Custom source for feature metadata about django-rest-framework-gis

[pglotov]

Can you use a SerializerMethodField for the data from HStore?

[lrvdijk]

I don't think so: it would be an extra field in your serializer class, which would return the following "properties" dict:

"properties": {
    "extra_field": {
        "metadata1": value1,
    }
}

And what I would like as result:

"properties": {
    "metadata1": value1
}

[pglotov]

In your GeoFeatureModelSerializer put

metadata1 = SerializerMethodField()

def get_metadata1(self, obj):
 ....
    return value1

This will make metadata1 entry and add it to properties after geo serializer is done.

[lrvdijk]

Yes but that's not what I want. I don't want the extra_field to be visible. The GeoJSON properties dict should solely be filled with data from the HStore field, not from the fields declared in the serializer.

[pglotov]

You can make a serializer field for each value you want included, and explicitly list them in Meta.fields.

[lrvdijk]

Well, that would not work with my variable metadata requirement (also the reason I'm using HStore).

[pglotov]

I see, makes sense.

[pglotov]

But still could've had this:

class MySerializer(GeoFeatureModelSerializer):

metafield = SerializerMethodField()

def get_metafield(self, obj):
    return meta_value

def to_representation(self, instance):
    res = super(MySerializer, self).to_representation(instance)
    res['properties'] = res['properties']['metafield']
    return res

# similar for to_internal_value

[nemesifier]

Left a few comments on #71

[nemesifier]

Thank you @sh4wn, I merged #71 manually in 5a82a00.

I needed to change a few bits in order to avoid losing some performance gains I managed to introduce in the latest versions, but the behaviour you introduced should be unchanged (except for the name of the method get_feature_properties which I renamed to get_properties for simplicity).

Please test 0.9.5 alpha in your app and report any feedback.

[lrvdijk]

Cool, thanks! I'll check it next week.

[nemesifier]

0.9.5 was released a few weeks ago, I'm considering this solved.