Communication between stores in the same tree

[juanmavillarrazadb]

Hi every body, this is my first time with a discussion here and I'm an argentinian guy xD, my apologize for the spelling mistakes, so if you don't understand something or whatever just let me know...

With my work team (a great one) are building a defi trading multi-chain platform (awesome project) and we decided to choose MST for our application state within react and many others techs.

We push to standardize and design our state of the application based on the business logic, so imagine the following scenario (little approach of what we're looking for in many parts of the app).

The app has a root store, that contains 2 different store, one for the user state, and the other for the assets state. The user one only has simple data and an assetId that will be used to "populate" some sort of market information from the assets one, like for example the market price through a method called getById defined on it.

Our idea is to consume this information from the assets store inside the user one with Computed value, to achieve this we try three different ways to access a method from an other store, with getRoot, getParent or storing a safereference. And here is the main problem, we are not able to access the last node state of the assets store inside the user one, even when the assets mocked data has been loaded. So we don't know if doing this is a good practice, something possible with this tech or there is something I'm not seeing... We find a "solution" which I believe that is ninja fix and I don't feel comfortable using it, executing a getSnapshot(assets) inside the getter and forcing MST to get the last state of the node giving us the expected behavior.

I also try some others alternatives that you can check on the example repo. Here is the link of a simple code base that reproduce our actual problem in the app: https://github.com/juanmavillarraza/mst-issue

[EmilTholin]

Hi @juanmavillarrazadb!

What is the end goal you are trying to achieve with getById on the UserStore? Maybe that logic could be just on the AssetsStore instead?

[juanmavillarrazadb]

Hi @EmilTholin

As you said getById is a method from the AssetsStore check this line https://github.com/juanmavillarraza/mst-issue/blob/main/src/stores/assets.ts#L46

[juanmavillarrazadb]

Let me know if you have any doubt, also if you can reproduce the error in this lines https://github.com/juanmavillarraza/mst-issue/blob/main/src/components/pages/Home/Home.tsx#L12