Hi Serge, thank you for your reply.
I'm working on an environmental monitoring app, where I want to store, and serve, monitoring value on different geometries, points, tracks or polygon. That's why I'm trying to use a polymorphic model in order to have one entity and multiple geometries. Cheers L On Friday, February 5, 2016 at 10:51:31 AM UTC+1, Sergiy Khohlov wrote: > > I would like as simple question : Are you planning to have some > advantages using this abstract class ? > I’m working on similar product (look like you are making energy > pipeline system based on postgis and gjango). My product is GTS system > which includes POINTS (datas are received via GTS devices mounted on > vehicles). Polylines (car route for selected time range), etc. Producing > abstract class can decrease DB productivity. Which one functional do you > need in case of abstract class for different types usage ? > > Many thanks, > > Serge > > > +380 636150445 > skype: skhohlov > > On Fri, Feb 5, 2016 at 11:07 AM, Luca Moiana <luca....@gmail.com > <javascript:>> wrote: > >> Hi Collin, >> >> Sorry for the late reply, but I still don't get the google groups; >> >> Yes, I am tryng to crete a models where you can choose between the three >> geometry types. >> >> I'll go back to my app and test the code you suggested and post again the >> error. >> >> thanks >> >> >> On Wednesday, October 28, 2015 at 7:00:26 PM UTC+1, Collin Anderson wrote: >>> >>> Hello, >>> >>> Are you trying to combine multiple models into one, like this? >>> >>> class PolyModel(pdmpunto, pdmtransetto, pdmarea): >>> pass >>> >>> You could also try asking on the geodjango list: >>> http://groups.google.com/group/geodjango >>> >>> Collin >>> >>> On Monday, October 26, 2015 at 7:18:24 AM UTC-4, Luca Moiana wrote: >>>> >>>> Hi, working on my first django app, and run into a problem. >>>> >>>> I tend to create geodjango objects, and add all data from external >>>> tables with pk. >>>> >>>> Then I want to have different geometries 8points, lines, polygons) into >>>> a unique polymorphic class, can I do that? >>>> >>>> I have an error that I'll document later, and I'm trying to figure out >>>> what to do. >>>> >>>> Here is the model: >>>> import datetime >>>> >>>> from django.db import models >>>> from django.contrib.gis.db import models as geomodels >>>> from django.utils import timezone >>>> from django.forms import ModelForm >>>> from polymorphic import PolymorphicModel >>>> >>>> # Geometria linea da monitorare >>>> class geolinea(geomodels.Model): >>>> progetto = models.CharField(max_length=14, primary_key=True) >>>> geom = geomodels.MultiLineStringField() >>>> objects = geomodels.GeoManager() >>>> def __str__(self): >>>> return '%s' % (self.progetto) >>>> # Oggetto Progetto soggetto a PMA >>>> class linea(models.Model): >>>> progetto = models.ForeignKey(geolinea) >>>> nome = models.CharField(max_length=200) >>>> TENSIONE = ( >>>> ('132', '132kV'), >>>> ('150', '150kV'), >>>> ('220', '220kV'), >>>> ('380', '380kV'), >>>> ) >>>> tensione = models.CharField(max_length=5, >>>> choices=TENSIONE) >>>> def __str__(self): >>>> return '%s' % (self.nome) >>>> >>>> # Geometria dei pdm >>>> class pdmpunto(geomodels.Model): >>>> linea = models.ForeignKey(linea) >>>> numero = models.CharField(max_length=3) >>>> geom = geomodels.PointField() >>>> objects = geomodels.GeoManager() >>>> >>>> class pdmtransetto(geomodels.Model): >>>> linea = models.ForeignKey(linea) >>>> numero = models.CharField(max_length=3) >>>> geom = geomodels.LineStringField() >>>> objects = geomodels.GeoManager() >>>> >>>> class pdmarea(geomodels.Model): >>>> linea = models.ForeignKey(linea) >>>> numero = models.CharField(max_length=3) >>>> geom = geomodels.PolygonField() >>>> objects = geomodels.GeoManager() >>>> >>>> class pdm(PolymorphicModel): >>>> numero = models.CharField(max_length=14, primary_key=True) >>>> class punto(pdm): >>>> rifpunto = models.ForeignKey(pdmpunto) >>>> class transetto(pdm): >>>> riftransetto = models.ForeignKey(pdmtransetto) >>>> class area(pdm): >>>> rifarea = models.ForeignKey(pdmarea) >>>> >>>> >>>> >>>> -- >> You received this message because you are subscribed to the Google Groups >> "Django users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to django-users...@googlegroups.com <javascript:>. >> To post to this group, send email to django...@googlegroups.com >> <javascript:>. >> Visit this group at https://groups.google.com/group/django-users. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/django-users/cd243d25-0aff-446d-b9c9-cb5682d9bdf3%40googlegroups.com >> >> <https://groups.google.com/d/msgid/django-users/cd243d25-0aff-446d-b9c9-cb5682d9bdf3%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "Django users" group. 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