On 04/11/2017 02:37 AM, shrey.chau...@invicto.in wrote:
Yes Mike will do that, mostly its marshmallow model schema which is
creating the object, as I am using Flask + marshmallow for APIs,
p.groups=[] //when i try to empty it, i get this exception
*AssertionError: Collection was loaded during event handling.
*//though the action is getting performed,
putting a try catch is solving it, but why is it coming?
that error happens means there is an append() or remove() event handler,
or alternatively a @validates hook for that attribute (which is the same
thing), which is running probably in the context of a backref being set;
when the backref is being set, p.groups is not yet loaded. when the
handler runs, it is doing something that is causing p.groups to be
lazy-loaded from the database, rather than just operating upon the
incoming values. this is confusing the attribute system with state it
doesn't expect. as always, stack trace will tell a lot more here.
though,
g.packages=[] this is working fine with no exception
Thanks for any kind of help, in advance
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