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store a list in a column using sqlalchemy
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# -*- coding: utf-8 -*- | |
import json | |
from sqlalchemy import Column, String, TypeDecorator | |
from sqlalchemy.ext.declarative import declarative_base | |
class Json(TypeDecorator): | |
impl = String | |
def process_bind_param(self, value, dialect): | |
return json.dumps(value) | |
def process_result_value(self, value, dialect): | |
return json.loads(value) | |
Base = declarative_base() | |
class Word(Base): | |
__tablename__ = "words" | |
eng = Column(String(32), primary_key=True) | |
chinese = Column(Json(128)) | |
def __repr__(self): | |
return "Word(%r, %r)" % (self.eng, self.chinese) | |
# connect to db; create tables, session maker | |
from sqlalchemy import create_engine | |
from sqlalchemy.orm import scoped_session, sessionmaker | |
engine = create_engine('sqlite://', echo=True) | |
Base.metadata.create_all(engine) | |
Session = scoped_session(sessionmaker(bind=engine, | |
autocommit=False, autoflush=False)) | |
# add word to db | |
## from .model import Session, Word | |
session = Session() | |
word = Word(eng='art', chinese=[u'艺术',u'美术']) | |
session.add(word) | |
session.commit() | |
# get word from db | |
session = Session() | |
word = session.query(Word).filter_by(eng='art').one() | |
print("\n".join(map(repr, [word, word.eng, word.chinese, word.chinese[0]]))) |
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# -*- coding: utf-8 -*- | |
from sqlalchemy import Column, Integer, ForeignKey, String | |
from sqlalchemy.ext.declarative import declarative_base | |
from sqlalchemy.orm import relationship | |
Base = declarative_base() | |
class Word(Base): | |
__tablename__ = "words" | |
id = Column(Integer, primary_key=True) | |
eng = Column(String(32), unique=True) | |
chinese = relationship("Chinese", backref="eng") | |
def __init__(self, eng, chinese): | |
self.eng = eng | |
self.chinese = map(Chinese, chinese) | |
def __repr__(self): | |
return "Word(%r, %r)" % (self.eng, [c.word for c in self.chinese]) | |
class Chinese(Base): | |
__tablename__ = "chinese_words" | |
word = Column(String(128), primary_key=True) | |
eng_id = Column(Integer, ForeignKey('words.id'), primary_key=True) | |
def __init__(self, word): | |
self.word = word | |
def __repr__(self): | |
return "Chinese(%r)" % (self.word,) | |
# connect to db; create tables, session maker | |
from sqlalchemy import create_engine | |
from sqlalchemy.orm import scoped_session, sessionmaker | |
engine = create_engine('sqlite://', echo=True) | |
Base.metadata.create_all(engine) | |
Session = scoped_session(sessionmaker(bind=engine, | |
autocommit=False, autoflush=False)) | |
# add word to db | |
## from .model import Session, Word | |
session = Session() | |
word = Word(eng='art', chinese=[u'艺术',u'美术']) | |
session.add(word) | |
session.commit() | |
# get word from db | |
session = Session() | |
word = session.query(Word).filter_by(eng='art').one() | |
print("\n".join(map(str, [word, word.eng, word.chinese, word.chinese[0].eng]))) |
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