plain.models 0.39.2

Database models for Plain.

plain.models

Model your data and store it in a database.

# app/users/models.py
from plain import models
from plain.passwords.models import PasswordField


@models.register_model
class User(models.Model):
    email = models.EmailField()
    password = PasswordField()
    is_admin = models.BooleanField(default=False)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.email

Every model automatically includes an id field which serves as the primary key. The name id is reserved and can't be used for other fields.

Create, update, and delete instances of your models:

from .models import User


# Create a new user
user = User.objects.create(
    email="[e-mail]",
    password="password",
)

# Update a user
user.email = "[e-mail]"
user.save()

# Delete a user
user.delete()

# Query for users
admin_users = User.objects.filter(is_admin=True)

Installation

Install plain.models from PyPI, then add it to your INSTALLED_PACKAGES.

# app/settings.py
INSTALLED_PACKAGES = [
    ...
    "plain.models",
]

To connect to a database, you can provide a DATABASE_URL environment variable.

DATABASE_URL=postgresql://user:password@localhost:5432/dbname

Or you can manually define the DATABASE setting.

# app/settings.py
DATABASE = {
    "ENGINE": "plain.models.backends.postgresql",
    "NAME": "dbname",
    "USER": "user",
    "PASSWORD": "password",
    "HOST": "localhost",
    "PORT": "5432",
}

Multiple backends are supported, including Postgres, MySQL, and SQLite.

Querying

TODO

Migrations

TODO

Fields

TODO

Validation

TODO

Indexes and constraints

TODO

Managers

TODO

Forms

TODO

Sharing fields across models

To share common fields across multiple models, use Python classes as mixins. The final, registered model must inherit directly from models.Model and the mixins should not.

from plain import models


# Regular Python class for shared fields
class TimestampedMixin:
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)


# Models inherit from the mixin AND models.Model
@models.register_model
class User(TimestampedMixin, models.Model):
    email = models.EmailField()
    password = PasswordField()
    is_admin = models.BooleanField(default=False)


@models.register_model
class Note(TimestampedMixin, models.Model):
    content = models.TextField(max_length=1024)
    liked = models.BooleanField(default=False)