Fixed #23341 -- Added migration name to nonexistent migration error in makemigrations.

2 files changed, 6 insertions, 6 deletions

diff --git a/django/db/migrations/graph.py b/django/db/migrations/graph.py
index 59578b110f..27b4105dcc 100644
--- a/django/db/migrations/graph.py
+++ b/django/db/migrations/graph.py
@@ -35,11 +35,11 @@ class MigrationGraph(object):
     def add_node(self, node, implementation):
         self.nodes[node] = implementation
 
-    def add_dependency(self, child, parent):
+    def add_dependency(self, migration, child, parent):
         if child not in self.nodes:
-            raise KeyError("Dependency references nonexistent child node %r" % (child,))
+            raise KeyError("Migration %s dependencies references nonexistent child node %r" % (migration, child))
         if parent not in self.nodes:
-            raise KeyError("Dependency references nonexistent parent node %r" % (parent,))
+            raise KeyError("Migration %s dependencies references nonexistent parent node %r" % (migration, parent))
         self.dependencies.setdefault(child, set()).add(parent)
         self.dependents.setdefault(parent, set()).add(child)
 
diff --git a/django/db/migrations/loader.py b/django/db/migrations/loader.py
index 2fb2098e48..9a3dd80d47 100644
--- a/django/db/migrations/loader.py
+++ b/django/db/migrations/loader.py
@@ -230,7 +230,7 @@ class MigrationLoader(object):
                 if parent[0] != key[0] or parent[1] == '__first__':
                     # Ignore __first__ references to the same app (#22325)
                     continue
-                self.graph.add_dependency(key, parent)
+                self.graph.add_dependency(migration, key, parent)
         for key, migration in normal.items():
             for parent in migration.dependencies:
                 if parent[0] == key[0]:
@@ -238,11 +238,11 @@ class MigrationLoader(object):
                     continue
                 parent = self.check_key(parent, key[0])
                 if parent is not None:
-                    self.graph.add_dependency(key, parent)
+                    self.graph.add_dependency(migration, key, parent)
             for child in migration.run_before:
                 child = self.check_key(child, key[0])
                 if child is not None:
-                    self.graph.add_dependency(child, key)
+                    self.graph.add_dependency(migration, child, key)
 
     def detect_conflicts(self):
         """