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From Pat Ferrel <...@occamsmachete.com>
Subject Re: Deleting / Reversing events in the event server
Date Thu, 27 Jul 2017 17:39:05 GMT
Blacklisting items in the query happens at query time, events sent to the EventServer will
take effect only after the next training time. So item blacklists seems to be the right approach
for your issue.


On Jul 26, 2017, at 11:52 PM, Mattz <eatingkappa@gmail.com> wrote:

Yes, I think that's what I will do. Thanks for the help!

On Thu, Jul 27, 2017 at 11:31 AM, Vaghawan Ojha <vaghawan781@gmail.com <mailto:vaghawan781@gmail.com>>
wrote:
Yes Mattz, that's why I pointed that, it's more easy and effective I think. You could just
save the blocked items somewhere that may be even in your relational database in which your
original application resides, and update them accordingly, and using them while querying.
Or else you can save them in eventserver as a user properties and retrive them while querying.
Both way it should be of help. 

Thanks
Vaghawan

On Thu, Jul 27, 2017 at 11:44 AM, Mattz <eatingkappa@gmail.com <mailto:eatingkappa@gmail.com>>
wrote:
Thanks Vaghawan. I think using the "blacklistItems" might be better for my use case rather
than passing in the "block" events. I didn't think of this. 

On Thu, Jul 27, 2017 at 11:15 AM, Vaghawan Ojha <vaghawan781@gmail.com <mailto:vaghawan781@gmail.com>>
wrote:
So you're not sending the blocklisted items in query like this right?

"blacklistItems": ["itemId1", "itemId2", ...]

So, you have those blocked events, then you must be able to update them accordingly just the
way you set them as blocked. Or else I'm still not clear (I'm sorry in that case). 

Thanks
Vaghawan

On Thu, Jul 27, 2017 at 11:26 AM, Mattz <eatingkappa@gmail.com <mailto:eatingkappa@gmail.com>>
wrote:
This is how I am using now. I send a blocked event if a user blocks an item. So, when recommending
items for the user, this item does not show up. I am using the "universal recommender" template.


On Thu, Jul 27, 2017 at 11:09 AM, Vaghawan Ojha <vaghawan781@gmail.com <mailto:vaghawan781@gmail.com>>
wrote:
Oh Yes Mattz, I seems to have misunderstood your situation. I thought that you were having
that blocked prop as a properties or something. My thought must have been totally wrong. 

I'm not clear if you're sending the blocked items in query or something else? Also which template
you have been using? 

Thanks



On Thu, Jul 27, 2017 at 11:19 AM, Mattz <eatingkappa@gmail.com <mailto:eatingkappa@gmail.com>>
wrote:
Thanks Vaghawan. "$set" and "$unset" are used to set/unset item properties right? Since these
are not like the other events, these items would still be returned unless I manually find
all the things blocked and filter from list to get my result set. But, if I send "blocked"
as a regular event, PIO automatically filters out items that were blocked by the user. 

On Thu, Jul 27, 2017 at 10:59 AM, Vaghawan Ojha <vaghawan781@gmail.com <mailto:vaghawan781@gmail.com>>
wrote:
Hi Mattz,

You could just use $set, $unset to achieve this. When user wish to unblock the item, just
send in another request in the event server to update the event. This would solve your problem
from as much as I know from using pio eventserver. 

you could find the examples here. https://predictionio.incubator.apache.org/datacollection/eventmodel/
<https://predictionio.incubator.apache.org/datacollection/eventmodel/>

Thanks
Vaghawan

On Thu, Jul 27, 2017 at 11:09 AM, Mattz <eatingkappa@gmail.com <mailto:eatingkappa@gmail.com>>
wrote:
Hello,

I have a use case where I am sending a "blocked" event for a user for a particular item. When
this happens, PIO eliminates this item from the result set. But, the user can choose to "unblock"
this item at a later time. I am wondering how to handle this. Should I somehow delete the
event from the even server? If yes, how? Is there any other way to solve this?

Thanks!










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