open-law/app/models/book_version.py

46 lines
1.4 KiB
Python

from datetime import datetime
from app import db
from app.models.utils import BaseModel
class BookVersion(BaseModel):
__tablename__ = "book_versions"
# need to redeclare id to use it in the derivative relationship
id = db.Column(db.Integer, primary_key=True)
semver = db.Column(db.String(16), unique=False, nullable=False)
is_active = db.Column(db.Boolean, default=False)
updated_at = db.Column(db.DateTime, default=datetime.now)
# Foreign keys
derivative_id = db.Column(db.Integer, db.ForeignKey("book_versions.id"))
book_id = db.Column(db.Integer, db.ForeignKey("books.id"))
user_id = db.Column(db.ForeignKey("users.id"))
# Relationships
user = db.relationship("User", viewonly=True)
book = db.relationship("Book", viewonly=True)
derivative = db.relationship("BookVersion", remote_side=[id])
sections = db.relationship("Section", viewonly=True, order_by="desc(Section.id)")
collections = db.relationship(
"Collection", viewonly=True, order_by="desc(Collection.id)"
)
def __repr__(self):
return f"<{self.id}: {self.semver}>"
@property
def root_collection(self):
for collection in self.collections:
if collection.is_root:
return collection
@property
def children_collections(self):
return [
collection
for collection in self.root_collection.children
if not collection.is_deleted
]