Sanicargs

Parses query parameters and json body parameters for Sanic using type annotations.

Survey

Please fill out this survey if you are using Sanicargs, we are gathering feedback :-)

Install

Install with pip

$ pip install sanicargs

Usage

Use the parse_parameters decorator to parse query parameters (GET) or body parameters (POST) and type cast them together with path params in Sanic's routes or blueprints like in this example below:

import datetime
from sanic import Sanic, response
from sanicargs import parse_parameters

app = Sanic("test_sanic_app")

@app.route("/me/<id>/birthdate", methods=['GET'])
@parse_parameters
async def test_datetime(req, id: str, birthdate: datetime.datetime):
    return response.json({
        'id': id, 
        'birthdate': birthdate.isoformat()
    })

if __name__ == "__main__":
  app.run(host="0.0.0.0", port=8080, access_log=False, debug=False)

Test it running with

$ curl 'http://0.0.0.0:8080/me/123/birthdate?birthdate=2017-10-30'

Query parameters

• str : ex: ?message=hello world
• int : ex: ?age=100
• bool : ex: ?missing=false
• datetime.datetime : ex: ?currentdate=2017-10-30T10:10:30 or 2017-10-30
• datetime.date : ex: ?birthdate=2017-10-30
• List[str] : ex: ?words=you,me,them,we

JSON body parameters

{ "message": "hello word", "age": 100, "missing": false, "currentDate": "2017-10-30", "currentDateTime": "2017-10-30T10:10:30", "words": ["you", "me", "them", "we"] }

Note about datetimes

Dates and datetimes are parsed without timezone information giving you a "naive datetime" object. See the note on datetime.timestamp() about handling timezones if you require epoch format timestamps.

Important notice about decorators

The sequence of decorators is, as usual, important in Python.

You need to apply the parse_parameters decorator as the first one executed which means closest to the def.

request is mandatory!

You should always have request as the first argument in your function in order to use parse_parameters.

Note that request arg can be renamed and even type-annotated as long as it is the first arg.