Method single_alias

django/db/models/sql/compiler.py:1974–1977

(self)

class SQLDeleteCompiler(SQLCompiler):
    @cached_property
    def single_alias(self):
        # Ensure base table is in aliases.
        self.query.get_initial_alias()
        return sum(self.query.alias_refcount[t] > 0 for t in self.query.alias_map) == 1

    @classmethod
    def _expr_refs_base_model(cls, expr, base_model):