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<pre><code>association_table = Table("association_table",
Base.metadata,
Column("show_id", Integer(), ForeignKey("show_times.id"), primary_key=True),
Column("theater_id", Integer(), ForeignKey("theaters.id")))
association_table2 = Table("association_table2",
Base.metadata,
Column("show_id", Integer(), ForeignKey("show_times.id"), primary_key=True),
Column("movie_id", Integer(), ForeignKey("movies.id")))
class Movie(Base):
__tablename__ = "movies"
id = Column(Integer, primary_key=True)
title = Column(String(), unique=True)
plot = Column(String())
duration = Column(String())
rating = Column(String())
trailer = Column(String())
imdb = Column(String())
poster = Column(String())
summary = Column(String())
class Theater(Base):
__tablename__ = "theaters"
id = Column(Integer, primary_key=True)
zip_code = Column(String())
city = Column(String())
state = Column(String())
address = Column(String())
phone_number = Column(String())
class Showtime(Base):
__tablename__ = "show_times"
id = Column(Integer, primary_key=True)
date = Column(Date())
theaterz = relationship("Theater", secondary=association_table)
moviez = relationship("Movie", secondary=association_table2)
showtimes = Column(String())
</code></pre>
<p>假设我们有电影对象:</p>
<pre><code>movie_1 = Movie(title="Cap Murica",
plot="Cap punches his way to freedom",
duration="2 hours")
movie_2 = Movie(title="Cap Murica 22222",
plot="Cap punches his way to freedom again",
duration="2 hours")
</code></pre>
<p>和一个剧院物体:</p>
<pre><code>theater = Theater(name="Regal Cinemas",
zip_code="00000",
city="Houston",
state="TX")
</code></pre>
<p>如何将其大容量保存到<code>show_times</code>模型中</p>
<p>我试过这样做:</p>
<pre><code>movies = [movie_1, movie_2] # these movie objects are from the code snippet above
show_times = Showtime(date="5/19/2016",
theaterz=[theater],
moviez=movies)
session.add(show_times)
session.commit()
</code></pre>
<p>万岁以上的作品。但是当我像这样大量地做的时候:</p>
<pre><code>showtime_lists = [show_time1, show_time2, showtime3] # these are basically just the same show time objects as above
session.bulk_save_objects(showtime_lists)
session.commit()
</code></pre>
<p>它不会失败,但数据也不会持久化到数据库中</p>
<p>我的意思是,除了将每个<code>show_time</code>单独添加到会话中,还有其他选择吗?大容量插入会更好,但我不明白如果这样做,为什么数据不能持久化</p>