Show HN: Realm for Android

Re:Show HN: Realm for Android by jc4p on Tuesday September 30, 2014 @01:48PM (#8389724)

Just as a heads up your documentation doesn't work with the newest version of the Android Gradle plugin (0.13.0), see here: http://stackoverflow.com/a/25939518/472021

the `android-apt` dependency needs to be switched to 1.4 else you get:

    A problem occurred configuring project ':cachetest'.
    > No such property: projectDependencies for class: com.android.build.gradle.internal.api.ApplicationVariantImpl_Decorated

Edit #1: Is there any way to instantiate my RealmObject from JSON? I'm currently using GSON to take API calls <--> POJOs, I can't figure out any way to do this using Realm since models "must be instantiated from the Realm using the realm.createObject() instance method".

Edit #2: Okay I have no idea how to use this. Given a list of `Object`, how do I make a `RealmList` of it? Do I have to use Realm.createObject? Is there not any way of just taking a couple already instantiated versions of an object and jamming them into a `RealmList`?

I was really excited about trying this out (the Stack Exchange app currently has a 37ms delay on a cold start to get the list of all of our sites back into active memory) but this does not look like it's going to be easy to use.

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Re:Show HN: Realm for Android by timanglade on Tuesday September 30, 2014 @02:21PM (#8390018)

Thanks for the heads-up! We’ll get that fixed shortly.

We do support JSON (and GSON) — you can see it at work in our gridViewExample (https://github.com/realm/realm-java/tree/master/examples/gri...)

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Re:Show HN: Realm for Android by jc4p on Tuesday September 30, 2014 @02:25PM (#8390069)

Eek so I actually have to make/use a setter for every single attribute of my models? That's definitely a deal breaker for me.

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Re:Show HN: Realm for Android by timanglade on Tuesday September 30, 2014 @02:29PM (#8390111)

We’re still exploring ways to let people use public properties instead, but that’s one of the things that is hard to do without copying (and paying the huge performance price associated with it).

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Re:Show HN: Realm for Android by tburch on Tuesday September 30, 2014 @05:26PM (#8391366)

try using http://projectlombok.org/

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Re:Show HN: Realm for Android by greyskull on Tuesday September 30, 2014 @05:43PM (#8391477)

That's neat. I'll have to keep that in mind for the future.

I wish Java would take a hint from C# properties through :(

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Re:Show HN: Realm for Android by timanglade on Tuesday September 30, 2014 @02:28PM (#8390096)

This is good feedback — we definitely expect to be polishing the API quite a bit in the weeks to come, just like we did on iOS>

You have to use Realm.createObject because objects are strongly tied to one Realm at a time. We could introduce standalone objects you can create with regular constructors but you’d be a really heft performance hit there.

RealmLists are mostly used to model relationships at this point, so you could add them to a another model like (http://realm.io/docs/java/0.70.1/#relationships) although eventually we do want to introduce standalone RealmLists.

What would you expect to use multiple RealmObjects in a single RealmList for? (Just so we can learn from your use-case.)

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Re:Show HN: Realm for Android by jc4p on Tuesday September 30, 2014 @02:38PM (#8390194)

I was trying to add in a Realm test to a benchmarking project I already have set up to see how quickly I can retrieve a list of Stack Exchange sites from disk/db/etc, the Site model is laid out here: https://api.stackexchange.com/docs/types/site -- each Site object can have anywhere from 0 to N related_site objects, which in my current model I just have as a RelatedSite[], since my test case is running all the different ways to cache/read at the same time I was trying to make a method in my RealmObject version of Site that takes in a regular Site object and transforms everything over, but I couldn't figure out how to translate the RelatedSite[] array into a RealmList<RelatedSite> without actually iterating through every one and recreating them by hand.

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Re:Show HN: Realm for Android by emanuelez on Tuesday September 30, 2014 @03:36PM (#8390624)

Thank you for bringing the subject up! Importing data from JSON in a painless way is very high on the priority list. Right now we don't have an elegant solution for your specific use-case, but we're working on it so stay tuned! Please feel free to join us in the mailing list as we would love to hear more about your project and help with it if possible!

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Re:Show HN: Realm for Android by emanuelez on Tuesday September 30, 2014 @02:27PM (#8390089)

Thanks for the heads up! We will address that right away.

Also, one of the examples (GridViewExample) in the release reads JSON data with GSON.

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