#django

How fair ye' cobba

moldy: mmm because the db schema could go back and forth in history with migrations, but the python model would stay at the new version, lacking that column

mcspud: hi :p

moldy: and I see the django.db.migrations.state.StateApps instance returns a fake model, this is the model you just talked about, the one "historically right"

;)

yes, i think so

is that correct?

ok

i never really digged under the hood of migrations, but this is my understanding of the high-level concept

yes that is correct

so in my case the manager is correct, the issue is I cannot call methods of the fake model since only fields are built

A migration typically means changing the database state

anddam - yep, I move everything to management commands and run them there

either that, or if you have to call a method, turn it into a function and copy / paste it into your migration file

anddam - if the command should only be run once I inspect `django_migrations` and use it as a history log so I cant run it again

YMMV though

mcspud: wouldn't you have the same historical correctness issue?

No

mcspud: how so?

I mean the issue about using a model that doesn't reflect a db schema is still there, even with commands

oh, now it makes sense https://docs.djangoproject.com/en/1.11/topics/m...

I'm trying to create a user and upload a file which is handled by a userprofile model in the same view. I have a create user modelform and a fileupload modelform which are shown in the same view. The user profile has a onetoone field to a user and when I try to register the user, either I can't get the file to upload or I get an Integrity error because when I am saving the upload form the profile does not

have a user. Any tips on how to solve this? I need to be able to create the user and upload the file in the same view.

Coffie: You have only one html for right ?

form*

Lauxley: yes

Coffie: have the user form save method return the user (i think it should already) and pass it to the save method of the profile ?

Lauxley: I have been able to create the profile by doing that, but the file is not uploaded or added to the model

Lauxley: it might be my uploadform that's worng, I only have the profile as the model for the form and the only field is the filefield

s/worng/wrong/

Coffie: show the code (i will leave soon but somebody will probably help you if you show the view code)

Coffie: do you pass request.FILES to the form ?

Lauxley: yes to the file upload form i pass both request.POST and request.FILES, and to the user creation form I pass only request.POST

Lauxley: https://pastebin.com/vyZrBVnt

HyP3r: I'm also working with modbus so hey o/

Hi, I have a general question about django. The apps are supposed to allow for decoupled functionality (?). When creating my apps I have trouble separating functionality from looks. One issue I am facing is this: My app defines views that I use. The templates those should be rendered to however extend my base.html template which results in a cyclic dependency. Is there a way to avoid this?

Another example is navigation: This needs to be hardcoded in the base template but depends on the urlconf which is used.

Schrostfutz: where do you have the cyclic dependency? i don't understand

while using pylint within Visual Studio Code I get annoying messages like E1101:Class 'User' has no 'DoesNotExist' member

tell pylint to ignore that error

and E1101:Instance of 'User' has no 'service_set' member

static linters can't be perfect with dynamic languages like python

ok, but why isn't pylint finding the class attributes?

probably because they are generated dynamically

oh I didn't know pylint was a static linter, I thought it tried and import stuff

so I guess I don't really need to use pylint from the virtualenv as I did

it might import stuff, dunno. but some things may happen even after import time

ok, I asked as I figured there was something well known (to other people, that is) about DoesNotExist and the like

I like how he asks Meta class to have more public methods as well

I'll check pylint-django package

moldy: My app defines some views and should be rendered to some template. If I want that template to use the same look-and-feel as my main application, I extend the base template I use. This introduces a cyclic dependency.

The main application uses the apps urls and that way its views, the app uses the base's templates

Schrostfutz: i don't see a cyclic dependency here

{% extends "base.html" %} is not a dependency on your project

it only depends on *some* base.html existing, it doesn't care which one or where it's coming from

moldy: Well, not explicitly, but it depends on the naming convention of the base template and its blocks. Is there a common way they should be named?

Schrostfutz: base.html is common

moldy: And block names?

I usually have base.html and app/base.html so my apps can rewire blocks as needed

for blocks, "content" is pretty common

also, remember that your project can override app templates

Hey guys, what would be the best way to override a django class method ? For example I want to rewrite the models.Field base class, more exactly the cached_col property or the get_col method. I don't want it to cache that for a one of my models.

this way even if base.html has block mycontent app/base.html can transfer that to content as needed

xbogdan: not supported

some people hold the opinion that reuseable apps should not ship templates at all, or only minimal example templates

(because more often than not, the project ends up overriding the template anyway)

apollo13: i guess i can make my own class that inherits from the Field class and only overrides that desired column

but then I have to make a class for each type of field

xbogdan: well, it is cached for a reason and also not public api

moldy: Okay, I see. What about styling of e.g. form elements? The approaches I have seen to adapt e.g. classes of the generated forms use an adapted ModelForm. Is there a way to do this from the project?

so even if you manage to override you probably might break more stuff

Guys, I have a problem that I do not know how to solve - though I cant imagine why it would be so diffucult.

I have a html page with custom forms (using mptt tags)

and I want to connect that page to a view

So use my own form, with my own fields

but I cant get the values to the view

xbogdan: and the real question would be: what are you trying to achieve

apollo13: I'm trying to implement a transparent way for a model to use a partionned postgresql table, see here my stackoverflow question: https://stackoverflow.com/questions/45354503/po...

xbogdan: doesn't postgresql do that transparently nowadays?