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git-subtree-dir: spiffworkflow-backend git-subtree-split: 50f28073add91265f00826bd175c8b2fff76cdc5
31 lines
904 B
Python
31 lines
904 B
Python
"""Principal."""
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from dataclasses import dataclass
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from flask_bpmn.models.db import db
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from flask_bpmn.models.db import SpiffworkflowBaseDBModel
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from sqlalchemy import ForeignKey
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from sqlalchemy.schema import CheckConstraint
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from spiffworkflow_backend.models.group import GroupModel
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from spiffworkflow_backend.models.user import UserModel
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class DataValidityError(Exception):
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"""DataValidityError."""
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class MissingPrincipalError(DataValidityError):
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"""MissingPrincipalError."""
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@dataclass
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class PrincipalModel(SpiffworkflowBaseDBModel):
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"""PrincipalModel."""
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__tablename__ = "principal"
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__table_args__ = (CheckConstraint("NOT(user_id IS NULL AND group_id IS NULL)"),)
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id = db.Column(db.Integer, primary_key=True)
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user_id = db.Column(ForeignKey(UserModel.id), nullable=True, unique=True)
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group_id = db.Column(ForeignKey(GroupModel.id), nullable=True, unique=True)
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