I am facing a problem with my project, I posted about it on Stack Overflow,
here is the link:
http://stackoverflow.com/questions/28539441/reference-objects-using-foreign-keys-in-django-forms
Here is m code on github, I am currently working on the feature_forms
branch: https://github.com/keta
Take a look at the `extra` method of the queryset in Django. It allows you to
do what you are trying to do by raw SQL.
https://docs.djangoproject.com/en/1.9/ref/models/querysets/#django.db.models.query.QuerySet.extra
Check the above link, the example with `annotate` will be interesting for you.
Can you not do something like
`qs.filter(...info that is coming in...).exists()`
If ^ is True, then update it, otherwise create a new object?
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Hey Erik,
What Django version are you on?
On Tuesday, May 24, 2016 at 1:28:57 AM UTC+5:30, Erik Cederstrand wrote:
>
> Hi,
>
> I have inherited a legacy Item model that has a composite unique key
> consisting of a Customer ID and a per-customer, incrementing Item ID.
> Assume I can't change th
The official tutorial is difficult for a beginner, it was for me.
I would suggest you start with Django girls, or "Tango with Django"
On Thu, May 26, 2016, 5:52 PM Jani Tiainen wrote:
> And after that official tutorial there exists Django Girls and Django
> Taskbuster which are much more verbos
It just means the "field_name" you are using in the filter query doesn't
exist.
Multiple reasons:
1. The model doesn't really have that field in its definition.
2. You forgot migrating your database.
3. The field name being sent from your form is not right.
To get a clearer picture, try the same
This is how you can compress the images while saving:
```python
import urllib2
import cStringIO
from boto3.session import Session
from PIL import Image
aws_session = Session(
aws_access_key_id=settings.AWS_ACCESS_KEY_ID,
aws_secret_access_key=settings.AWS_SECRET_ACCESS_KEY,
region
I am storing links of these images as I need to show them on the frontend,
not connected to any user.
But I have done what you are talking about too.
So Django gives you a Model File Field. Add that to your Model. That will
allow you to save and store files. While saving a model object, just use
t
I have a method that updates a row in the table.
To avoid race condition, I locked the row using `select_for_update` inside
an `atomic` block and doing the update.
This method is called from a celery task.
This works well on my local machine. But when this gets called on my
production server (two
eads/writes to another db?
>
> Cheers,
> Simon
>
> Le samedi 25 mars 2017 15:08:19 UTC-4, Ketan Bhatt a écrit :
>
> I have a method that updates a row in the table.
> To avoid race condition, I locked the row using `select_for_update` inside
> an `atomic` block and doing t
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