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63 lines
1.6 KiB
Python
63 lines
1.6 KiB
Python
"""Database classes and models."""
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from pypistats.extensions import db
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Column = db.Column
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basestring = (str, bytes)
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class CRUDMixin(object):
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"""Mixin that adds convenience methods for CRUD operations."""
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@classmethod
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def create(cls, **kwargs):
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"""Create a new record and save it the database."""
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instance = cls(**kwargs)
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return instance.save()
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def update(self, commit=True, **kwargs):
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"""Update specific fields of a record."""
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for attr, value in kwargs.items():
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setattr(self, attr, value)
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return commit and self.save() or self
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def save(self, commit=True):
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"""Save the record."""
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db.session.add(self)
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if commit:
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db.session.commit()
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return self
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def delete(self, commit=True):
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"""Remove the record from the database."""
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db.session.delete(self)
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return commit and db.session.commit()
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class Model(CRUDMixin, db.Model):
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"""Base model class that includes CRUD convenience methods."""
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__abstract__ = True
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class SurrogatePK(object):
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"""A mixin that adds a surrogate integer 'primary key' column.
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Adds a surrogate integer 'primary key' column named ``id`` to any
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declarative-mapped class.
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"""
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__table_args__ = {'extend_existing': True}
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id = Column(db.Integer, primary_key=True)
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@classmethod
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def get_by_id(cls, record_id):
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"""Get record by ID."""
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if any(
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(isinstance(record_id, basestring) and record_id.isdigit(),
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isinstance(record_id, (int, float))),
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):
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return cls.query.get(int(record_id))
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return None
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