Refs #30581 -- Allowed sql.Query to be used without model.

2 files changed, 19 insertions, 7 deletions

diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py
index 28d412e11a..ce2787b6c0 100644
--- a/django/db/models/sql/compiler.py
+++ b/django/db/models/sql/compiler.py
@@ -310,8 +310,8 @@ class SQLCompiler:
             ordering = self.query.order_by
         elif self.query.order_by:
             ordering = self.query.order_by
-        elif self.query.get_meta().ordering:
-            ordering = self.query.get_meta().ordering
+        elif (meta := self.query.get_meta()) and meta.ordering:
+            ordering = meta.ordering
             self._meta_ordering = ordering
         else:
             ordering = []
@@ -645,7 +645,11 @@ class SQLCompiler:
                     params.extend(s_params)
                     out_cols.append(s_sql)
 
-                result += [", ".join(out_cols), "FROM", *from_]
+                result += [", ".join(out_cols)]
+                if from_:
+                    result += ["FROM", *from_]
+                elif self.connection.features.bare_select_suffix:
+                    result += [self.connection.features.bare_select_suffix]
                 params.extend(f_params)
 
                 if self.query.select_for_update and features.has_select_for_update:
@@ -796,7 +800,8 @@ class SQLCompiler:
         """
         result = []
         if opts is None:
-            opts = self.query.get_meta()
+            if (opts := self.query.get_meta()) is None:
+                return result
         only_load = self.deferred_to_columns()
         start_alias = start_alias or self.query.get_initial_alias()
         # The 'seen_models' is used to optimize checking the needed parent
diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index 31a66cec46..54f3258eac 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -46,6 +46,8 @@ __all__ = ["Query", "RawQuery"]
 
 
 def get_field_names_from_opts(opts):
+    if opts is None:
+        return set()
     return set(
         chain.from_iterable(
             (f.name, f.attname) if f.concrete else (f.name,) for f in opts.get_fields()
@@ -301,7 +303,8 @@ class Query(BaseExpression):
         processing. Normally, this is self.model._meta, but it can be changed
         by subclasses.
         """
-        return self.model._meta
+        if self.model:
+            return self.model._meta
 
     def clone(self):
         """
@@ -994,8 +997,10 @@ class Query(BaseExpression):
         if self.alias_map:
             alias = self.base_table
             self.ref_alias(alias)
-        else:
+        elif self.model:
             alias = self.join(self.base_table_class(self.get_meta().db_table, None))
+        else:
+            alias = None
         return alias
 
     def count_active_tables(self):
@@ -1619,6 +1624,8 @@ class Query(BaseExpression):
             field = None
             filtered_relation = None
             try:
+                if opts is None:
+                    raise FieldDoesNotExist
                 field = opts.get_field(name)
             except FieldDoesNotExist:
                 if name in self.annotation_select:
@@ -1673,7 +1680,7 @@ class Query(BaseExpression):
             # Check if we need any joins for concrete inheritance cases (the
             # field lives in parent, but we are currently in one of its
             # children)
-            if model is not opts.model:
+            if opts is not None and model is not opts.model:
                 path_to_parent = opts.get_path_to_parent(model)
                 if path_to_parent:
                     path.extend(path_to_parent)