def fields_subset()

in scripts/generators/ecs_helpers.py [0:0]

• 13 lines of code
• 8 McCabe index (conditional complexity)

def fields_subset(subset, fields):
    retained_fields = {}
    allowed_options = ['fields']
    for key, val in subset.items():
        for option in val:
            if option not in allowed_options:
                raise ValueError('Unsupported option found in subset: {}'.format(option))
        # A missing fields key is shorthand for including all subfields
        if 'fields' not in val or val['fields'] == '*':
            retained_fields[key] = fields[key]
        elif isinstance(val['fields'], dict):
            # Copy the full field over so we get all the options, then replace the 'fields' with the right subset
            retained_fields[key] = fields[key]
            retained_fields[key]['fields'] = fields_subset(val['fields'], fields[key]['fields'])
    return retained_fields