Hello guys,
I have this table:
class Channel(rdb.Model):
rdb.metadata(metadata)
rdb.tablename("channels")
id = Column("id", Integer, primary_key=True)
title = Column("title", String(100))
hash = Column("hash", String(50))
runtime = Column("runtime", Float)
items = relationship(MediaItem, secondary="channel_items",
order_by=MediaItem.position, backref="channels")
I have a list of channels, but they are detached objects. I get them
using joinedload option because I maniputale those objects sometimes.
When I do that, I update the object.
This time, I'm trying to add a new item to a detached channel object.
This is the code:
def insertXML(channels, strXml):
"""Insert a new channel given XML string"""
channel = Channel()
session = rdb.Session()
result = ""
channel.fromXML(strXml)
fillChannelTemplate(channel, channels)
if channel.id == 0:
session.add(channel)
session.flush()
channels.append(channel)
else:
for chan in channels:
if chan.id == channel.id:
chan.runtime = channel.runtime
chan.modified = datetime.date.today()
for item in channel.items:
if item.id == 0:
chan.items.append(item)
session.merge(chan)
The item is inserted in the database, but It doesn't create the
relation in channel_items.
Besides, I get this error:
FlushError: New instance <Channel at 0xb75eeec> with identity key
(<class 'zeppelinlib.channel.ChannelTest.Channel'>, (152,)) conflicts
with persistent instance <Channel at 0xb598dec
This is a problem because the need to update the channel in both sides
(sever and database), so if I get the error that object is not updated
in server too.
Any idea?
Thanks in advance!
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