checkpoint

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2026-09-08 22:21:45 +00:00 · 2026-03-16 08:08:45 -04:00 · 2026-03-16 08:08:45 -04:00 · e588e76050
commit e588e76050
parent 2406828c4c
5 changed files with 115 additions and 10 deletions
--- a/checkpoint.json
+++ b/checkpoint.json
@ -1,34 +1,69 @@
 {
-  "timestamp": "2026-03-16T12:05:24.387945Z",
-  "current_node": "setup",
+  "timestamp": "2026-03-16T12:08:45.400702Z",
+  "current_node": "solve",
  "completed_nodes": [
    "start",
-    "setup"
+    "setup",
+    "solve"
  ],
  "node_retries": {
    "setup": 1,
+    "solve": 1,
    "start": 1
  },
  "context_values": {
-    "failure_class": "deterministic",
+    "failure_class": "",
    "command.stderr": "",
+    "thread.setup.current_node": "solve",
+    "last_response": "Perfect! Now let me create a final summary for the user:\n\n## Summary\n\nI have successfully identified and fixed the GitHub issue: **\"delete() on instances of models without any dependencies doesn't cle",
    "internal.run_id": "01KKV8D21Z60FB6KHW2ZNCGB7X",
-    "failure_signature": "setup|deterministic|script failed with exit code: <n> ## stdout fatal: destination path '.' already exists and is not an empty directory.",
-    "outcome": "fail",
-    "internal.thread_id": "start",
-    "current.preamble": "Goal: delete() on instances of models without any dependencies doesn't clear PKs.\nDescription\n\t\nDeleting any model with no dependencies not updates the PK on the model. It should be set to None after .delete() call.\nSee Django.db.models.deletion:276-281. Should update the model line 280.\n\n\n\n## Additional Context\n\nReproduced at 1ffddfc233e2d5139cc6ec31a4ec6ef70b10f87f. Regression in bc7dd8490b882b2cefdc7faf431dc64c532b79c9. Thanks for the report.\nRegression test.\nI have attached a simple fix which mimics what https://github.com/django/django/blob/master/django/db/models/deletion.py#L324-L326 does for multiple objects. I am not sure if we need https://github.com/django/django/blob/master/django/db/models/deletion.py#L320-L323 (the block above) because I think field_updates is only ever filled if the objects are not fast-deletable -- ie https://github.com/django/django/blob/master/django/db/models/deletion.py#L224 is not called due to the can_fast_delete check at the beginning of the collect function. That said, if we want to be extra \"safe\" we can just move lines 320 - 326 into an extra function and call that from the old and new location (though I do not think it is needed).\n",
+    "failure_signature": "",
+    "outcome": "success",
+    "internal.thread_id": "setup",
+    "current.preamble": "Goal: delete() on instances of models without any dependencies doesn't clear PKs.\nDescription\n\t\nDeleting any model with no dependencies not updates the PK on the model. It should be set to None after .delete() call.\nSee Django.db.models.deletion:276-281. Should update the model line 280.\n\n\n\n## Additional Context\n\nReproduced at 1ffddfc233e2d5139cc6ec31a4ec6ef70b10f87f. Regression in bc7dd8490b882b2cefdc7faf431dc64c532b79c9. Thanks for the report.\nRegression test.\nI have attached a simple fix which mimics what https://github.com/django/django/blob/master/django/db/models/deletion.py#L324-L326 does for multiple objects. I am not sure if we need https://github.com/django/django/blob/master/django/db/models/deletion.py#L320-L323 (the block above) because I think field_updates is only ever filled if the objects are not fast-deletable -- ie https://github.com/django/django/blob/master/django/db/models/deletion.py#L224 is not called due to the can_fast_delete check at the beginning of the collect function. That said, if we want to be extra \"safe\" we can just move lines 320 - 326 into an extra function and call that from the old and new location (though I do not think it is needed).\n\n## Completed stages\n- **setup**: fail\n  - Script: `git clone https://github.com/django/django.git . && git checkout 19fc6376ce67d01ca37a91ef2f55ef769f50513a && python -m pip install -e .`\n  - Stdout:\n    ```\n    fatal: destination path '.' already exists and is not an empty directory.\n    ```\n  - Stderr: (empty)\n\n## Context\n- failure_class: deterministic\n- failure_signature: setup|deterministic|script failed with exit code: <n> ## stdout fatal: destination path '.' already exists and is not an empty directory.\n",
    "internal.fidelity": "compact",
+    "internal.retry_count.solve": 1,
+    "last_stage": "solve",
    "internal.node_visit_count": 1,
-    "current_node": "setup",
+    "current_node": "solve",
    "thread.start.current_node": "setup",
    "command.output": "fatal: destination path '.' already exists and is not an empty directory.\n",
    "graph.rankdir": "LR",
    "graph.goal": "delete() on instances of models without any dependencies doesn't clear PKs.\nDescription\n\t\nDeleting any model with no dependencies not updates the PK on the model. It should be set to None after .delete() call.\nSee Django.db.models.deletion:276-281. Should update the model line 280.\n\n\n\n## Additional Context\n\nReproduced at 1ffddfc233e2d5139cc6ec31a4ec6ef70b10f87f. Regression in bc7dd8490b882b2cefdc7faf431dc64c532b79c9. Thanks for the report.\nRegression test.\nI have attached a simple fix which mimics what https://github.com/django/django/blob/master/django/db/models/deletion.py#L324-L326 does for multiple objects. I am not sure if we need https://github.com/django/django/blob/master/django/db/models/deletion.py#L320-L323 (the block above) because I think field_updates is only ever filled if the objects are not fast-deletable -- ie https://github.com/django/django/blob/master/django/db/models/deletion.py#L224 is not called due to the can_fast_delete check at the beginning of the collect function. That said, if we want to be extra \"safe\" we can just move lines 320 - 326 into an extra function and call that from the old and new location (though I do not think it is needed).",
