Hello, newbie here.
i have a local Postgre database which will be filled with data (daily) on my local development machine. What is a good solution to transfer/sync/mirror this data to a production postgre database.
For what it's worth I'm developing in Python using Dajngo.
Thanks!
Hi,
How can I fix number of concurrent sessions allowed at app level?
Basically I want a limit to how many concurrent requests to this url to keep the server from getting congested.
I guess some middleware hack?
Thanks.
I have the following class that I am using to bookmark items:
class BookmarkedItem(models.Model):
is_bookmarked = models.BooleanField(default=False)
user = models.ForeignKey(User)
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
content_object = generic.GenericForeignKey()
And I am defining a reverse generic relationship as follows:
class Link(models.Model):
url = models.URLField()
bookmarks = generic.GenericRelation(BookmarkedItem)
In one of my views I generate a queryset of all links and add this to a context:
links = Link.objects.all()
context = {
'links': links
}
return render_to_response('links.html', context)
The problem I am having is how to traverse the generic relationship in my template. For each link I want to be able to check the is_bookmarked attribute and change the add/remove bookmark button according to whether the user already has it bookmarked or not. Is this possible to do in the template? Or do I have to do some additional filtering in the view and pass another queryset?
I understand I am able to filter queryset of Foreignkey or Many2ManyFields, however, how do I do that for a simple CharField that is a Select Widget (Select Tag).
For example:
PRODUCT_STATUS = (
("unapproved", "Unapproved"),
("approved", "Listed"),
#("Backorder","Backorder"),
#("oos","Out of Stock"),
#("preorder","Preorder"),
("userdisabled", "User Disabled"),
("disapproved", "Disapproved by admin"),
)
and the Field:
o_status = models.CharField(max_length=100, choices=PRODUCT_STATUS, verbose_name="Product Status", default="approved")
Suppose I wish to limit it to just "approved" and "userdisabled" instead showing the full array (which is what I want to show in the admin), how do I do it?
Thanks!
my form is
class MapForm(forms.ModelForm):
class Meta:
model = Map
fields = ('mapName', 'kmlStr')
and the view is :
map_form = MapForm(request.POST or None)
if map_form.is_valid():
map = map_form.save(commit=False)
map.mapName=map_form.mapName#is thie code right ?
how to get the mapName 's value , us 'map_form.mapName' ?
thanks
MYMESSAGE = "<div>Hello</div><p></p>Hello"
send_mail("testing",MYMESSAGE,"[email protected]",['[email protected]'],fail_silently=False)
However, this message doesn't get the HTML mime type when it is sent. In my outlook, I see the code...
Hi,
I have an application to count the number of access to an object for each website in a same database.
class SimpleHit(models.Model):
"""
Hit is the hit counter of a given object
"""
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
content_object = generic.GenericForeignKey('content_type', 'object_id')
site = models.ForeignKey(Site)
hits_total = models.PositiveIntegerField(default=0, blank=True)
[...]
class SimpleHitManager(models.Manager):
def get_query_set(self):
print self.model._meta.fields
qset = super(SimpleHitManager, self).get_query_set()
qset = qset.filter(hits__site=settings.SITE_ID)
return qset
class SimpleHitBase(models.Model):
hits = generic.GenericRelation(SimpleHit)
objects = SimpleHitManager()
_hits = None
def _db_get_hits(self, only=None):
if self._hits == None:
try:
self._hits = self.hits.get(site=settings.SITE_ID)
except SimpleHit.DoesNotExist:
self._hits = SimpleHit()
return self._hits
@property
def hits_total(self):
return self._db_get_hits().hits_total
[...]
class Meta:
abstract = True
And I have a model like:
class Model(SimpleHitBase):
name = models.CharField(max_length=255)
url = models.CharField(max_length=255)
rss = models.CharField(max_length=255)
creation = AutoNowAddDateTimeField()
update = AutoNowDateTimeField()
So, my problem is this one: when I call Model.objects.all(), I would like to have one request for the SQL (not two). In this case: one for Model in order to have information and one for the hits in order to have the counter (hits_total). This is because I cannot call directly hits.hits_total (due to SITE_ID?). I have tried select_related, but it seems to do not work...
Question:
- How can I add column automatically like (SELECT hits.hits_total, model.* FROM [...]) to the queryset?
- Or use a functional select_related with my models?
I want this model could be plugable on all other existing model.
Thank you,
Best regards.
Suppose I have my models set up already.
class books(models.Model):
title = models.CharField...
ISBN = models.Integer...
What if I want to add this column to my table?
user = models.ForeignKey(User, unique=True)
How would I write the raw SQL in my database so that this column works?
For formatting a date using date filter you must use the following format :
{{ my_date|date:"Y-m-d" }}
If you use strftime from the standard datetime, you have to use the following :
my_date.strftime("%Y-%m-%d")
So my question is ... isn't it ugly (I guess it is because of the % that is used also for tags, and therefore is escaped or something) ?
