Use of itertools.count to generate record ids in Recipe

[formacube]

Hi,

itertools.count does not seem to be working in recipe or in a direct make statement

when I declare:

import itertools as it
baker.make('Play',  puzzle_id=it.count(start=1), _quantity=7)

or
fake_play = Recipe(Play, puzzle_id=it.count(start=1))

I expected puzzle_id to take incremental values 1,2,3, ... 7

Instead, I receive an error message:

TypeError: int() argument must be a string, a bytes-like object or a number, not 'itertools.count'

I have tried different things but I don't really see what is happening as itertools.cycle is working well.

There seem to be nothing on the internet about it, not on the documentation. So I would assume it normally works

Could you help me out?

Versions

Python:Python 3.7.4
Django: 2.2.7
Model Bakery:1.0.2

[berinhard]

Hi @formacube, thanks for your issue. Did you tried to use sequences instead? You can use it as:

from model_bakery.recipes import seq
fake_play = Recipe(Play, puzzle_id=seq(1))

This is the correct way to bakery's recipes with iterables.

[formacube]

you are right !
I lost more than one hour for nothing.

I only used seq so far as part of a string.
I didn't realized it could also be used for other variable types.

Thanks a lot Berinhard

[berinhard]

You're welcome! I'm glad model bakery is being useful for you =)

[formacube]

model bakery is extremely useful !

for the record: from model_bakery.recipe

however, I receive now the following error when using seq:

TypeError: int() argument must be a string, a bytes-like object or a number, not 'itertools._tee'

My goal is to fill-in the id number corresponding to a foreign key:

class Play(models.Model): puzzle = models.ForeignKey( Puzzle, on_delete=models.CASCADE, related_name='plays')

Have you ever performed that ?
Is it working for you ?
or how should I do that?

[formacube]

Hi Bernardo,

By applying your proposition, I found out it is not working.
I defined my question a bit better, but as I'm not able to re-open the issue, I'm not sure you are alerted.

[berinhard]

@formacube I'm preparing myself for Brazil's PyCon (we call it Python Brasil) which will begin next monday. Because of that I'm with a lot of stuff in my plate now, but as soon as things calm down I'll revisit this issue. Probably this will happen during python brasil's sprints days.

[berinhard]

Anyway, I reopened this issue so I won't forget to read it again =)

[formacube]

Thanks a lot, and have a nice event