feat(reducers): support reference data type

hello

Do you want to request a feature or report a bug?
feature

What is the current behavior? data type

db.collection("posts").doc("QyJJKtQhNA2QeHFVqfCR") = {
  content: String,
  author: Reference // 'users/jRjjlMyTBENjvln3pQpGwKgdvAa2'
}

query

{ collection: 'posts', doc: postId }

result

{ content: '', author: DocumentReference }

A DocumentReference refers to a document location in a Firestore database and can be used to write, read, or listen to the location. The document at the referenced location may or may not exist. A DocumentReference can also be used to create a CollectionReference to a subcollection.

What is the expected behavior?

{ content: '', author: { displayName: '', avatarUrl: '' } }

[sergeytsivin]

Once I have realized that populates parameter could be a function I have created a workaround:

const collection = 'todos';
const populates = (dataKey, originalData) => {
    if (originalData && originalData['owner'] && !originalData['ownerData']) {
        originalData['ownerData'] = originalData.owner.path.split('/')[1];
    }
    return [{child: 'ownerData', root: 'users'}]
};

const mapStateToProps = state => {
    return {
        uid: state.firebase.auth.uid,
        todos: populate(state.firestore, collection, populates)
    }
};
const enhancer = compose(
    firestoreConnect([{collection, populates}]),
    connect(mapStateToProps),
);

This code first extracts the user document ID from the owner attribute and then uses this ID to initialize a new ownerData attribute. Finally ownerData attribute is populated as usual.

[prescottprue]

@jollyBaker Not yet, but definitely high on the priority list.