SolidJS•2mo ago

Create one global store with multiple createResource

Hello, I am a beginner programmer developing a small local app with Tauri and SolidStart. In the past, I have already worked on a personal website with Nuxt/Vue/Pinia. The data being exclusively stored on a local sqlite database, I am trying to load all the data from the start of the program execution, and intend to make it available to all components from a store. How do I initialize my store within context with createResource ? my context is undefined I've made sure the data fetching part works. I tried to wrap the AppContext.Provider with Suspense, my guess being the async is messing things up here. Thank you

export type AppContextType = {
  store: Store<any>;
  setStore: SetStoreFunction<any>;
};

const AppContext = createContext<AppContextType>();

async function fetchDbData<T>(query: string) {
  const db = await Database.load("sqlite:mydatabase.db");
  return await db.select<T[]>(query);
}

const categories = createResource(async () =>
  fetchDbData<Category>("SELECT * FROM category;"),
)[0]();

const items = createResource(async () =>
  fetchDbData<Item>("SELECT * FROM item;"),
)[0]();

export const AppProvider: Component<any> = (props: any) => {
  // function createDeepSignal<T>(value: T): Signal<T> {
  //   const [store, setStore] = createStore({
  //     value,
  //   });
  //   return [
  //     () => store.value,
  //     (v: T) => {
  //       const unwrapped = unwrap(store.value);
  //       typeof v === "function" && (v = v(unwrapped));
  //       setStore("value", reconcile(v));
  //       return store.value;
  //     },
  //   ] as Signal<T>;
  // }

  const [store, setStore] = createStore(
    {
      categories,
      items
    });
  return (
    <AppContext.Provider value={{ store, setStore }}>
      {props.children}
    </AppContext.Provider>
  );
};

export const useStore = () => {
  const context = useContext(AppContext);
  if (!context) throw new Error("AppContext is not valid");
  return context;
};

export type AppContextType = {
  store: Store<any>;
  setStore: SetStoreFunction<any>;
};

const AppContext = createContext<AppContextType>();

async function fetchDbData<T>(query: string) {
  const db = await Database.load("sqlite:mydatabase.db");
  return await db.select<T[]>(query);
}

const categories = createResource(async () =>
  fetchDbData<Category>("SELECT * FROM category;"),
)[0]();

const items = createResource(async () =>
  fetchDbData<Item>("SELECT * FROM item;"),
)[0]();

export const AppProvider: Component<any> = (props: any) => {
  // function createDeepSignal<T>(value: T): Signal<T> {
  //   const [store, setStore] = createStore({
  //     value,
  //   });
  //   return [
  //     () => store.value,
  //     (v: T) => {
  //       const unwrapped = unwrap(store.value);
  //       typeof v === "function" && (v = v(unwrapped));
  //       setStore("value", reconcile(v));
  //       return store.value;
  //     },
  //   ] as Signal<T>;
  // }

  const [store, setStore] = createStore(
    {
      categories,
      items
    });
  return (
    <AppContext.Provider value={{ store, setStore }}>
      {props.children}
    </AppContext.Provider>
  );
};

export const useStore = () => {
  const context = useContext(AppContext);
  if (!context) throw new Error("AppContext is not valid");
  return context;
};

2 Replies

NitonFx•2mo ago

The first thing that jumps at me is that this would try to execute the SQL on the client/browser. I dont know if thats the issue but it should look like

const items = createResource(async () =>
    "use server";
    fetchDbData<Item>("SELECT * FROM item;"),
)[0];

const items = createResource(async () =>
    "use server";
    fetchDbData<Item>("SELECT * FROM item;"),
)[0];

Wild•2mo ago

Thank you for your answer! I wants the code to run on the client side, this is meant to be a desktop app, and if in the future I went down the web app road, I would still go client side first with indexeddb and a remote db sync of some sort. I tried the directive to check, and the error is still there 😦 But I didn't know the "use server" directive could go there, thanks !

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Create one global store with multiple createResource