#django

i am trying to write some tests for some models

it's a somewhat complicated model in that it creates geos Point fields

and i am getting some really strange behaviour in my tests

GDAL_ERROR 10: Pointer 'hDS' is NULL in 'GDALClose'.

and

Exception django.contrib.gis.gdal.error.GDALException: GDALException('Unknown error code: "79982160"',) in ignored

limbera: Sounds like broken data you feed in. GDAL is so picky.

without a line reference or anything - is there a way to make the output of the tests more verbose, so that i can diagnose this problem easier?

GDAL is C-library so there is no lines.

hooly dooly

mmm lame

limbera: So you need to verify that you don't feed broken geometries.

i'm passing in a well formed GPX file

and parsing over it

and creating Point() fields

Print those geoms while you're parsing it, eventually you should see what geom causes the crash.

well Points() and then creating PointFields from that

right

the code works in production, i'm just trying to write some tests

so i think the problem isn't necessarily with my file

and more with the way i'm setting up this test environmen

*environmeny

Oh, then - do you have same version of GDAL in both environments?

mmm i am not entirely sure

runserver locally, and uploading the file through my views etc.. works fine

but the python test ... results in those other errors

*but then

is it possibly to do with postgis in the test database?

If version differs, yes.

do i need to do anything to install it in a test env?

that should be handled by my migrations

Error you get refers to datasource...

So it looks like gdal is trying to close datasource that has null handle.

hmm i see

And that usually means that some code is trying to close GDAL datasource that failed to open (returned null (or None))

i see

that does make sense

let me do some debugging

strange, the problem seems to occur without any of my test code executing anyway

what i mean by that, is if i comment out my entire test file code, and try run the tests

it outputs this: GDAL_ERROR 10: Pointer 'hDS' is NULL in 'GDALClose'.

directly after "Creating test database for alias 'default'..."

it is failing during the db's creation

found it

-v 2

one of the migrations is failing

Really?

not sure if it fails, but when it runs it outputs this

Wonder what black magic happens there that causes crash...

this is my migration: https://dpaste.de/FMC8#L95,96,97,98,99,100

with the sections i believe are causing the error

I don't see any fishy there, so yo may want try to create minimal test case that does the same thing and see if it crashes as well.

It could be a bug.

im gonna make a new db and just try run migrations manually

outside of test db

see what happens

yep

error

same error's that is

strange, i think this must be related to django 1.10

unsure though

o/

Hello. If I have a class in models.py called Thing(models.Model) and it has a function: def Function(self): is it then possible to use Thing.objects and then iterate over it?

I am trying to do so in the shell, but It is not possible ofr some reason. Can not iterate over a Manager..

For example: I created an object with my class, I then want to count how many of those objects from that class I have. I want to do this with a function the class already has, and thus the objects. How do I do this??

Stragler: you can't iterate over a manager, only a resultset

so it's Thing.objects.all()

or Thing.objects.filter(filters…)

hm queryset*…

So how can I count the objects then?

Stragler: https://docs.djangoproject.com/en/1.10/ref/mode...

I triet Thing.objects.all.count()

did not work

yes, pls read that link

the example

Entry.objects.count() doesnt work either

do you have a model "Entry"?

i thought you had "Thing" ?

Thing

I jsut copy pasted example

but I tried it

doesnt work

why would you copy n paste the example?

django.db.utils.OperationalError: no such table: WebApp_trip

i dunno kids these days want to program everything by copy n paste ;)

Noooooo, I did Thing.objects.count()

that's not what you just said

it did not work. I just copy pasted the example in order to tell you I also tried that compination, without the all()

Sorry for the confusion

ok so "no such table" means you haven't migrated, usually

at this point i feel i should ask the old "Have you done the tutorial?" question

I am doing this shit in the shell

Hello, I have a django app in which i want to take users' xml link of blogs and from that display latest entries on my blog page. Any ideas, Help!!

Do I have to migrade everytime I make a change, even in the shell?

Stragler: please refrain from cursing, if you want help

ok

Stragler: so you need to migrate every time you make a change to a model

Can I do this in the shell?

and "no such table" means that migrate has never been run for the app that has that model

Or do I need to exit the shell every single time?

Yeah I know. I just wanna play around without having to make the db yet

Thats what the shell was for, I thought

yeah you can't define models in the shell, unfortunately

well you can, but they won't "work"

as they need a db backing them