I think there's other ways to do that, but maybe. We've got the
IConfigureMarten hook to do composite configuration. One thing we could do is something like AddMarten(blah blah blah).AddProjection<MyProjectionType>(lifetime), and the second chained call adds an IConfigureMarten to the container, which could pull MyProjectionType out of the container.
Still, for some cases like custom Iprojection, it’s valid scenario
I can add it
On a semi-related note, there's some low hanging fruit soon to create some slight alternatives to
IProjection for custom things where you just let users get a page of events at a time, or maybe expose a single ApplyEvent() method so you don't have the goofy "take a page, group it by stream, immediately turn it back into the original page of events" dance we do internally for custom projections
Like to do that before we add your Subscription stuff directly to Marten
One gotcha for future reference, ef core's autotransactions need to be disabled (can be done per connection basis)
I've implemented full text search, and am busy running some tests. Here is a sample of two entries in the database:
[
{
"id": "M02.02",
"code": "M02.02",
"description": "ARTHROPATHY FOLLOWING INTESTINAL BYPASS UPPER ARM"
},
{
"id": "M02.03",
"code": "M02.03",
"description": "ARTHROPATHY FOLLOWING INTESTINAL BYPASS FOREARM"
}
]
I have a scenario in which the test input is "intestinal bypass arm", and using PhraseSearch, PlainTextSearch and WebStyleSearch all return only the first record. How do I need to structure my index (or my code) in order to get both records for the given search term?
btw, it's worth mentioning that NgramSearch returns both records, but it takes over 6 seconds to do so.
For example,
.Duplicate(x => x.Description)
.NgramIndex(x => x.Description)
ps: I contributed the feature so you have specific questions or issues with it, please @ me.
I did add docs as well a while ago, https://martendb.io/documents/full-text.html#partial-text-search-in-a-multi-word-text-ngram-search
See if we need to add any further info to the docs. May be an expanded example to add clarity(?).
I attempted to search
partial text search in the search box and it did not list the section on ngram index. So looks to be an issue with the Algolia search indexing, will take a look.
@mysticmind I did see that article, and implemented that approach, which resulted in the response taking 6s as indicated in my original post on this topic. Implementing the .NgramIndex(x=> x.Description) as mentioned by @apereriratl resulted in the response taking 6ms. This was, however, undocumented (or I missed the documentation on it).
1 reply
I fixed the Algolia search config, the search is showing up fine now
Hi all! I've been exploring Marten for a project I'm working on and so far it seems very promising. We're using event sourcing and DDD aggregates and some of the events created should also be made available as DDD-style "Domain Events". I would like to be able to have other aggregates inside the same bounded context to react to these events. Furthermore, some of them should be written to external message system so that other services can react to them. So far I've been thinking about adding an asyncronous projection that just publishes all events through MediatR and then we could have handlers that do stuff on those events. However it does seem a bit complicated so I thought it would be nice to know if anyone else has done similar things with Marten and how did you solve them.
Hi Arto, if you don't mind using Jasper, check Jeremy's post: https://jeremydmiller.com/2022/06/16/building-a-more-useful-outbox-for-reliable-messaging/
If you'd like to have it handled on your own, you can use your own outbox as custom
IProjection that I presented here: https://event-driven.io/en/integrating_Marten/
I'm not using MediatR, as I'm doing more magic around tracing, retry policies etc. but you can do the same with MediatR id you'd like to.
Thanks for the quick reply guys! I think that both Jasper and Oskar's approach seem promising and trying out Jasper has been on my todo-list for a while. I'll try out both and see how it turns out. I have no particular need to use MediatR either, I think that with these I might actually be able to boot it from the project.
There will be a new Jasper alpha this week, but it's all focused on better error handling and robustness. Next Marten feature release will have subscriptions, then back to Jasper to support that there. The goal being having Jasper + Marten support for both publishing some subset of the events captured in Marten immediately through Jasper's outbox or being able to publish Marten events with a strong ordering guarantee through Jasper
Conservatively let's say within 2 weeks
It's probably the last time to do that, but as I know some of people are already using the approach I described, so the one in Marten will be (probably) conceptually similar
Of course, Jasper approach is more ready, as I see Jeremy's putting lots of effort on Jasper, so in the long term it may be worth considering it :)
Query, We have a project with only inline projections and thus we don't run the async daemon outside of rebuilds. In one of our newer environments with a small number of events we ran into a problem yesterday whereby the high water mark only updated mid-rebuild which caused some problems later down the line.
I assume the rebuild process was built with the idea that the daemon has always been previously running and thus no at-least-once detection of the high water mark occurs?
I think i've managed to reproduce an issue with inline projections halting at gaps, I've thrown this PR up for review/discussion:
JasperFx/marten#2313
JasperFx/marten#2313
jeez, going back to a conversation we were having on the 26th July, where'd that time go?
hi all 👋 going through the docs I noticed Marten doesn't support
Intersect Linq operator. Is there any alternative way to achieve this functionality? I'm trying to check if two arrays intersect in Marten query.
4 replies