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from peewee import *
from playhouse.fields import CompressedField
from playhouse.hybrid import *
import datetime
from .prefixes import query_pseudo_prefix
db = SqliteDatabase('test.db', pragmas=[('foreign_keys', 'ON')])
__tables__ = []
__all__ = ['create_tables', 'drop_tables']
def table(cls):
__tables__.append(cls)
__all__.append(cls.__name__)
return cls
def create_tables():
db.create_tables(__tables__, True)
def drop_tables():
db.drop_tables(__tables__, True)
class BaseModel(Model):
class Meta:
database = db
@table
class Document(BaseModel):
content = CompressedField()
created = DateField(default=datetime.datetime.now)
description = CharField(null=True)
direction = BooleanField(null=True)
original_path = CharField(null=True)
inserted = DateTimeField(default=datetime.datetime.now)
@classmethod
def matches(cls, prefix, value):
return query_pseudo_prefix(prefix, value) or Document.id << (
DocumentTag.select(DocumentTag.document)
.join(Tag, on=Tag.matches(prefix, value)))
@table
class Prefix(BaseModel):
name = CharField(primary_key = True)
builtin = BooleanField(default = False)
pseudo = BooleanField(default = False)
description = CharField(null=True)
def __str__ (self):
return self.name
@table
class Tag(BaseModel):
name = CharField()
prefix = ForeignKeyField(Prefix, null=True, related_name = 'tag', db_column = 'prefix')
description = CharField(null=True)
@hybrid_method
def matches(self, prefix, name):
return (self.prefix == prefix) & (self.name == name)
class Meta:
indexes = [
(('name', 'prefix'), True)
]
def __str__(self):
prefix = self.prefix.name + ':' if self.prefix else ''
description = ' -- ' + self.description if self.description else ''
return prefix + self.name + description
@table
class DocumentTag(BaseModel):
document = ForeignKeyField(Document, related_name = 'tags')
tag = ForeignKeyField(Tag)
class Meta:
primary_key = CompositeKey('document', 'tag')
@table
class TagImplications(BaseModel):
tag = ForeignKeyField(Tag)
implies_tag = ForeignKeyField(Tag, related_name = 'implications')
class Meta:
primary_key = CompositeKey('tag', 'implies_tag')
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