryton has to communicate with other systems, it is good to use TPC to keep data integrity. The implementation follows the API of the Zope Data Manager. The data managers of the Zope community can be used within Tryton.
- Thanks to the two-phase commit protocol now mails can be sent when the transaction is committed, so if something goes wrong and the transaction is rolled back no mails are sent.
Accounting
The reconciliation process now stores the date of the reconciliation. By default, it is the highest date of the reconciled lines. This allows to filter reconciled lines based on this date, for example to generate a report with the unreconciled lines before a specific date.
The Credit Notes have been merged into the Invoices. They are now standard invoices with negative quantities. This allows to easily group both types into a single document. The numbering can still be differentiated depending on the sign of the lines.
Note: with the merge of Invoice and Credit Note, the signs of the taxes for Credit Note must be inverted manually.
Product
- Uom.round is now an instance method which makes more sense according to its signature.
Purchase
- The Purchase has received a done transition like the Sale to allow extensions to perform some action when this transition is performed.
- It is now possible to search Purchase Requests using the Purchase field.
WebDAV
WebDAV has been decoupled from trytond into a separate module which improves the modularity of the system. Indeed many setups do not use the WebDAV so it was a little bit bloated to have it into the base. Also dependencies of this module prevented to add the support of Python 3 to trytond. So, for now, the WebDAV protocol is managed by a separated process but it will probably return in the future into the main process.