Re: How do I prevent delete from table that has foreign key references

[Hannu Krosing]

On 01/20/2013 08:12 PM, Subodh Nijsure wrote:

Hi,

Say I have model that comprises of Books and Authors. Where a book may 
have multiple authors and this has foreignkey in the books table.


Now how do I prevent deletion of an author record while the there is 
record in books table that has pointer an author record (via foreign key).


Do i need to do this via stored procedure/trigger on DB level or is 
there standard procedure to implement this in delete in django?


Any decent database enforces foreign keys automatically.

Hannu

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Re: Help Required on DB Connection and Data Access

[Hannu Krosing]

On 05/03/2013 03:48 PM, Lakshmi Prasad wrote:
> Hi
>  
> I am new to Python-Django Development
>  
> we have one django application running on windows machine and DB which
> I needs to access is from Linux machine. First of all I want  to
> connect to Linux machine and I need to access the DB tables from  my
> windows machine. Please help me to write connection string and
> required parameters to be passed in order to access DB
connection string is just "host=xxx dbname=yyy port=5432"

most likely you also need on linux/database side to:

edit the port postgresql listens on in postgresql.conf (requires
postgresql restart)

and

edit pg_hba.conf to allow connections from your windows machine

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Re: ANNOUNCE: Django 1.6 beta 1 released

[Hannu Krosing]

On 06/28/2013 03:48 PM, Jacob Kaplan-Moss wrote:
> Hi folks --
>
> I'm pleased to announce that we've just released Django 1.6 beta 1,
> the second in our series of preview releases leading up to Django 1.6
> (due in August).
>
> More information can be found on our blog:
>
>  
>   https://www.djangoproject.com/weblog/2013/jun/28/django-16-beta-1-released/
>
> And in the release notes:
>
> https://docs.djangoproject.com/en/dev/releases/1.6/
Is there any hope to get https://code.djangoproject.com/ticket/6148
integrated int 1.6 ?

This is about using schemas in databases which support them well enough
(PostgreSQL, Oracle, ...)

Hannu Krosing

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Re: Comments in real time

[Hannu Krosing]

On 08/20/2014 05:11 PM, Aaron Reabow wrote:
> Hi all,
>
> I use a proprietary application that let people on multiple browsers
> comment.
>
> In real time their comments are displayed for everyone to see.
>
> What is quite nice, is that you can then order and group these comments.
>
> I have looked through the Django apps, but am unsure if any of them
> will give me similar capabilities (or parts thereof).
>
> Would anyone have a suggestion on where to start looking.  My
> alternative would be to then build the interactivity in javascript.
You will be needing some Javascript anyway

Start by googling: socket.io django

Cheers

>
> many thanks in advance,
>
> Aaron
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Re: No modpython.py in python-django 1.6.6-1, which package includes modpython.py?

[Hannu Krosing]

On 09/17/2014 01:52 PM, nobody wrote:
>
> Hi,
>
> In Debian 6.0.4, I installed python-django  1.4.5-1 which got
> /usr/lib/python2.6/dist-packages/django/contrib/auth/handlers/modpython.py.
> That file is not included in python-django  1.6.6-1 for the Wheezy,
> and I've got following error from apache2. How can I fix it? Which
> package should I install to get the modpython.py?
Try libapache2-mod-python

Cheers
Hannu

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Re: Postgres database server

[Hannu Krosing]

On 10/13/2014 08:31 PM, sheyda kianimehr wrote:
> Yes, I did but when I want to run server python manage.py runserver
> I got this message
>
> django.db.utils.OperationalError: FATAL:  password authentication
> failed for user "postgres"
> FATAL:  password authentication failed for user "postgres"
>
> You think there is a problem with my DB?
> I have made a new DataBase and I can access that at terminal.
Do you actually access the database "at the terminal" as the user you
run django ?

Do you use the same address (IP vs. unix sockets) ?

>
> On Saturday, October 11, 2014 12:33:03 PM UTC-5, Thomas wrote:
>
>
> On Oct 11, 2014, at 10:10 AM, sheyda kianimehr  > wrote:
>
>> Hi guys I have a problem.
>> I am so new in Django and Postgres
>>
>> I am installed python, django, postgres on Ubuntu (acording to
>> https://docs.djangoproject.com/en/1.7/intro/tutorial01/
>> )
>> but I have problem in seting up The development server,
>> I see password for postgres user error after typing this is my
>> Terminal
>> python manage.py runserver
>>
>> I put a password in setting.py file but it doesn’t work yet.
> Are you sure that you are accessing the database through django
> the way the database expects?
>
> You should be able to access your database through the command line:
>
> psql -U your_db_username dbname
>
> Send your DATABASES variable from the settings file and we might
> have some more suggestions.
>
> hth
>
> - Tom
>
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Re: jquery in included html file

[Hannu Krosing]

On 05/05/2014 09:30 AM, Andreas Bloch wrote:
> How do you access (or include) jquery in a file, which is included?
> I'm getting a "Uncaught ReferenceError: $ is not defined" when trying
> to use jquery in the included file...
Is jquery there when you look at the page source ?
>
> In my template, that extends base.html, I am able to use jquery but
> not the file I'm including with {% include 'nav.html' %} in the template.
>
> I could just put my 

Re: Transform list comprehension back to traditional looping construct, how?

[Hannu Krosing]

On 06/01/2014 03:00 PM, Pepsodent Cola wrote:
> At first I was trying to use list.append but then Python complained
> that append could only take 1 argument.  So I google around and
> list.extend said that it could take more arguments so I just went with it.
>
> What is this right method you are thinking about? 
list.append()

instead of

list.append(individual, tuple, elements)

> My imagination is very limited I only know of append but not sure how
> to work with it in this situation.
>
>
>
> On Sunday, June 1, 2014 2:52:33 PM UTC+2, Masklinn wrote:
>
>
> On 2014-06-01, at 14:29 , Pepsodent Cola  > wrote:
>
> > Hi, I want to transform my articles_list5 list comprehension
> back to a traditional looping construct to make things easier to
> read.
> > The articles_list5 returns a list of tuples.
> >
> > But when I try to do the same using traditional looping in
> articles_list6 then I just get one long list from everything.  How
> do I transform list5 to list6 correctly so it still returns a list
> of tuples?
>
> By using the right method? Why are you calling list.extend?
>
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Re: Python Brasil[10]

[Hannu Krosing]

On 06/14/2014 05:20 AM, Renato Oliveira wrote:
> Hi all!
>
> My name is Renato Oliveira, I'm board member of Python Brazil
> Association and co-chair of the next Python Brasil Conference
> . This year the conf is taking place in
> Porto de Galinhas, Pernambuco  (for ten
> times in a row elected the most beautiful Brazilian beach) on Nov 4 -
> Nov 8 with some special activities (TBA) on November 9th.
>
> The tickets will be available on Monday, and we just announced our
> first keynote: Alex Gaynor
> 

>
> How can you help us? Attending, Spreading the word in your local
> groups and sponsoring the conference.
Is the Call for Proposals still open ?

I did not see neither schedule nor cCFP on the website.

Cheers
Hannu

> The prospectus is here
> .
>
> If you're planning to come to the conference and need help to find a
> place to stay, just need some tips or have any kind of doubt, please
> let me know.
>
> Best regards,
>
> Renato Oliveira
> @_renatooliveira 
> Labcodes - www.labcodes.com.br 
>
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