Formatting of dates and times in Flask templates using moment.js.

Overview

Flask-Moment

Build Status

This extension enhances Jinja2 templates with formatting of dates and times using moment.js.

Quick Start

Step 1: Initialize the extension:

from flask_moment import Moment
moment = Moment(app)

Step 2: In your <head> section of your base template add the following code:

<head>
    {{ moment.include_jquery() }}
    {{ moment.include_moment() }}
</head>

This extension also supports the Flask application factory pattern by allowing you to create a Moment object and then separately initialize it for an app:

    moment = Moment()

    def create_app(config):
        app = Flask(__name__)
        app.config.from_object(config)
        # initialize moment on the app within create_app()
        moment.init_app(app)

    app = create_app(prod_config)

Note that jQuery is required. If you are already including it on your own then you can remove the include_jquery() line. Secure HTTP is always used to request the external js files..

The include_jquery() and include_moment() methods take some optional arguments. If you pass a version argument to any of these two calls, then the requested version will be loaded from the default CDN. If you pass local_js, then the given local path will be used to load the library. The include_moment() argument takes a third argument no_js that when set to True will assume that the Moment JavaScript library is already loaded and will only add the JavaScript code that supports this extension.

Step 3: Render timestamps in your template. For example:

<p>The current date and time is: {{ moment().format('MMMM Do YYYY, h:mm:ss a') }}.</p>
<p>Something happened {{ moment(then).fromTime(now) }}.</p>
<p>{{ moment(then).calendar() }}.</p>

In the second and third examples template variables then and now are used. These must be instances of Python's datetime class, and must be "naive" objects. See the documentation for a discussion of naive date and time objects. As an example, now can be set as follows:

now = datetime.utcnow()

By default the timestamps will be converted from UTC to the local time in each client's machine before rendering. To disable the conversion to local time pass local=True.

Note that even though the timestamps are provided in UTC the rendered dates and times will be in the local time of the client computer, so each users will always see their local time regardless of where they are located.

Function Reference

The supported list of display functions is shown below:

  • moment(timestamp=None, local=False).format(format_string=None)
  • moment(timestamp=None, local=False).fromNow(no_suffix=False)
  • moment(timestamp=None, local=False).fromTime(another_timesatmp, no_suffix=False)
  • moment(timestamp=None, local=False).toNow(no_suffix=False)
  • moment(timestamp=None, local=False).toTime(another_timesatmp, no_suffix=False)
  • moment(timestamp=None, local=False).calendar()
  • moment(timestamp=None, local=False).valueOf()
  • moment(timestamp=None, local=False).unix()

Consult the moment.js documentation for details on these functions.

Auto-Refresh

All the display functions take an optional refresh argument that when set to True will re-render timestamps every minute. This can be useful for relative time formats such as the one returned by the fromNow() or fromTime() functions. By default refreshing is disabled.

Default Format

The format() function can be invoked without arguments, in which case a default format of ISO8601 defined by the moment.js library is used. If you want to set a different default, you can set the MOMENT_DEFAULT_FORMAT variable in the Flask configuration. Consult the moment.js format documentation for a list of accepted tokens.

Internationalization

By default dates and times are rendered in English. To change to a different language add the following line in the <head> section after the include_moment() line:

{{ moment.locale("es") }}

The above example sets the language to Spanish. Moment.js supports a large number of languages, consult the documentation for the list of languages and their two letter codes.

The extension also supports auto-detection of the client's browser language:

{{ moment.locale(auto_detect=True) }}

Custom locales can also be included as a dictionary:

{{ moment.locale(customizations={ ... }) }}

See the Moment.js locale customizations documentation for details on how to define a custom locale.

Ajax Support

It is also possible to create Flask-Moment timestamps in Python code, for cases where a template is not used. This is the syntax:

timestamp = moment.create(datetime.utcnow()).calendar()

The moment variable is the Moment instance that was created at initialization time.

A timestamp created in this way is an HTML string that can be returned as part of a response. For example, here is how a timestamp can be returned in a JSON object:

return jsonify({ 'timestamp': moment.create(datetime.utcnow()).format('L') })

The Ajax callback in the browser needs to call flask_moment_render_all() each time an element containing a timestamp is added to the DOM. The included application demonstrates how this is done.

Subresource Integrity(SRI)

SRI is a security feature that enables browsers to verify that resources they fetch are not maliciously manipulated. To do so a cryptographic hash is provided that proves integrity.

SRI is enabled by default. If you wish to use another version or want to host your own javascript, a separate hash can be provided. Just add sri=<YOUR-HASH> when calling either moment.include_moment() or moment.include_jquery(). If no sri hash is provided and you choose to use a non default version of javascript, no sri hash will be added.

You can always choose to disable sri. To do so just set sri=False.

Development

Currently the tests are written using pytest.

pip install pytest

To run the tests from the root directory use: py.test.

