Adds integration of the Jinja template language to FastAPI. This is inspired and based off fastapi-chamelon by Mike Kennedy. Check that out, if you are using chamelon.

For the moment, this is not yet on pypi and is fairly unstable, but if you wish to used it directly from here, just do the following:

pip install git+https://github.com/ageekinside/fastapi-jinja

You may want to fork this repo and then use your URL until this is more final.

This is easy to use. Just create a folder within your web app to hold the templates such as:

├── main.py
├── views.py
│
├── templates
│   ├── home
│   │   └── index.j2
│   └── shared
│       └── layout.j2

In the app startup, tell the library about the folder you wish to use:

import os
import fastapi_jinja

dev_mode = True

folder = os.path.dirname(__file__)
template_folder = os.path.join(folder, 'templates')
template_folder = os.path.abspath(template_folder)

fastapi_jinja.global_init(template_folder, auto_reload=dev_mode)

Then just decorate the FastAPI view methods (works on sync and async methods):

@router.post('/')
@fastapi_jinja.template('home/index.j2')
async def home_post(request: Request):
    form = await request.form()
    vm = PersonViewModel(**form) 

    return vm.dict() # {'first':'John', 'last':'Doe', ...}

The view method should return a dict to be passed as variables/values to the template.

If a fastapi.Response is returned, the template is skipped and the response along with status_code and other values is directly passed through. This is common for redirects and error responses not meant for this page template.