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Introducing Realm React Native (realm.io)
70 points by porsager on Feb 22, 2016 | hide | past | web | favorite | 16 comments

I think this is a very exciting match for both eco systems. I look forward to seeing where it will go.

Congrats to the team. We've been really happy trying it out. It's a drop-in replacement for the standard flux pattern.

What about PhoneGap? Seems weird to support React Native but not PhoneGap.

Hi, Tim from Realm here. We actually rely on a custom C++ core, which means we have to support each JavaScript engine separately. We completed support for JavaScriptCore first, which React Native uses on both iOS & Android. To support PhoneGap / Cordova we’d need to support V8, which will be close to as much work as supporting JSC in the first place. We’re looking forward to getting it done though! https://github.com/realm/realm-js/issues/261 Beyond that we were quite excited about the architectural decisions behind React Native and the emerging community around it, so we figured it’d be a good place to start that lined up very well with our own goals!

If you are interested in React Native and Couchbase Lite, here's a tutorial for Android [1] and notes for iOS [2]

[1] http://blog.couchbase.com/2015/november/getting-started-with...

[2] https://gist.github.com/jchris/3c32524577deff3d69aa

Awesome news, thanks for showing support for RN!

It's too bad that Realm's core technology isn't open source, it would be interesting to see what other immutable databases (e.g. Datomic) would do with the ideas they've come up with. Also grafting Datascript onto Realm for a datalog competitor to sqlite would be sweet.

Does anyone know the actual queries that are used in the benchmark comparison?

There’s a link in the caption to the code: https://github.com/realm/realm-js/tree/master/examples/React...

Is this usable with electron / nodewebkit apps ?

Not out of the box at the moment. But it would technically be possible to do. Feel free to post a suggestion to https://github.com/realm/realm-js/issues so we can see the interest.

can it be used as a simple key/value store?

Patrick from Realm here. Realm _can_ be used as a key-value store using our primary keys but at the moment it does expect a fixed schema (all of the keys can be optional though). It’d be trivial for us to relax that requirement and we do have dynamic APIs that allows this on Swift/Objective-C/Java. That said, there’s a lot more Realm can do that a K/V store can’t such as query efficiently on arbitrary properties, link objects in a graph, and more. Does that answer your question?

Yes -- is there a doc about the graph semantics?

You can add any object as a property of another object, and access them via dot notation: https://realm.io/docs/react-native/latest/#object-properties

You can probably find some more advanced examples in our Swift docs https://realm.io/docs/swift/latest/#relationships

We’re barely scratching the surface of this in our query language, which is heavily NSPredicate-inspired, but we might add more OpenCypher-ish features in the future. (And we’d greatly appreciate concrete use-cases or anything else you can share in a GitHub issue to help us prioritize development) https://github.com/realm/realm-js/issues

Sounds interesting!

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