diff --git a/django/db/models/query.py b/django/db/models/query.py
index 915acb629a..43dd11c7d7 100644
--- a/django/db/models/query.py
+++ b/django/db/models/query.py
@@ -2077,7 +2077,9 @@ class RawQuerySet:
         """Resolve the init field names and value positions."""
         converter = connections[self.db].introspection.identifier_converter
         model_init_fields = [
-            f for f in self.model._meta.fields if converter(f.column) in self.columns
+            field
+            for column_name, field in self.model_fields.items()
+            if column_name in self.columns
         ]
         annotation_fields = [
             (column, pos)
@@ -2192,10 +2194,13 @@ class RawQuerySet:
     def model_fields(self):
         """A dict mapping column names to model field names."""
         converter = connections[self.db].introspection.identifier_converter
-        model_fields = {}
-        for field in self.model._meta.fields:
-            model_fields[converter(field.column)] = field
-        return model_fields
+        return {
+            converter(field.column): field
+            for field in self.model._meta.fields
+            # Fields with None "column" should be ignored
+            # (e.g. CompositePrimaryKey).
+            if field.column
+        }
 
 
 class Prefetch: