What about Geospatial fields and queries?

[mosynaq]

Hi. I like this project but I need Geospatial Fields like Point and Polygon and Geospatial queries which can be found in Mongoengine. Is there any way or plan for these?

[mosynaq]

Hello? Anyone here?

[lafrech]

I'm currently focusing on shipping umongo 3.

There's been prior discussion about this a while (4 years) ago in #248.

It might be worth checking the state of geojeon and pymongo to see if those considerations still apply. Is geojson still the way to go? Does pymongo provide some sort of geojson support? What about the other drivers? What are the exact supported features in latest MongoDB versions?

I've been using a custom Point in my app:

from marshmallow import ValidationError, fields as ma_fields

import geojson

from umongo.i18n import gettext as _

class Point(ma_fields.Field):

    def _serialize(self, value, attr, obj):
        if value is None:
            return None
        # Item access works for both Mongo world and OO world
        return value['coordinates']

    def _deserialize(self, value, attr, data, **kwargs):
        if isinstance(value, geojson.Point):
            return value
        try:
            # TODO: Add unit tests. Seriously.
            # Should work for both Mongo world and OO world
            return geojson.Point(value)
        except ValueError:
            raise ValidationError(_('Invalid Point.'))

import geojson

from umongo import fields as u_fields

from . import marshmallow_bonus as ma_bonus_fields

class PointField(u_fields.BaseField, ma_bonus_fields.Point):

    def _deserialize_from_mongo(self, value):
        return geojson.GeoJSON.to_instance(value)