Connection factory for graphene-sqlalchemy. This will add the field `totalCount` based on the specification of graphql.

totalCount_connection_factory.py

def connection_for_type(_type):
    """Added totalCount node on the Connectionfield"""

    class Connection(graphene.Connection):
        total_count = graphene.Int(
            description="Total count of {}s.".format(_type._meta.name))

        class Meta:
            description = name = _type._meta.name + 'Connection'
            node = _type

        def resolve_total_count(self, args, context, info):
            return self.length

    return Connection