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Are there ORMs for android that support many-to-many relationships? (self.android_dev)

submitted 2 months ago* (last edited 2 months ago) by tinkralge to c/android_dev

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I have no experience with android apps and just started working on one that needs to work with relational data. The relational data has multiple many-to-many relationships and the inbuilt ORM (Room) is leads to class explosion.

While looking at ORM libraries for android, there seem to be many that are out of date:

From 5 of the Best Android ORMs (2014) and AlexeyZatsepin/Android-ORM-benchmark (2017)

ORMLite: 3 years old and the M2M example makes me feel quite queasy
SugarORM: description explicitly only mentions 1:1, 1:n
GreenDAO is unmaintained but replaced by ObjectBox which I haven't yet looked at
Active Android: abandoned
Realm redirects to MongoDB 💀
Freezer: abandoned
DBFlow: no documentation and 3 seemingly abandoned
Requery: 4 years old (abandoned?). Actually my favorite in terms of API
Sprinkles: 10 years old, dead

I'm leaning towards Requery because I like its API the most (hides SQL the most), but haven't looked at ObjectBox yet.

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[–] [email protected] 2 points 2 months ago (1 children)

I have used ObjectBox in dart and it does support mtm relationships (you may need to define an intermediate model for the relationship. I can't remember off the top of my head). It worked great for me with only 1 or 2 gotchas that weren't well documented.

[–] tinkralge 1 points 1 month ago

Thanks. It does look like the right library to use. A little surprising that it seems to be the only one that's up to date, but at least it exists!