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  • Django - Problem with models/manager to organise a query...

    - by user296644
    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.

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  • Django database - how to add this column in raw SQL.

    - by alex
    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?

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  • Django date filter: how come the format used is different from the one in datetime library?

    - by sebpiq
    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)?

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  • How do I set up gaeunit 2.0a with my Django app?

    - by J. Frankenstein
    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!

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  • Django. Invalid keyword argument for this function. ManyToMany

    - by sagem_tetra
    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!

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  • how can i introspect properties and model fields in django?

    - by shreddd
    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.

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  • webapp and django framework

    - by Joel
    As far as I understand, the "Getting Started" guide of GAE with Python uses the webapp framework. However, it seems like it uses Django to render templates. Does that mean that I can use the Django template engine without using its application framework?

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  • Should custom data elements be stored as XML or database entries?

    - by meteorainer
    There are a ton of questions like this, but they are mostly very generalized, so I'd like to get some views on my specific usage. General: I'm building a new project on my own in Django. It's focus will be on small businesses. I'd like to make it somewhat customizble for my clients so they can add to their customer/invoice/employee/whatever items. My models would reflect boilerplate items that all ModelX might have. For example: first name last name email address ... Then my user's would be able to add fields for whatever data they might like. I'm still in design phase and am building this myself, so I've got some options. Working on... Right now the 'extra items' models have a FK to the generic model (Customer and CustomerDataPoints for example). All values in the extra data points are stored as char and will be coerced/parced into their actual format at view building. In this build the user could theoretically add whatever values they want, group them in sets and generally access them at will from the views relavent to that model. Pros: Low storage overhead, very extensible, searchable Cons: More sql joins My other option is to use some type of markup, or key-value pairing stored directly onto the boilerplate models. This coul essentially just be any low-overhead method weather XML or literal strings. The view and form generated from the stored data would be taking control of validation and reoganizing on updates. Then it would just dump the data back in as a char/blob/whatever. Something like: <datapoint type='char' value='something' required='true' /> <datapoint type='date' value='01/01/2001' required='false' /> ... Pros: No joins needed, Updates for validation and views are decoupled from data Cons: Much higher storage overhead, limited capacity to search on extra content So my question is: If you didn't live in the contraints impose by your company what method would you use? Why? What benefits or pitfalls do you see down the road for me as a small business trying to help other small businesses? Just to clarify, I am not asking about custom UI elements, those I can handle with forms and template snippets. I'm asking primarily about data storage and retreival of non standardized data relative to a boilerplate model.

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  • Apache2 Modpython : IOError: Write failed, client closed connection.

    - by llazzaro
    This is the error : [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] mod_python (pid=9528, interpreter='realpage.com', phase='PythonHandler', handler='django.core.handlers.modpython'): Application error [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] ServerName: 'realpage.dom' [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] DocumentRoot: '/htdocs' [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] URI: '/' [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] Location: '/' [Mon Mar 01 12:19:50 2010] [error] [client XXX.XX.248.60] Directory: None [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] Filename: '/htdocs' [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] PathInfo: '/' [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] Traceback (most recent call last): [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] File "/usr/lib/python2.5/site-packages/mod_python/importer.py", line 1537, in HandlerDispatch\n default=default_handler, arg=req, silent=hlist.silent) [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] File "/usr/lib/python2.5/site-packages/mod_python/importer.py", line 1229, in _process_target\n result = _execute_target(config, req, object, arg) [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] File "/usr/lib/python2.5/site-packages/mod_python/importer.py", line 1128, in _execute_target\n result = object(arg) [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] File "/usr/lib/python2.5/site-packages/django/core/handlers/modpython.py", line 228, in handler\n return ModPythonHandler()(req) [Mon Mar 01 12:19:50 2010] [error] [client XXX.XXX.248.60] File "/usr/lib/python2.5/site-packages/django/core/handlers/modpython.py", line 220, in call\n req.write(chunk) [Mon Mar 01 12:19:50 2010] [error] [client XXX.XX.248.60] IOError: Write failed, client closed connection. Please! I am sure you need more information in order to find the bug, please tell me what and how to get it. The error is throwing every time!

