README.md edited

.venv/lib/python3.10/site-packages/django/contrib/postgres/aggregates/mixins.py

@@ -0,0 +1,47 @@
+from django.core.exceptions import FullResultSet
+from django.db.models.expressions import OrderByList
+
+
+class OrderableAggMixin:
+    def __init__(self, *expressions, ordering=(), **extra):
+        if not ordering:
+            self.order_by = None
+        elif isinstance(ordering, (list, tuple)):
+            self.order_by = OrderByList(*ordering)
+        else:
+            self.order_by = OrderByList(ordering)
+        super().__init__(*expressions, **extra)
+
+    def resolve_expression(self, *args, **kwargs):
+        if self.order_by is not None:
+            self.order_by = self.order_by.resolve_expression(*args, **kwargs)
+        return super().resolve_expression(*args, **kwargs)
+
+    def get_source_expressions(self):
+        return super().get_source_expressions() + [self.order_by]
+
+    def set_source_expressions(self, exprs):
+        *exprs, self.order_by = exprs
+        return super().set_source_expressions(exprs)
+
+    def as_sql(self, compiler, connection):
+        *source_exprs, filtering_expr, ordering_expr = self.get_source_expressions()
+
+        order_by_sql = ""
+        order_by_params = []
+        if ordering_expr is not None:
+            order_by_sql, order_by_params = compiler.compile(ordering_expr)
+
+        filter_params = []
+        if filtering_expr is not None:
+            try:
+                _, filter_params = compiler.compile(filtering_expr)
+            except FullResultSet:
+                pass
+
+        source_params = []
+        for source_expr in source_exprs:
+            source_params += compiler.compile(source_expr)[1]
+
+        sql, _ = super().as_sql(compiler, connection, ordering=order_by_sql)
+        return sql, (*source_params, *order_by_params, *filter_params)