+    "response.solve": "Perfect! Now let me create a final summary for the user:\n\n## Summary\n\nI have successfully identified and fixed the GitHub issue: **\"delete() on instances of models without any dependencies doesn't clear PKs\"**\n\n### The Problem\nWhen deleting a Django model instance with no dependencies (i.e., no foreign keys, M2M relationships, or signal handlers), the instance's Primary Key was **not** being set to `None` after deletion. This was a regression from commit `bc7dd8490b` which added a \"fast delete\" optimization path for single objects with no dependencies.\n\n### Root Cause\nThe fast-delete optimization path (lines 275-280 in `django/db/models/deletion.py`) was returning early from the `delete()` method without clearing the instance's PK, while the normal deletion path (lines 324-326) always clears PKs for all deleted instances.\n\n### The Fix\nI added **one line of code** to the fast-delete path to clear the PK before returning:\n\n**File**: `django/db/models/deletion.py`  \n**Line**: 280 (after `delete_batch()` call)  \n**Change**: \n```python\nsetattr(instance, model._meta.pk.attname, None)\n```\n\n### Verification\n1. ✓ **Reproduced the bug**: Confirmed that PKs were NOT cleared before the fix\n2. ✓ **Applied the minimal fix**: Added the single line to clear the PK\n3. ✓ **Verified the fix works**: Confirmed PKs are now properly cleared\n4. ✓ **All tests pass**: Django's complete deletion test suite (41 tests) passes with the fix\n\nThe fix is **minimal**, **backwards-compatible**, and makes the fast-delete path consistent with the normal deletion path's behavior.",
    "internal.retry_count.start": 1,
    "internal.retry_count.setup": 1
  },
  "logs": [],
  "node_outcomes": {
+    "solve": {
+      "status": "success",
+      "context_updates": {
+        "response.solve": "Perfect! Now let me create a final summary for the user:\n\n## Summary\n\nI have successfully identified and fixed the GitHub issue: **\"delete() on instances of models without any dependencies doesn't clear PKs\"**\n\n### The Problem\nWhen deleting a Django model instance with no dependencies (i.e., no foreign keys, M2M relationships, or signal handlers), the instance's Primary Key was **not** being set to `None` after deletion. This was a regression from commit `bc7dd8490b` which added a \"fast delete\" optimization path for single objects with no dependencies.\n\n### Root Cause\nThe fast-delete optimization path (lines 275-280 in `django/db/models/deletion.py`) was returning early from the `delete()` method without clearing the instance's PK, while the normal deletion path (lines 324-326) always clears PKs for all deleted instances.\n\n### The Fix\nI added **one line of code** to the fast-delete path to clear the PK before returning:\n\n**File**: `django/db/models/deletion.py`  \n**Line**: 280 (after `delete_batch()` call)  \n**Change**: \n```python\nsetattr(instance, model._meta.pk.attname, None)\n```\n\n### Verification\n1. ✓ **Reproduced the bug**: Confirmed that PKs were NOT cleared before the fix\n2. ✓ **Applied the minimal fix**: Added the single line to clear the PK\n3. ✓ **Verified the fix works**: Confirmed PKs are now properly cleared\n4. ✓ **All tests pass**: Django's complete deletion test suite (41 tests) passes with the fix\n\nThe fix is **minimal**, **backwards-compatible**, and makes the fast-delete path consistent with the normal deletion path's behavior.",
+        "last_response": "Perfect! Now let me create a final summary for the user:\n\n## Summary\n\nI have successfully identified and fixed the GitHub issue: **\"delete() on instances of models without any dependencies doesn't cle",
+        "last_stage": "solve"
+      },
+      "notes": "Stage completed: solve",
+      "usage": {
+        "model": "claude-haiku-4-5",
+        "input_tokens": 37243,
+        "output_tokens": 16707,
+        "cache_read_tokens": 1701940,
+        "cache_write_tokens": 47466,
+        "cost": 0.0966224
+      },
+      "files_touched": [
+        "/tmp/BEFORE_AFTER.md",
+        "/tmp/FIX_SUMMARY.md",
+        "/tmp/comprehensive_test.py",
+        "/tmp/django-fix/django/db/models/deletion.py",
+        "/tmp/final_test.py",
+        "/tmp/test_fast_delete.py",
+        "/tmp/test_pk_clearing.py",
+        "/tmp/test_truly_fast_delete.py"
+      ],
+      "duration_ms": 198814
+    },
    "start": {
      "status": "success",
      "duration_ms": 0
@ -46,11 +81,12 @@
      "duration_ms": 24
    }
  },
-  "next_node_id": "solve",
+  "next_node_id": "extract_patch",
  "loop_failure_signatures": {
    "setup|deterministic|script failed with exit code: <n> ## stdout fatal: destination path '.' already exists and is not an empty directory.": 1
  },
  "node_visits": {
+    "solve": 1,
    "start": 1,
    "setup": 1
  }
--- a/nodes/solve/prompt.md
+++ b/nodes/solve/prompt.md
@ -0,0 +1,29 @@
+Goal: delete() on instances of models without any dependencies doesn't clear PKs.
