Re: Looking for a code that separates fields while applying migrations

[Remy Lukoo Hangi]

Fais-moi le setup.exe de python django suis débutant

Le mardi 3 octobre 2023 à 06:41:12 UTC+2, Akash Sen a écrit :

> This one worked :   SQL: 
> https://github.com/django/django/blob/f4e72e6523e6968d9628dfbff914ab57dbf19e6b/django/db/models/fields/__init__.py#L142
>  .
> Thank you Adam.
>
> On Monday, October 2, 2023 at 3:44:34 PM UTC+5:30 Adam Johnson wrote:
>
>> See alte_field in the schema editor: 
>> https://github.com/django/django/blob/f4e72e6523e6968d9628dfbff914ab57dbf19e6b/django/db/backends/base/schema.py#L811
>>
>> It steps through what has changed in the field and generates SQL for the 
>> database relevant changes, queueing up statements with self.execute. Any 
>> non-SQL changes are basically ignored.
>>
>> Field.non_db_attrs tracks the field attributes rhat don’t affect SQL: 
>> https://github.com/django/django/blob/f4e72e6523e6968d9628dfbff914ab57dbf19e6b/django/db/models/fields/__init__.py#L142
>>  . 
>> Note they may be modified by field subclasses, such as inDjango-MySQL’s 
>> EnumField.
>>
>> On Sat, Sep 30, 2023, at 3:57 PM, Akash Sen wrote:
>>
>> Hello everyone,
>> There are certain attributes in a field, after changing these the 
>> migration generated willbe applied to database, (for example take 
>> foreignkey) like null=True or db_default=1. As they have something to do 
>> with the database column.
>> There are some other attributes after changing these the migration 
>> generated will not be applied to database, like on_delete. As currently 
>> they have nothing to do with the database column.
>> In search of the code that takes care of that. Some help would be great!
>>
>>
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>>  
>> 
>> .
>>
>>
>>

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Re: Looking for a code that separates fields while applying migrations

[Michiel Beijen]

On 28 Nov 2023, at 13:00, Remy Lukoo Hangi  wrote:
> 
> Fais-moi le setup.exe de python django suis débutant
> 

Hi Remy,

You found the developers email list for Django. Actually the email lists are 
not really used anymore, and you should use the ‘forums’ instead —> 
https://forum.djangoproject.com/c/users/6

However, there is no ‘setup.exe’ for Django, it does not really work that way. 
You’d be best off by reading the documentation here closely:
https://docs.djangoproject.com/en/4.2/intro/install/

Django is regarded as having good documentation and a comprehensive tutorial.

I hope this helps,

—
Michiel

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