Does Django detect changes in models Meta ?

[termopro]

Hi there,

I am using Django 1.7 RC2.
I have created models and have run all the migrations so Django created tables in database.
Now i decided to change database table names and have added Meta class to models containing table name:

class SomeModel(models.Model):
   ...
   class Meta:
      db_table = 'newname'

Now when i run "makemigrations" Django doesn't detect any changes in models:
"No changes detected in app 'blabla'."
As far as i understand the logic, Django should change table names from 'appname_somemodel" to "newname".

Is this an expected behavior or i am missing something?

[Norman Bird]

I am new, just completed the tutorials, but from my understanding you run "python manage.py syncdb" and that rebuilds the tables etc.  

[Néstor]

is that true if the table is already there?

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[Norman Bird]

I believe so. Wont hurt to try it and see what happens.

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Thank You,

Norman Bird
Principal Web Development Consultant
DatabaseInDays.com
(703) 986-7157

[Larry Martell]

On Fri, Aug 22, 2014 at 9:55 AM, Norman Bird <steelp...@gmail.com> wrote:
> I am new, just completed the tutorials, but from my understanding you run
> "python manage.py syncdb" and that rebuilds the tables etc.

No, syncdb only create tables that do not exist. It does not alter any
existing tables.

[Norman Bird]

I stand corrected. :-) 

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[Norman Bird]

how about: python manage.py sql myapp 

I just changed my model and I had to runt that in order to build the tables. 

[David Los]

Very, very good question. I am experiencing the same issues with Django 1.7rc2 and 1.7rc3.

Syncdb and sql statements are intended for Django < 1.7.

Would love to hear a solution!

Op vrijdag 22 augustus 2014 09:32:43 UTC+2 schreef termopro:

[Malik Rumi]

Django 1.7rc2 here. Same question, same hope for an answer. It may be that not all possible changes to a model are intended to be picked up. For example, I created all my models directly in 1.7rc2, and I have not changed any fields. What I have done is changed / added some meta and methods. Maybe these changes don't 'count'? 

Your models will be scanned and compared to the versions currently contained in your migration files, and then a new set of migrations will be written out. Make sure to read the output to see what makemigrations thinks you have changed - it’s not perfect, and for complex changes it might not be detecting what you expect.

and

Migrations are Django’s way of propagating changes you make to your models (adding a field, deleting a model, etc.)

 So it might be that unless you change something that actually hits the database, there won't be anything to migrate, and that makes sense, but it would be nice if someone with expertise, experience, and inside knowledge could confirm and explain that. 

[Michael A. Martin]

Maybe Migrations is just really buggy? I am using PostgreSQL as the backend. I added a column with a default value and then did makemigrations then migrate. It doesn't work. I get a very long error.

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[Malik Rumi]

>>Maybe Migrations is just really buggy? I am using PostgreSQL as the backend. I added a column with a default value and then did makemigrations then migrate. It doesn't work. I get a very long error<<

hmmmm...... I hope not. I'm using Postgres too. Looks like I'll have to add a new field to my models tonight when I get off work from the day job. I'll let you know what happens.

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