But that's not the main question ... I would like to use the same DATE_FORMAT parametrized in settings.py all over the project, but it therefore seems that I cannot ! Is there a work around (for example a filter that removes the % after the date has been formatted like {{ my_date|date|dream_filter }}, because if I just use DATE_FORMAT = "%Y-%m-%d" I got something like %2001-%6-%12)?
Suppose this is my URL route:
(r'^test/?$','hello.life.views.test'),
How do I make it so that people can do .json, .xml, and it would pass a variable to my views.test, so that I know to make json or xml?
I am trying to set up Google App Engine unit testing for my web application. I downloaded the file from here.
I followed the instructions in the readmen by copying the directory gaeunit into the directory with the rest of my apps and registering 'gaeunit' in settings.py. This didn't seem sufficient to actually get things going. I also stuck url('^test(.*)', include('gaeunit.urls')) into my urls.py file.
When I go to the url http://localhost:8000/test, I get the following error:
[Errno 2] No such file or directory: '../../gaeunit/test'
Any suggestions? I'm not sure what I've done wrong. Thanks!
I have this error:
'people' is an invalid keyword argument for this function
class Passage(models.Model):
name= models.CharField(max_length = 255)
who = models.ForeignKey(UserProfil)
class UserPassage(models.Model):
passage = models.ForeignKey(Passage)
people = models.ManyToManyField(UserProfil, null=True)
class UserProfil(models.Model):
user = models.OneToOneField(User)
name = models.CharField(max_length=50)
I try:
def join(request):
user = request.user
user_profil = UserProfil.objects.get(user=user)
passage = Passage.objects.get(id=2)
#line with error
up = UserPassage.objects.create(people= user_profil, passage=passage)
return render_to_response('thanks.html')
How to do correctly?
Thanks!
I'd like everything to function correctly, except when it's mobile, the entire site will used a set of specific templates.
Also, I'd like to autodetect if it's mobile. If so, then use that set of templates throughout the entire site.
I have a handful of users on a server. After updating the site, they don't see the new pages. Is there a way to globally force their browsers and providers to display the new page? Maybe from settings.py? I see there are decorators that look like they do this on a function level.
I am trying to get a list of all existing model fields and properties for a given object. Is there a clean way to instrospect an object so that I can get a dict of fields and properties.
class MyModel(Model)
url = models.TextField()
def _get_location(self):
return "%s/jobs/%d"%(url, self.id)
location = property(_get_location)
What I want is something that returns a dict that looks like this:
{
'id' : 1,
'url':'http://foo',
'location' : 'http://foo/jobs/1'
}
I can use model._meta.fields to get the model fields, but this doesn't give me things that are properties but not real DB fields.
pardon me as this is my first time attempting to write a init script for centos 5.
I am using django + supervisor to manage my celery workers, scheduler.
Now, this is my naive simple attempt /etc/init.d/supervisor
#!/bin/sh
#
# /etc/rc.d/init.d/supervisord
#
# Supervisor is a client/server system that
# allows its users to monitor and control a
# number of processes on UNIX-like operating
# systems.
#
# chkconfig: - 64 36
# description: Supervisor Server
# processname: supervisord
# Source init functions
/home/foo/virtualenv/property_env/bin/python /home/foo/bar/manage.py supervisor --daemonize
inside my supervisor.conf:
[program:celerybeat]
command=/home/property/virtualenv/property_env/bin/python manage.py celerybeat --loglevel=INFO --logfile=/home/property/property_buyer/logfiles/celerybeat.log
[program:celeryd]
command=/home/foo/virtualenv/property_env/bin/python manage.py celeryd --loglevel=DEBUG --logfile=/home/foo/bar/logfiles/celeryd.log --concurrency=1 -E
[program:celerycam]
command=/home/foo/virtualenv/property_env/bin/python manage.py celerycam
I couldn't get it to work.
2013-08-06 00:21:03,108 INFO exited: celerybeat (exit status 2; not expected)
2013-08-06 00:21:06,114 INFO spawned: 'celeryd' with pid 11772
2013-08-06 00:21:06,116 INFO spawned: 'celerycam' with pid 11773
2013-08-06 00:21:06,119 INFO spawned: 'celerybeat' with pid 11774
2013-08-06 00:21:06,146 INFO exited: celerycam (exit status 2; not expected)
2013-08-06 00:21:06,147 INFO gave up: celerycam entered FATAL state, too many start retries too quickly
2013-08-06 00:21:06,147 INFO exited: celeryd (exit status 2; not expected)
2013-08-06 00:21:06,152 INFO gave up: celeryd entered FATAL state, too many start retries too quickly
2013-08-06 00:21:06,152 INFO exited: celerybeat (exit status 2; not expected)
2013-08-06 00:21:07,153 INFO gave up: celerybeat entered FATAL state, too many start retries too quickly
I believe it is the init script, but please help me understand what is wrong.
Sometimes the best way to debug something is to print some stuff to the page, and exit(), how can I do this in a Python/Django site?
e.g. in PHP:
echo $var;
exit();
Thanks