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  • nginx not serving admin static files?

    - by toto_tico
    First, I want to clarify that this error is just for the admin static files. This means my problem is specific just to the static files that corresponds to the Django admin. The rest of the static files are working perfect. Basically my problem is that for some reason I cannot access those admin static files with the ngix server. It works perfect with the micro server of Django and the collect static is doing its job. This means it is putting the files on the expected place in the static folder. The urls are correct but I cannot even access the admin static files directly, but the others I can. So, for example, I am able to access this url (copying it in the browser): myserver.com:8080/static/css/base/base.css but i am not able to access this other url (copying it in the browser): myserver.com:8080/static/admin/css/admin.css I also tried to copy the admin/ directory structure into other_admin_directory_name/. Then I can access myserver.com:8080/static/other_admin_directory_name/css/admin.css Then, it works. So, I checked permissions and everything is fine. I tried to change ADMIN_MEDIA_PREFIX = '/static/admin/' to ADMIN_MEDIA_PREFIX = '/static/other_admin_directory_name/', it doesn't work. This a mistery in itself that I am exploring but still no luck. Finally, and it seems to be an important clue: I tried to copy the admin/ directory structure into admin_and_then_any_suffix/. Then I cannot access myserver.com:8080/static/admin_and_then_any_suffix//css/admin.css So, if the name of the directory starts with admin (for example administration or admin2) it doesn't work. * added thanks to sarnold observation ** the problem seems to be in the nginx configuration file /etc/nginx/sites-available/mysite location /static/admin { alias /home/vl3/.virtualenvs/vl3/lib/python2.7/site-packages/django/contrib/admin/media/; }

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  • Celery daemon as a Ubuntu service does not consume tasks while running from terminal does

    - by Guy
    On Ubuntu 11.10, I have to issue python tasks from django using celery. I'm currently testing on the same machine but eventually the celery worker should run on a remote machine. django uses the following settings: BROKER_HOST = "127.0.0.1" BROKER_PORT = 5672 BROKER_VHOST = "/my_vhost" BROKER_USER = "celery" BROKER_PASSWORD = "celery" I can also see my task queued in http://localhost:55672/#/queues the celery daemon uses the following configuration (celeryconfig.py): BROKER_HOST = "127.0.0.1" BROKER_PORT = 5672 BROKER_USER = "celery" BROKER_PASSWORD = "celery" BROKER_VHOST = "/my_vhost" CELERY_RESULT_BACKEND = "amqp" import os import sys sys.path.append(os.getcwd()) CELERY_IMPORTS = ("tasks", ) running celeryd -l info works well and now I want to run it as a service. I've followed the instructions from http://ask.github.com/celery/cookbook/daemonizing.html and now I'm trying to run it using: sudo /etc/init.d/celeryd start But the message is not being consumed, no error in the celery log either. /etc/default/celeryd CELERYD_NODES="w1" CELERYD_CHDIR="/path/to/django/project" CELERYD_OPTS="--time-limit=300 --concurrency=1" CELERY_CONFIG_MODULE="celeryconfig" # %n will be replaced with the nodename. CELERYD_LOG_FILE="/var/log/celery/%n.log" CELERYD_PID_FILE="/var/run/celery/%n.pid" # Workers should run as an unprivileged user. CELERYD_USER="celery" CELERYD_GROUP="celery" I've also created user celery in Ubuntu not sure if its necessary. Any help will be appreciated, Thanks, Guy

