From c8df17b6128a5311d9375da2b4a4885337b60e42 Mon Sep 17 00:00:00 2001
From: Jarek Glowacki <jarekwg@gmail.com>
Date: Sun, 8 May 2016 10:58:15 +1000
Subject: [PATCH] Included reverse deps in showmigrations

---
 .../management/commands/showmigrations.py     | 28 ++++++++++---------
 tests/migrations/test_commands.py             | 17 ++++++-----
 2 files changed, 23 insertions(+), 22 deletions(-)

diff --git a/django/core/management/commands/showmigrations.py b/django/core/management/commands/showmigrations.py
index 0d239b1eef..767aca139d 100644
--- a/django/core/management/commands/showmigrations.py
+++ b/django/core/management/commands/showmigrations.py
@@ -26,7 +26,11 @@ class Command(BaseCommand):
         )
         formats.add_argument(
             '--plan', '-p', action='store_const', dest='format', const='plan',
-            help='Shows all migrations in the order they will be applied.',
+            help=(
+                'Shows all migrations in the order they will be applied. '
+                'With a verbosity level of 2 or above all direct migration dependencies '
+                'and reverse dependencies (run_before) will be included.'
+            )
         )
 
         parser.set_defaults(format='list')
@@ -99,26 +103,24 @@ class Command(BaseCommand):
         for target in targets:
             for migration in graph.forwards_plan(target):
                 if migration not in seen:
-                    plan.append(graph.nodes[migration])
+                    node = graph.node_map[migration]
+                    plan.append(node)
                     seen.add(migration)
 
         # Output
-        def print_deps(migration):
+        def print_deps(node):
             out = []
-            for dep in migration.dependencies:
-                if dep[1] == "__first__":
-                    roots = graph.root_nodes(dep[0])
-                    dep = roots[0] if roots else (dep[0], "__first__")
-                out.append("%s.%s" % dep)
+            for parent in sorted(node.parents):
+                out.append("%s.%s" % parent.key)
             if out:
                 return " ... (%s)" % ", ".join(out)
             return ""
 
-        for migration in plan:
+        for node in plan:
             deps = ""
             if self.verbosity >= 2:
-                deps = print_deps(migration)
-            if (migration.app_label, migration.name) in loader.applied_migrations:
-                self.stdout.write("[X]  %s%s" % (migration, deps))
+                deps = print_deps(node)
+            if node.key in loader.applied_migrations:
+                self.stdout.write("[X]  %s.%s%s" % (node.key[0], node.key[1], deps))
             else:
-                self.stdout.write("[ ]  %s%s" % (migration, deps))
+                self.stdout.write("[ ]  %s.%s%s" % (node.key[0], node.key[1], deps))
diff --git a/tests/migrations/test_commands.py b/tests/migrations/test_commands.py
index 28e32c1602..a5f31f08cb 100644
--- a/tests/migrations/test_commands.py
+++ b/tests/migrations/test_commands.py
@@ -228,39 +228,38 @@ class MigrateTests(MigrationTestBase):
         """
         out = six.StringIO()
         call_command("showmigrations", format='plan', stdout=out)
-        self.assertIn(
+        self.assertEqual(
             "[ ]  migrations.0001_initial\n"
             "[ ]  migrations.0003_third\n"
-            "[ ]  migrations.0002_second",
+            "[ ]  migrations.0002_second\n",
             out.getvalue().lower()
         )
 
         out = six.StringIO()
         call_command("showmigrations", format='plan', stdout=out, verbosity=2)
-        self.assertIn(
+        self.assertEqual(
             "[ ]  migrations.0001_initial\n"
             "[ ]  migrations.0003_third ... (migrations.0001_initial)\n"
-            "[ ]  migrations.0002_second ... (migrations.0001_initial)",
+            "[ ]  migrations.0002_second ... (migrations.0001_initial, migrations.0003_third)\n",
             out.getvalue().lower()
         )
-
         call_command("migrate", "migrations", "0003", verbosity=0)
 
         out = six.StringIO()
         call_command("showmigrations", format='plan', stdout=out)
-        self.assertIn(
+        self.assertEqual(
             "[x]  migrations.0001_initial\n"
             "[x]  migrations.0003_third\n"
-            "[ ]  migrations.0002_second",
+            "[ ]  migrations.0002_second\n",
             out.getvalue().lower()
         )
 
         out = six.StringIO()
         call_command("showmigrations", format='plan', stdout=out, verbosity=2)
-        self.assertIn(
+        self.assertEqual(
             "[x]  migrations.0001_initial\n"
             "[x]  migrations.0003_third ... (migrations.0001_initial)\n"
-            "[ ]  migrations.0002_second ... (migrations.0001_initial)",
+            "[ ]  migrations.0002_second ... (migrations.0001_initial, migrations.0003_third)\n",
             out.getvalue().lower()
         )