[1.6.x] Fixed #21413 -- resolve_columns fields misalignment

Backpatch of 9918c11114ac3ec9622631558ef26ebf3919cb69 from master.

Conflicts:

	django/db/models/sql/compiler.py
	tests/model_inheritance_regress/tests.py

1 files changed, 8 insertions, 7 deletions

diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py
index a3e7de3788..0ab53ecc71 100644
--- a/django/db/models/sql/compiler.py
+++ b/django/db/models/sql/compiler.py
@@ -289,7 +289,7 @@ class SQLCompiler(object):
             if table in only_load and field.column not in only_load[table]:
                 continue
             if as_pairs:
-                result.append((alias, field.column))
+                result.append((alias, field))
                 aliases.add(alias)
                 continue
             if with_aliases and field.column in col_aliases:
@@ -650,10 +650,10 @@ class SQLCompiler(object):
             _, _, _, joins, _ = self.query.setup_joins(
                 [f.name], opts, root_alias, outer_if_first=promote)
             alias = joins[-1]
-            columns, aliases = self.get_default_columns(start_alias=alias,
+            columns, _ = self.get_default_columns(start_alias=alias,
                     opts=f.rel.to._meta, as_pairs=True)
             self.query.related_select_cols.extend(
-                SelectInfo(col, field) for col, field in zip(columns, f.rel.to._meta.concrete_fields))
+                SelectInfo((col[0], col[1].column), col[1]) for col in columns)
             if restricted:
                 next = requested.get(f.name, {})
             else:
@@ -678,11 +678,10 @@ class SQLCompiler(object):
                 alias = joins[-1]
                 from_parent = (opts.model if issubclass(model, opts.model)
                                else None)
-                columns, aliases = self.get_default_columns(start_alias=alias,
+                columns, _ = self.get_default_columns(start_alias=alias,
                     opts=model._meta, as_pairs=True, from_parent=from_parent)
                 self.query.related_select_cols.extend(
-                    SelectInfo(col, field) for col, field
-                    in zip(columns, model._meta.concrete_fields))
+                    SelectInfo((col[0], col[1].column), col[1]) for col in columns)
                 next = requested.get(f.related_query_name(), {})
                 # Use True here because we are looking at the _reverse_ side of
                 # the relation, which is always nullable.
@@ -728,8 +727,10 @@ class SQLCompiler(object):
                         # found in get_columns(). It would be nice to clean this up.
                         if self.query.select:
                             fields = [f.field for f in self.query.select]
-                        else:
+                        elif self.query.default_cols:
                             fields = self.query.get_meta().concrete_fields
+                        else:
+                            fields = []
                         fields = fields + [f.field for f in self.query.related_select_cols]
 
                         # If the field was deferred, exclude it from being passed