Allow custom primary key

[mahenzon]

There's an option to set custom url_field, but no way to do patch, because id is hardcoded

flask-combo-jsonapi/flask_combo_jsonapi/resource.py

Lines 286 to 291 in 23a3ecf

	if "id" not in json_data["data"]:
	raise BadRequest('Missing id in "data" node', source={"pointer": "/data/id"})
	if str(json_data["data"]["id"]) != str(kwargs[getattr(self._data_layer, "url_field", "id")]):
	raise BadRequest(
	"Value of id does not match the resource identifier in url", source={"pointer": "/data/id"}
	)

I know that another pk field is violation of JSON:API spec, but this feature would be neat

[Znbiz]

This required is dictated the https://marshmallow-jsonapi.readthedocs.io/en/latest/_modules/marshmallow_jsonapi/schema.html

"""Schema class that formats data according to JSON API 1.0.
    Must define the ``type_`` `class Meta` option.

    Example: ::

        from marshmallow_jsonapi import Schema, fields

        def dasherize(text):
            return text.replace('_', '-')

        class PostSchema(Schema):
            id = fields.Str(dump_only=True)  # Required
            title = fields.Str()

            author = fields.HyperlinkRelated(
                '/authors/{author_id}',
                url_kwargs={'author_id': '<author.id>'},
            )

            comments = fields.HyperlinkRelated(
                '/posts/{post_id}/comments',
                url_kwargs={'post_id': '<id>'},
                # Include resource linkage
                many=True, include_resource_linkage=True,
                type_='comments'
            )

            class Meta:
                type_ = 'posts'  # Required
                inflect = dasherize

    """

[mahenzon]

another use-case:

    api.route(
        views.CompanyDetail,
        "company_detail",
        "/api/company/<int:id>/",
        "/api/company/<string:company_number>/",
        tag="CompanyInfo",
    )

Swagger generates two endpoints but both require id. We have to make it more flexible

[mahenzon]

I suggest such a patch:

        pk_field_name = getattr(self._data_layer, "url_field", "id")

        if pk_field_name not in json_data["data"]:
            raise BadRequest(f'Missing {pk_field_name} in "data" node', source={"pointer": f"/data/{pk_field_name}"})
        if str(json_data["data"][pk_field_name]) != str(kwargs[pk_field_name]):
            raise BadRequest(
                "Value of id does not match the resource identifier in url", source={"pointer": f"/data/{pk_field_name}"}
            )