Explore Firebase

[tenhobi]

Explore Firebase options, try to compare with new Firestore.

• explore Realtime Database
• explore Cloud Firestore
• determine what to use

[tenhobi]

I think we should use Cloud Firestore instead of Realtime Database. It's in a beta now, but it seems we can better structure data, do queries, it's better optimized for getting only data you need etc.

[tenhobi]

Both RD and CF are NoSQL databases, but RD returns whole JSON subtree on query and querying is quite bad if not possible. CF returns only the selected data, which is awesome to scaling up and you can do smart queries for your data.

Even though CF is in beta yet, we should give a try to it.

CF:

it can be used like this:

data:

{
  danceName: "My Dance",
  songs: {
    "aNameOfASong": true,
    "aNameOfAnotherSong": true,
  }
}

code:

db.collection('Dances')
  .where('songs.aNameOfASong', '==', true)
  .get()
  .then(function(querySnapshot) {
    querySnapshot.forEach(function(doc) {
      console.log(doc.id, " => ", doc.data());
    });
   })
   .catch(function(error) {
     console.log("Error getting documents: ", error);
    });

Also the rules for db looks better than for RD https://firebase.google.com/docs/firestore/security/get-started?authuser=0

It's free up to 1 GB stored and 10 GB / month downloaded, for our purposes that's enough.