django-yoloquery 0.1.4

LLM-backed, structured JSON output, schema-aware natural language queries for Django ORM

Django YOLOQuery

LLM‑Based Queries for the Django ORM

⚠️ This is just a Proof-of-Concept

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Why?

I want to see how badly LLMs can be integrated into our system

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TL;DR

authors = Author.objects.ai_query("get all authors named John")
books   = Book.objects.ai_query("books published after 2020 by American authors")
recent  = Author.objects.ai_query("authors with books published in the last 5 years")

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Install

pip install django-yoloquery

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Configure

Add to INSTALLED_APPS and set a few knobs in settings.py.

INSTALLED_APPS = [
    # ... your apps ...
    'django_yoloquery',
]

# Required: OpenAI API key (or set env OPENAI_API_KEY)
YOLOQUERY_OPENAI_API_KEY = "sk-..."

# Optional (shown with defaults)
YOLOQUERY_SCHEMA_DEPTH = 1            # how far to traverse relations
YOLOQUERY_INCLUDE_REVERSE = True      # include reverse relations (related_name / _set)
YOLOQUERY_LLM_MODEL = "gpt-4o-mini"   # pick your OpenAI model
YOLOQUERY_AUTO_INSTALL = ["myapp.*"]  # auto‑YOLO patch models

🔑 If YOLOQUERY_OPENAI_API_KEY is not set, YOLOQuery falls back to the OPENAI_API_KEY environment variable.

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Manual Wiring (if you don’t want auto‑patch)

from django.db import models
from django_yoloquery import YoloManager

class Author(models.Model):
    name       = models.CharField(max_length=200)
    country    = models.CharField(max_length=100)
    birth_date = models.DateField()

    objects = YoloManager()  # manual install

class Book(models.Model):
    title          = models.CharField(max_length=200)
    authors        = models.ManyToManyField(Author, related_name="books")
    published_date = models.DateField()
    isbn           = models.CharField(max_length=13)

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Auto‑Installation Patterns

YOLOQuery can monkey‑patch all the things at startup. Patterns are case‑sensitive app labels; model name matching is case‑insensitive.

YOLOQUERY_AUTO_INSTALL = [
    "myapp.*",        # all models in myapp
    "blog.Post",      # just that one model
    "*",              # YOLO EVERYTHING (seriously?)
]

When auto‑installed:

• The model’s default manager (.objects) is replaced with a YOLO manager.
• The original manager is saved as ._orig_objects.
• A .yolo alias also points at the YOLO manager because branding.

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What the LLM Sees

YOLOQuery builds a JSON description of your model + related models (depth configurable, reverse rels optional). Example schema snippet for Author:

{
  "root_model": "Author",
  "app_label": "myapp",
  "models": {
    "Author": {
      "fields": {
        "name":    {"type": "CharField", "null": false},
        "country": {"type": "CharField", "null": false},
        "birth_date": {"type": "DateField", "null": false}
      },
      "relationships": {
        "books": {"type": "REV", "to": "Book"}
      }
    },
    "Book": {
      "fields": {
        "title": {"type": "CharField", "null": false},
        "published_date": {"type": "DateField", "null": false}
      },
      "relationships": {
        "authors": {"type": "M2M", "to": "Author"}
      }
    }
  }
}

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Structured JSON Contract

The model must return JSON like:

{
  "status": "ok",
  "logic": "and",             // or "or"
  "filters": [
    {"path": "name", "op": "iexact", "value": "John"},
    {"path": "books__published_date", "op": "gt", "value": "2020-01-01"}
  ],
  "order_by": ["-published_date"],  // optional
  "limit": 10                        // optional
}

If the request can’t be translated (missing info / nonsense / hallucination danger), the model must respond:

{"status": "error", "message": "Missing value for field 'name'"}

YOLOQuery will turn that into an AIQueryLLMError (attached to an empty QuerySet unless raise_errors=True).

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Supported Query Concepts

You Say	LLM Might Output	Django Filters
"authors named john"	name iexact John	name__iexact="John"
"authors from usa or canada"	logic=or + country in [USA, Canada]	`Q(country__iexact="USA")	Q(country__iexact="Canada")`
"books published after 2020"	published_date gt 2020-01-01	published_date__gt=date(2020,1,1)
"authors with books after 2020"	books__published_date gt 2020-01-01	join across reverse M2M
"top 10 newest books"	order_by=-published_date, limit=10	.order_by('-published_date')[:10]

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Error Handling

YOLOQuery errs on the side of not doing something dumb:

qs = Author.objects.ai_query("authors where")  # incomplete!
if hasattr(qs, 'ai_error'):
    print("LLM said nope:", qs.ai_error)

Raise immediately:

Author.objects.ai_query("authors where", raise_errors=True)
# AIQueryLLMError: LLM could not translate query.

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Testing (No API Calls)

from django_yoloquery import DummyLLM

DUMMY_RESPONSES = {
    "authors named John": {
        "status": "ok",
        "filters": [{"path": "name", "op": "iexact", "value": "John"}]
    },
    "name is": {
        "status": "error", "message": "Missing value for name"
    },
}

dummy = DummyLLM(DUMMY_RESPONSES)
qs = Author.objects.ai_query("authors named John", llm=dummy)
assert list(qs.values_list("name", flat=True)) == ["John"]

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FAQ (Frequently Asked Questions No One Asked Yet)

Q: Does this belong in production? A: The library literally has YOLO in the name.

Q: Will it leak my schema to OpenAI? A: Yes, that’s how it works. Use stub schemas or anonymized field names if that’s a problem.

Q: Can I use Anthropic / local models? A: PRs welcome. Right now it’s OpenAI only; we rely on JSON Schema format.

Q: What if the model hallucinates? A: We validate every field + op; hallucinations become errors instead of DB hits. (We try, anyway.)

Q: Does it understand dates like "last quarter"? A: Depends on the model; we just validate output.

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Requirements

• Python 3.8+
• Django 3.2+
• openai>=1.0.0
• OpenAI API key

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License

MIT – see LICENSE.