def update_variant_compounds(self, variant, variant_objs = None):
        """Update compounds for a variant.

        This will add all the necessary information of a variant on a compound object.

        Args:
            variant(scout.models.Variant)
            variant_objs(dict): A dictionary with _ids as keys and variant objs as values.

        Returns:
            compound_objs(list(dict)): A dictionary with updated compound objects.

        """
        compound_objs = []
        for compound in variant.get('compounds', []):
            not_loaded = True
            gene_objs = []
            # Check if the compound variant exists
            if variant_objs:
                variant_obj = variant_objs.get(compound['variant'])
            else:
                variant_obj = self.variant_collection.find_one({'_id': compound['variant']})
            if variant_obj:
                # If the variant exosts we try to collect as much info as possible
                not_loaded = False
                compound['rank_score'] = variant_obj['rank_score']
                for gene in variant_obj.get('genes', []):
                    gene_obj = {
                        'hgnc_id': gene['hgnc_id'],
                        'hgnc_symbol': gene.get('hgnc_symbol'),
                        'region_annotation': gene.get('region_annotation'),
                        'functional_annotation': gene.get('functional_annotation'),
                    }
                    gene_objs.append(gene_obj)
                    compound['genes'] = gene_objs

            compound['not_loaded'] = not_loaded
            compound_objs.append(compound)

        return compound_objs
Update compounds for a variant.

        This will add all the necessary information of a variant on a compound object.

        Args:
            variant(scout.models.Variant)
            variant_objs(dict): A dictionary with _ids as keys and variant objs as values.

        Returns:
            compound_objs(list(dict)): A dictionary with updated compound objects.