Reports on coverage with missing line numbers can be generated using pytest-cov:

pip install pytest-cov

And then running: py-test --cov-report term-missing --cov=flask_moment

Owner
Miguel Grinberg
Miguel Grinberg
A kedro-plugin to serve Kedro Pipelines as API

General informations Software repository Latest release Total downloads Pypi Code health Branch Tests Coverage Links Documentation Deployment Activity

Yolan Honoré-Rougé 12 Jul 15, 2022
🐍Pywork is a Yeoman generator to scaffold a Bare-bone Python Application

Pywork python app yeoman generator Yeoman | Npm Pywork | Home PyWork is a Yeoman generator for a basic python-worker project that makes use of Pipenv,

Vu Tran 10 Dec 16, 2022
Regex Converter for Flask URL Routes

Flask-Reggie Enable Regex Routes within Flask Installation pip install flask-reggie Configuration To enable regex routes within your application from

Rhys Elsmore 48 Mar 07, 2022
FastAPI Project Template

The base to start an openapi project featuring: SQLModel, Typer, FastAPI, JWT Token Auth, Interactive Shell, Management Commands.

A.Freud 4 Dec 05, 2022
SQLAlchemy Admin for Starlette/FastAPI

SQLAlchemy Admin for Starlette/FastAPI SQLAdmin is a flexible Admin interface for SQLAlchemy models. Main features include: SQLAlchemy sync/async engi

Amin Alaee 683 Jan 03, 2023
fastapi-mqtt is extension for MQTT protocol

fastapi-mqtt MQTT is a lightweight publish/subscribe messaging protocol designed for M2M (machine to machine) telemetry in low bandwidth environments.

Sabuhi 144 Dec 28, 2022
A server hosts a FastAPI application and multiple clients can be connected to it via SocketIO.

FastAPI_and_SocketIO A server hosts a FastAPI application and multiple clients can be connected to it via SocketIO. Executing server.py sets up the se

Ankit Rana 2 Mar 04, 2022
🚀 Cookiecutter Template for FastAPI + React Projects. Using PostgreSQL, SQLAlchemy, and Docker

FastAPI + React · A cookiecutter template for bootstrapping a FastAPI and React project using a modern stack. Features FastAPI (Python 3.8) JWT authen

Gabriel Abud 1.4k Jan 02, 2023
A fast and durable Pub/Sub channel over Websockets. FastAPI + WebSockets + PubSub == ⚡ 💪 ❤️

⚡ 🗞️ FastAPI Websocket Pub/Sub A fast and durable Pub/Sub channel over Websockets. The easiest way to create a live publish / subscribe multi-cast ov

8 Dec 06, 2022
Lightning FastAPI

Lightning FastAPI Lightning FastAPI framework, provides boiler plates for FastAPI based on Django Framework Explaination / | │ manage.py │ README.

Rajesh Joshi 1 Oct 15, 2021
Prometheus exporter for several chia node statistics

prometheus-chia-exporter Prometheus exporter for several chia node statistics It's assumed that the full node, the harvester and the wallet run on the

30 Sep 19, 2022
Starlette middleware for Prerender

Prerender Python Starlette Starlette middleware for Prerender Documentation: https://BeeMyDesk.github.io/prerender-python-starlette/ Source Code: http

BeeMyDesk 14 May 02, 2021
✨️🐍 SPARQL endpoint built with RDFLib to serve machine learning models, or any other logic implemented in Python

✨ SPARQL endpoint for RDFLib rdflib-endpoint is a SPARQL endpoint based on a RDFLib Graph to easily serve machine learning models, or any other logic

Vincent Emonet 27 Dec 19, 2022
A rate limiter for Starlette and FastAPI

SlowApi A rate limiting library for Starlette and FastAPI adapted from flask-limiter. Note: this is alpha quality code still, the API may change, and

Laurent Savaete 562 Jan 01, 2023
cookiecutter template for web API with python

Python project template for Web API with cookiecutter What's this This provides the project template including minimum test/lint/typechecking package

Hitoshi Manabe 4 Jan 28, 2021
A FastAPI WebSocket application that makes use of ncellapp package by @hemantapkh

ncellFastAPI author: @awebisam Used FastAPI to create WS application. Ncellapp module by @hemantapkh NOTE: Not following best practices and, needs ref

Aashish Bhandari 7 Oct 01, 2021
Restful Api developed with Flask using Prometheus and Grafana for monitoring and containerization with Docker :rocket:

Hephaestus 🚀 In Greek mythology, Hephaestus was either the son of Zeus and Hera or he was Hera's parthenogenous child. ... As a smithing god, Hephaes

Yasser Tahiri 16 Oct 07, 2022
Code for my FastAPI tutorial

FastAPI tutorial Code for my video tutorial FastAPI tutorial What is FastAPI? FastAPI is a high-performant REST API framework for Python. It's built o

José Haro Peralta 9 Nov 15, 2022
Practice-python is a simple Fast api project for dealing with modern rest api technologies.

Practice Python Practice-python is a simple Fast api project for dealing with modern rest api technologies. Deployment with docker Go to the project r

0 Sep 19, 2022
MQTT FastAPI Wrapper With Python

mqtt-fastapi-wrapper Quick start Create mosquitto.conf with the following content: ➜ /tmp cat mosquitto.conf persistence false allow_anonymous true

Vitalii Kulanov 3 May 09, 2022