Hi, I’m thinking of building an api using Phoenix Framework for the mobile app, the front end will be written in dart, with the help of flutter framework.
The communication between server and client will be made with Phoenix channels.
I wanted to ask how well does the Pow library play for such cases, it seems more geared to web apps usage, what does is take to make it work for mobile apps backends, did anyone use it similar way, is there a manual, tutorial or github repo to quickly look at the code?
A little example here would be nice too.
igor
dorgan
igor
Thanks, doorgan, I’ve updated my comment, I ment to use Phoenix channels to make connection to the server, does this page cover this case?
danschultzer
Pow Core Team
I know there are many who have implemented Pow in mobile apps using e.g. Phoenix Channels. The way you need to implement it depends on your particular auth story though.
I do plan eventually to write some documentation for it, but for now there’s this gigantic issue dealing with Phoenix LiveView in particular: Instructions for WebSocket usage (e.g. Phoenix Channels and LiveView) · Issue #271 · pow-auth/pow · GitHub
There’s also an older issue that might be of interest to you: [Question / feature request] API only support & Phoenix channels · Issue #153 · pow-auth/pow · GitHub
But in short; you can use the API guide that @dorgan linked to create & authenticate the user. Then you can use the auth token to authorize access in your user socket, which would be almost the same as the logic you see in fetch/2 of the API auth plug.
igor
Thanks a lot, @danschultzer, I’ll dive straight into this!
And yes, I think most common usecases, such as authentication for html app, rest api (aka json api), websocket connections (channels, LiveView, etc) all need to have implementation examples in the docs, I see this is already the case for html and api usage.
Exadra37
Can Pow support also Mnesia for the other parts where Ecto is used for persistence?
I ma asking because I am building a project using only Mnesia as the database.
danschultzer
Pow Core Team
Yeah, but it depends how you wish to handle distribution.
You may want to run the MnesiaCache on a separate node, or use a custom MnesiaCache module, since MnesiaCache would override local data with what is in the cluster when joining. You can find more in the docs here: Pow.Store.Backend.MnesiaCache — Pow v1.0.19
Exadra37
I think you misunderstood my question or I am misunderstanding your reply and linked docs.
In my understating Mnesia is used by Pow to persist sessions, and what I am asking is if Pow supports to use Mnesia also to persist the created users, aka when you register for the fist time, because I don’t see this mention anywhere, not even in the linked docs, but I may had misunderstood something.
By the way congrats for the awesome work you have done with Pow 
outlog
afaik Pow uses ecto - so you can try using patatoid / ecto3_mnesia · GitLab - you would need to replicate the Pow ecto migrations into a script creating the db tables as per the ecto3_mnesia readme..
!