Method max_name_length

django/contrib/postgres/indexes.py:19–24

(self)

class PostgresIndex(CheckPostgresInstalledMixin, Index):
    @cached_property
    def max_name_length(self):
        # Allow an index name longer than 30 characters when the suffix is
        # longer than the usual 3 character limit. The 30 character limit for
        # cross-database compatibility isn't applicable to PostgreSQL-specific
        # indexes.
        return Index.max_name_length - len(Index.suffix) + len(self.suffix)

    def create_sql(self, model, schema_editor, using="", **kwargs):
        self.check_supported(schema_editor)