Question 1

How to set up mst-gql with GraphQL subscriptions?

Accepted Answer

You need to create a WebSocket client using subscriptions-transport-ws and pass it as gqlWsClient when initializing the store. The README provides an example with SubscriptionClient and shows how to use the subscribe method for real-time data.

Question 2

mst-gql vs Apollo Client for React?

Accepted Answer

mst-gql is better if you're already using MobX-state-tree for reactive state management and want tight type integration. Apollo Client is more standalone with a larger ecosystem, but mst-gql offers better normalization and local state features out of the box.

Question 3

Can I use mst-gql without React?

Accepted Answer

Yes, by scaffolding with the --noReact flag, you can generate models without React utilities. However, features like hooks are React-specific, and the primary use case is with React applications.

Question 4

How to handle pagination in mst-gql?

Accepted Answer

Model paging state in the store or models by adding properties like offset and limit, and create actions to fetch more data. Examples in the twitter clone show this approach with sorted messages and load more functionality.

Question 5

Does mst-gql support TypeScript?

Accepted Answer

Yes, mst-gql has first-class TypeScript support. You can scaffold TypeScript models using the --format ts flag, and all generated code is fully typed with autocompletion.

Question 6

How to perform optimistic updates in mst-gql?

Accepted Answer

Pass an optimisticUpdate function as the third argument to mutations. This executes immediately, and MST records patches to roll back changes if the mutation fails, as described in the optimistic updates section.

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