Examples & Scaffolds¶

Starting a project can be a bit tricky mostly because some decisions need to be made regarding maintenance and structure of a project. Usually is something like:

How should you structure the folders.
Where should I place X files.
Where should the settings be.

And some others.

Bear in mind this is simply one example how to structure and does not constitute any opinionated option. You are free to ignore this section and do it in your own way.

Esmerald scaffold¶

In the past, Esmerald had the scaffold a good starting point but that was before the directives were introduced.

It is strongly advised to use them if you want to create a nice structured project containing generated files out of the box as well as, if you want, also deployment.

You can read more about directives and how to use them in the corresponding section.

How to quickly use them¶

Imagine you want a project containing also deployment files for a project called my_project.

Generate the application¶

$ esmerald createproject my_project --with-deployment

Generate an esmerald "app"¶

$ cd my_project/my_project/apps
$ esmerald createapp welcome

Add your welcome handler¶

Add the first welcome handler (endpoint) by changing the controllers.py inside welcome/v1/controllers.py.

Edit that file and add the following.

from esmerald import JSONResponse, get


@get("/welcome")
async def welcome() -> JSONResponse:
    return JSONResponse({"message": "Welcome to Esmerald!"})

Update the "app" urls¶

You can do this directly in the urls.py generated in the root of the project as well but we will be adding first in the app to give a complete example.

Edit the welcome/v1/urls.py and add the following:

from esmerald import Gateway

from .controllers import welcome

route_patterns = [
    Gateway(handler=welcome, name="welcome"),
]

Update the root urls¶

Now its time to update the generated urls.py from the root.

Edit the my_project/urls.py and add the following.

from esmerald import Include

route_patterns = [Include(namespace="welcome.v1.urls")]

You are now ready to start the application. Since the files were generated, you can run inside the my_project root the make run.

Check the documentation¶

You can now check http://localhost:8000/docs/swager and you can test your brand new API.

Final structure¶

You should now have a project similar to the following structure, containing also deployment files.

.
├── deployment
│   ├── docker
│   │   └── Dockerfile
│   ├── gunicorn
│   │   └── gunicorn_conf.py
│   ├── nginx
│   │   ├── nginx.conf
│   │   └── nginx.json-logging.conf
│   └── supervisor
│       └── supervisord.conf
├── Makefile
├── my_project
│   ├── apps
│   │   ├── __init__.py
│   │   └── welcome
│   │       ├── directives
│   │       │   ├── __init__.py
│   │       │   └── operations
│   │       │       └── __init__.py
│   │       ├── __init__.py
│   │       ├── tests.py
│   │       └── v1
│   │           ├── controllers.py
│   │           ├── __init__.py
│   │           ├── schemas.py
│   │           └── urls.py
│   ├── configs
│   │   ├── development
│   │   │   ├── __init__.py
│   │   │   └── settings.py
│   │   ├── __init__.py
│   │   ├── settings.py
│   │   └── testing
│   │       ├── __init__.py
│   │       └── settings.py
│   ├── __init__.py
│   ├── main.py
│   ├── serve.py
│   ├── tests
│   │   ├── conftest.py
│   │   ├── __init__.py
│   │   └── test_app.py
│   └── urls.py
└── requirements
    ├── base.txt
    ├── development.txt
    └── testing.txt