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  • MySQL Not Turning On

    - by Shalin Shah
    I have an amazon ec2 instance running on the Amazon Linux AMI and its a micro instance. I wanted to install Django onto my server so I entered these commands wget http://www.mlsite.net/blog/wp-content/uploads/2008/11/go wget http://www.mlsite.net/blog/wp-content/uploads/2008/11/django.conf chmod 744 go ./go So after I was done, I ran sudo service httpd restart and sudo service mysqld restart and This is what came up for mysqld: Stopping mysqld: [ OK ] MySQL Daemon failed to start. Starting mysqld: [FAILED] So I deleted the django files /usr/local/python2.6.8/site-packages/django_registration.egg and I tried finding the error and I found out that in my /etc/my.cnf for the socket, it said socket=/var/lock/subsys/mysql.sock so I went to /var/lock/subsys/ and there was no mysql.sock. I tried creating one using vim but it still didn't work. Then I checked the error log and it said Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) So I am pretty much lost right now. I know it has something to do with mysql.sock If you might know a reason why this was caused could you please let me know? I have a wordpress site on my server, so i kind of need MySQL to work. Thanks!

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  • how do i write an init script for django-supervisor

    - by amateur
    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.

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  • Server performance worsened after a hardware upgrade: how should I reconfigure the server?

    - by twick
    I'm running a site on an Ubuntu/Apache/Django/PostgreSQL stack. We upgraded our server recently from 1 processor with 2 Gb total RAM (with 0.5 Gb of that RAM assigned to memcached) to a new server that has 2 processors with 4 Gb total RAM (with 2 Gb of that RAM assigned to memcached). However, when I looked at Google Webmaster Tools, I found out that the average page speed has worsened from 5 seconds to 15 seconds. Why would performance get worse with a hardware upgrade? What should I check and tune? Is this more likely to be a problem with memcached, Apache, Django, or PostgreSQL?

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  • Installing GeoIP on Mac?

    - by Richard
    I want to install the MaxMind GeoIP C library, so that I can use GeoIP as part of Django. I'm working on MacOS. I've downloaded GeoIP-1.4.8.tar.gz from here and run: ./configure make make check make install without any problems. I've also downloaded GeoIP.dat.gz and GeoLiteCity.dat.gz, unzipped them and put them in a local directory. Then I've set the following paths in my settings.py: GEOIP_PATH = 'path_to_dat_files' GEOIP_LIBRARY_PATH = 'path_to_c_files' Now I'm trying to run python manage.py migrate (which has a reference to GeoIP in a project I'm using), but I'm still getting this error: from django.contrib.gis.utils import GeoIP ImportError: cannot import name GeoIP Any ideas? Thanks.

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  • Why would the 'show processlist' command speed up normally slow requests to my remote DB? (connected via VPN)

    - by Hakan B.
    I am running a local Django development server that connects to a remote MySQL server via a VPN (IPSec). Request times are awfully slow and I consistently see timeouts. Attempting to diagnose the problem, I logged in to the remote database and ran: show full processlist Immediately, the local server went from idle to working. The page had not yet completely loaded, but progress had been made (debug logs confirm this). When I ran 'show full processlist' several times more in succession, the request completed quickly. I can currently reproduce this - unless I run 'show full processlist' over and over on the remote server, my local request usually times out. Does anyone have any idea why this would happen? I'm running Django 1.3 and OS X 10.7. Note: I realize this may be entirely not be a question with a clear-cut answer and is probably my fault, but it is odd and reproducable, so I hope someone can at least point me the right direction. Thanks in advance.

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  • Amazon EC2: Not able to open web application even if port it opened

    - by learner
    I have a t1.micro instance with public dns looks similar to ec2-184-72-67-202.compute-1.amazonaws.com (some numbers changed) On this machine, I am running a django app $ sudo python manage.py runserver --settings=vlists.settings.dev Validating models... 0 errors found Django version 1.4.1, using settings 'vlists.settings.dev' Development server is running at http://127.0.0.1:8000/ I have opened the port 8000 through AWS console Now when I hit the following in Chrome http://ec2-184-72-67-202.compute-1.amazonaws.com:8000, I get Oops! Google Chrome could not connect to WHat is that I am doing wrong?

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