dataReducer doesn't merge previous data on LISTENER_RESPONSE action.

[unsouled]

What is the current behavior?
dataReducer doesn't merge previous data on LISTENER_RESPONSE action.

What is the expected behavior?
dataReducer should merge previous data on LISTENER_RESPONSE action when previous data is exist and meta does not have subcollections

Which version of redux-firestore are you using? What about other dependencies?
0.13.0

This commit(bab3aa5) breaks the action.

If intended, the above conditional code(

redux-firestore/src/reducers/dataReducer.js

Line 53 in d7a5613

if (!previousData || meta.subcollections) {

) is meaningless code.

[prescottprue]

Thanks for reporting. Feel free to make a PR if you get a chance. Otherwise, I'll get to it when I can

[jake-nz]

I think #218 means that the example given under Query Options for "or style queries" (with 'sally', 'john', 'peter') no longer works. I'm running into trouble trying to load different data from the same collection where the second query replaces the data from the first.

Maybe we could use something like mergeOrdered for mergeData instead?

[giovannidavi]

I have created a PR to revert the changes and add merged data back
#324

[prescottprue]

We might have to be careful here - merging logic was removed in the past since it caused an issue with params being removed from documents (from another client or server) after data has already been loaded on the current client. Maybe I'm misunderstanding, but just want to make sure we handle this case before moving forward since that test that was changed is in place for a reason

[giovannidavi]

Hey @prescottprue
I was not aware of a related issue with the merge functionality,
But is it intended to totally remove merging functionality to resolve that bug? is there any other way to keep the merge functionality while and resolve the removing issue?