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Archiving model data in Django


Archiving model data in Django

By : Pooja Agarwal
Date : November 22 2020, 10:38 AM
To fix the issue you can do In your code data from ArchivedModel will stay in OriginalModel SQL table. At SQL level ArchivedModel will be a table with single id field referencing to OriginalModel table. So if you will add objects to ArchivedModel in post_save signal they will be duplicated in OriginalModel :-)
You need to create abstract base class and inherit both "real" models from it:
code :
class AbstractModel(models.Model):
    ...
    field = models.CharField(etc...)
    ...
    class Meta:
        abstract = True

class OriginalModel(AbstractModel):
    pass

class ArchivedModel(AbstractModel):
    pass


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SQL Server - best replication model for archiving

SQL Server - best replication model for archiving


By : user3286900
Date : March 29 2020, 07:55 AM
I wish this helpful for you For #1, I'd say test it out and see. MS typically has a couple of whitepapers saying that pull subscriptions are more performant, but I don't recall them saying what it costs in terms of resources. If you're worried about it, set up a remote distributor (remote = not the same server as the publisher)
For #2, there are a couple of ways to do it. When you set up the article with sp_addarticle, there's a parameter @del_cmd which can take a value of "none". This will tell the distribution agent to no-op deletes at the subscriber. You could also do your purging with a stored procedure, set up the execution of the stored procedure as an article in replication and then have a stored procedure at the subscriber that does nothing. Each approach has its pros and cons.
Django entries archiving

Django entries archiving


By : Anonymous
Date : March 29 2020, 07:55 AM
To fix this issue Just create another table in the database, and move messages there. For example:
Run CREATE TABLE emails_archive LIKE emails; in MySQL.
code :
INSERT INTO emails_archive (SELECT * FROM emails WHERE sent_at < DATE_SUB(NOW(), 1 MONTH));
DELETE FROM emails WHERE sent_at < DATE_SUB(NOW(), 1 MONTH));
Archiving Django models

Archiving Django models


By : user7402775
Date : March 29 2020, 07:55 AM
Does that help So, after looking into this long and hard, I think the best solution for me is to create a 'flat' version of the object, dereferencing any existing objects, and save that in the database.
The reason for this is that my 'BoxOrder' object can change every week (as the customer edits their address, item, cost etc. Keeping track of all these changes is just plain difficult. Plus, I don't need to do anything with the data other than display it to the sites users.
Archiving data in Django like a magic?

Archiving data in Django like a magic?


By : Man Chun Li
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I would solve this problem with Abstract Model Inheritance.
This will allow you to write logic for one class and set of fields and it will apply to all child classes.
code :
class IsActive(models.Model):
    class Meta:
        abstract = True
    is_active = models.BooleanField(default=False)

    def toggle_active(self):
        self.is_active = !self.is_active

class Child(IsActive):
    # This object now has `is_active` and `toggle_active` fields.
In django How to display parent model data with child model data in change list view?

In django How to display parent model data with child model data in change list view?


By : Nikhil Samant
Date : March 29 2020, 07:55 AM
Does that help Example: I have an Invoice as the parent model and invoice details as the child model. I would like to display the child details in the Invoice model admin as entries of the invoice. Target is to achieve a consolidated view in the listing page itself. Is there any alternative to achieve this: It should look like this: , Assume the following example:
models.py
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