coltrane is designed to be used without a database, however, sometimes it’s useful to have access to data inside your templates.

JSON data directory

Create a directory named data in your project folder (if it doesn’t already exist) and add JSON files. The name of the file (without the json extension) will be used as the key in the context data.

If there are JSON files in sub-directories, the directory names will be included in the dictionary hierarchy.


    {"name": "Douglas Adams"}


    {"title": "The Hitchhiker's Guide to the Galaxy"}


# index

{{ }} is the author.

{{ }} is the book title.

Generated index.html

<h1 id="index">index</h1>

<p>Douglas Adams is the author.</p>

<p>The Hitchhiker's Guide to the Galaxy is the book title.</p>

JSON5 support

JSON5 data files are supported if the json5 extra is installed and the COLTRANE_JSON5_DATA environment setting is set to True.