Chapter 3: A New Application¶
The purpose of this chapter is to lay the foundation for the creation of a completely new Flectra module. We will start from scratch with the minimum needed to have our module recognized by Flectra. In the upcoming chapters, we will progressively add features to build a realistic business case.
The Real Estate Advertisement module¶
Our new module will cover a business area which is very specific and therefore not included in the standard set of modules: real estate. It is worth noting that before developing a new module, it is good practice to verify that Flectra doesn’t already provide a way to answer the specific business case.
Here is an overview of the main list view containing some advertisements:
The top area of the form view summarizes important information for the property, such as the name, the property type, the postcode and so on. The first tab contains information describing the property: bedrooms, living area, garage, garden…
The second tab lists the offers for the property. We can see here that potential buyers can make offers above or below the expected selling price. It is up to the seller to accept an offer.
Here is a quick video showing the workflow of the module.
Hopefully, this video will be recorded soon :-)
Prepare the addon directory¶
Reference: the documentation related to this topic can be found in manifest.
Goal: the goal of this section is to have Flectra recognize our new module, which will be an empty shell for now. It will be listed in the Apps:
The first step of module creation is to create a new directory. To ease the development, we
suggest you first create the directory
/home/$USER/src/custom. In this directory we add
estate, which is our module.
A module must contain at least 2 files: the
__manifest__.py file and a
__init__.py file can remain empty for now and we’ll come back to it in the next chapter.
On the other hand, the
__manifest__.py file must describe our module and cannot remain empty.
Its only required field is the
name, but it usually contains much more information.
Take a look at the
as an example. In addition to providing the description of the module (
website…), it lists its dependencies (
depends). A dependency means that the
Flectra framework will ensure that these modules are installed before our module is installed. Moreover, if
one of these dependencies is uninstalled, then our module and any other that depends on it will also
be uninstalled. Think about your favorite Linux distribution package manager
pacman…): Flectra works in the same way.
Create the required addon files.
Create the following folders and files:
__manifest__.py file should only define the name and the dependencies of our modules.
Two framework modules are necessary:
Restart the Flectra server and add the
custom folder to the
$ ./flectra-bin --addons-path=../custom,../professional/,addons
Go to Apps, click on Update Apps List, search for
estate and… tadaaa, your module appears!
Did it not appear? Maybe try removing the default ‘Apps’ filter ;-)
Make your module an ‘App’.
Add the appropriate key to your
__manifest__.py so that the module appears when the ‘Apps’
filter is on.
You can even install the module! But obviously it’s an empty shell, so no menu will appear.
All good? If yes, then let’s create our first model!