https://github.com/jpablo/django-orm-lambdas

A LINQ-esque Manager for Django models
https://github.com/jpablo/django-orm-lambdas

Last synced: 25 days ago
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A LINQ-esque Manager for Django models

• Host: GitHub
• URL: https://github.com/jpablo/django-orm-lambdas
• Owner: jpablo
• Created: 2011-06-05T23:13:30.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2011-06-29T18:11:05.000Z (over 13 years ago)
• Last Synced: 2024-11-14T00:53:40.715Z (2 months ago)
• Language: Python
• Homepage:
• Size: 97.7 KB
• Stars: 5
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# LambdaManager

LambdaManager extends the regular django.db.models.Manager with one function:

```python

where(lambda x: ...)

```

that can be used like this:

## Example

```python

# in models.py:

from django.db import models

from lambda_manager import LambdaManager

class Poll(models.Model):

    question = models.CharField(max_length=200)

    pub_date = models.DateTimeField('date published')

    objects = LambdaManager()

class Choice(models.Model):

    poll = models.ForeignKey(Poll)

    choice = models.CharField(max_length=200)

    votes = models.IntegerField()

    anumber = models.IntegerField()

    objects = LambdaManager()

```

```python

# elsewhere:

from models import Choice

Choice.objects.where(lambda c: c.votes >= 1)

Choice.objects.where(lambda c: c.votes != 1)

Choice.objects.where(lambda c: c.poll.question.exact('aaa'))

Choice.objects.where(lambda c: c.poll.question.contains('aa'))

Choice.objects.where(lambda c: c.votes == c.anumber)

Choice.objects.where(lambda c: c.votes > c.anumber)

Choice.objects.where(lambda x: x.votes < x.votes + 1)

Choice.objects.where(lambda x: x.votes < x.votes + x.votes + 2)

```

## TODO:

Implement other arithmetic operators: *, -, /

```python

Entry.objects.filter(n_comments__gt=F('n_pingbacks') * 2)

```