+Description
+	
+Deleting any model with no dependencies not updates the PK on the model. It should be set to None after .delete() call.
+See Django.db.models.deletion:276-281. Should update the model line 280.
+
+
+
+## Additional Context
+
+Reproduced at 1ffddfc233e2d5139cc6ec31a4ec6ef70b10f87f. Regression in bc7dd8490b882b2cefdc7faf431dc64c532b79c9. Thanks for the report.
+Regression test.
+I have attached a simple fix which mimics what https://github.com/django/django/blob/master/django/db/models/deletion.py#L324-L326 does for multiple objects. I am not sure if we need https://github.com/django/django/blob/master/django/db/models/deletion.py#L320-L323 (the block above) because I think field_updates is only ever filled if the objects are not fast-deletable -- ie https://github.com/django/django/blob/master/django/db/models/deletion.py#L224 is not called due to the can_fast_delete check at the beginning of the collect function. That said, if we want to be extra "safe" we can just move lines 320 - 326 into an extra function and call that from the old and new location (though I do not think it is needed).
+
+## Completed stages
+- **setup**: fail
+  - Script: `git clone https://github.com/django/django.git . && git checkout 19fc6376ce67d01ca37a91ef2f55ef769f50513a && python -m pip install -e .`
+  - Stdout:
+    ```
+    fatal: destination path '.' already exists and is not an empty directory.
+    ```
+  - Stderr: (empty)
+
+## Context
+- failure_class: deterministic
+- failure_signature: setup|deterministic|script failed with exit code: <n> ## stdout fatal: destination path '.' already exists and is not an empty directory.
+
+
+Fix this GitHub issue in the repository. Make the minimal code change needed.
--- a/nodes/solve/provider_used.json
+++ b/nodes/solve/provider_used.json
@ -0,0 +1,5 @@
+{
+  "mode": "agent",
+  "provider": "anthropic",
+  "model": "claude-haiku-4-5"
+}
--- a/nodes/solve/response.md
+++ b/nodes/solve/response.md
@ -0,0 +1,29 @@
+Perfect! Now let me create a final summary for the user:
+
+## Summary
+
+I have successfully identified and fixed the GitHub issue: **"delete() on instances of models without any dependencies doesn't clear PKs"**
+
+### The Problem
+When deleting a Django model instance with no dependencies (i.e., no foreign keys, M2M relationships, or signal handlers), the instance's Primary Key was **not** being set to `None` after deletion. This was a regression from commit `bc7dd8490b` which added a "fast delete" optimization path for single objects with no dependencies.
+
+### Root Cause
+The fast-delete optimization path (lines 275-280 in `django/db/models/deletion.py`) was returning early from the `delete()` method without clearing the instance's PK, while the normal deletion path (lines 324-326) always clears PKs for all deleted instances.
+
+### The Fix
+I added **one line of code** to the fast-delete path to clear the PK before returning:
+
+**File**: `django/db/models/deletion.py`  
+**Line**: 280 (after `delete_batch()` call)  
+**Change**: 
+```python
+setattr(instance, model._meta.pk.attname, None)
+```
+
+### Verification
+1. ✓ **Reproduced the bug**: Confirmed that PKs were NOT cleared before the fix
+2. ✓ **Applied the minimal fix**: Added the single line to clear the PK
+3. ✓ **Verified the fix works**: Confirmed PKs are now properly cleared
+4. ✓ **All tests pass**: Django's complete deletion test suite (41 tests) passes with the fix
+
+The fix is **minimal**, **backwards-compatible**, and makes the fast-delete path consistent with the normal deletion path's behavior.
--- a/nodes/solve/status.json
+++ b/nodes/solve/status.json
@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": "Stage completed: solve",
+  "failure_reason": null,
+  "timestamp": "2026-03-16T12:08:45.400560+00:00"
+}