I am making a model that generates 100 code automatically as a task
Django inspectdb command
Once you have set up the database connection in Django, you can auto-generate the models. Yes you heard it correctly! Django provides a utility to auto-generate models from an existing database via inspectdb command.
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Let's say that we have a Django app that looks on a legacy database.
If someone make changes on some database tables from a db client as DBeaver for example and not through Django models, is there a way to identify these changes?
You can do in a terminal, inside your Django project directory : python manage.py inspectdb > models.py
You will have models related to your tables.
By default, inspectdb creates unmanaged models. That is, managed = False in the model’s Meta class tells Django not to manage each table’s creation, modification, and deletion.
If you do want to allow Django to manage the table’s lifecycle, you’ll need to change the managed option above to True (or remove it because True is its default value).
I am working on already existing data on relational database. Now question is that how to build models and how to update the tables with new data coming from user (technically django forms)?
Django natively supports creating models for and working with existing data. From the documentation:
Integrating Django with a legacy database
Django will still need to create several of its own tables, but will adapt to use your existing tables. From the doc, you can auto-create models like this:
python manage.py inspectdb > models.py
You'll need to determine whether you want to manage updates to the table structure, but that's getting into details that will be specific to your project.
I would like to create DRF api.
In my case, I have already existing Django app.
I would like to add api to this existing app.
But I don't know how can I define DRF's models.
There is a using table in the existing app.
So, I run following command
python3 manage.py inspectdb
I think that I'll reuse those models, but I have a complicated custom user model.
How to create DRF app with already existing Django app ?
We have a Django application that has been in production since Django 1.1. Over the years, we've manually added bells and whistles to the production PostgreSQL db that weren't at the time overtly supported by Django's db automation, especially in the form of custom indexes.
Django's come a long way since 1.1, and now w/ 1.10 I'm pretty sure the migration framework supports all the custom features we've added manually. Is there any automated tool which will compare a database to the models, and generate migrations to bring the models up to date with the db?
This is built into django, you can just run inspectdb
manage.py inspectdb
Introspects the database tables in the database pointed-to by the NAME setting and outputs a Django model module (a models.py file) to standard output. You may choose what tables to inspect by passing their names as arguments.
Use this if you have a legacy database with which you’d like to use Django. The script will inspect the database and create a model for each table within it.
I want to generate SQL code and take from that code, generating a Django model to avoid errors.
They will say that you first create the model and run the syncdb or migrate but my case is unlike the database is already created and I now want the model
Run this command to auto-generate models from an already existing database. But first make sure you've properly linked database to django app .
python manage.py inspectdb > models.py
Do check models.py file and make some changes if you something isn't rendered correctly.
For inspectdb approach, read this: https://docs.djangoproject.com/en/1.8/howto/legacy-databases/
Alternatively, you can write all the models by yourself and set managed = False. No database table creation of deletion will be executed by Django on this model. But it is somewhat complicated and puts some limits on model relationships.
For managed=False approach, read this: https://docs.djangoproject.com/en/1.8/ref/models/options/#managed