Mobx-state-tree afterCreate() not synchronous in react native











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I am trying to load my application initialState by performing a load() function in the afterCreate() of my UserModel. What I am trying to do is to load an Authenticated page instead of a Login page if I detect that the accessToken is not empty in the UserStore.



However the page renders before the afterCreate() load function is ran. Which ends up always leading me to the login page.



I followed mainly this video tutorial by egghead.io but I am not sure why it's not working in my case.



I'm really stuck and any suggestions is appreciated!



The way I am passing my store is passing in the store using Provider in my App.js.



UserModel.js



const User = types
.model("User", {
accessToken: types.string
})
.actions(self => ({
afterCreate() {
self.load();
},
load: flow(function*() {
const localData = yield LocalDB.get("user");
applySnapshot(self, localData);
})

}));


The object LocalDB is just a wrapper around AsyncStorage to help parse the data into json format.



LocalDB.js



const LocalDB = {    
get: async function(key) {
try {
let value = await AsyncStorage.getItem(key);

try {
return JSON.parse(value);
} catch (err) {
return value;
}
} catch (err) {
console.error(err);
return false;
}


App.js



let store = UserStore.create({...})
export default class App extends Component {
render() {
return (
<Provider store={store}>
<Router />
</Provider>
);
}
}









share|improve this question


























    up vote
    0
    down vote

    favorite












    I am trying to load my application initialState by performing a load() function in the afterCreate() of my UserModel. What I am trying to do is to load an Authenticated page instead of a Login page if I detect that the accessToken is not empty in the UserStore.



    However the page renders before the afterCreate() load function is ran. Which ends up always leading me to the login page.



    I followed mainly this video tutorial by egghead.io but I am not sure why it's not working in my case.



    I'm really stuck and any suggestions is appreciated!



    The way I am passing my store is passing in the store using Provider in my App.js.



    UserModel.js



    const User = types
    .model("User", {
    accessToken: types.string
    })
    .actions(self => ({
    afterCreate() {
    self.load();
    },
    load: flow(function*() {
    const localData = yield LocalDB.get("user");
    applySnapshot(self, localData);
    })

    }));


    The object LocalDB is just a wrapper around AsyncStorage to help parse the data into json format.



    LocalDB.js



    const LocalDB = {    
    get: async function(key) {
    try {
    let value = await AsyncStorage.getItem(key);

    try {
    return JSON.parse(value);
    } catch (err) {
    return value;
    }
    } catch (err) {
    console.error(err);
    return false;
    }


    App.js



    let store = UserStore.create({...})
    export default class App extends Component {
    render() {
    return (
    <Provider store={store}>
    <Router />
    </Provider>
    );
    }
    }









    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I am trying to load my application initialState by performing a load() function in the afterCreate() of my UserModel. What I am trying to do is to load an Authenticated page instead of a Login page if I detect that the accessToken is not empty in the UserStore.



      However the page renders before the afterCreate() load function is ran. Which ends up always leading me to the login page.



      I followed mainly this video tutorial by egghead.io but I am not sure why it's not working in my case.



      I'm really stuck and any suggestions is appreciated!



      The way I am passing my store is passing in the store using Provider in my App.js.



      UserModel.js



      const User = types
      .model("User", {
      accessToken: types.string
      })
      .actions(self => ({
      afterCreate() {
      self.load();
      },
      load: flow(function*() {
      const localData = yield LocalDB.get("user");
      applySnapshot(self, localData);
      })

      }));


      The object LocalDB is just a wrapper around AsyncStorage to help parse the data into json format.



      LocalDB.js



      const LocalDB = {    
      get: async function(key) {
      try {
      let value = await AsyncStorage.getItem(key);

      try {
      return JSON.parse(value);
      } catch (err) {
      return value;
      }
      } catch (err) {
      console.error(err);
      return false;
      }


      App.js



      let store = UserStore.create({...})
      export default class App extends Component {
      render() {
      return (
      <Provider store={store}>
      <Router />
      </Provider>
      );
      }
      }









      share|improve this question













      I am trying to load my application initialState by performing a load() function in the afterCreate() of my UserModel. What I am trying to do is to load an Authenticated page instead of a Login page if I detect that the accessToken is not empty in the UserStore.



      However the page renders before the afterCreate() load function is ran. Which ends up always leading me to the login page.



      I followed mainly this video tutorial by egghead.io but I am not sure why it's not working in my case.



      I'm really stuck and any suggestions is appreciated!



      The way I am passing my store is passing in the store using Provider in my App.js.



      UserModel.js



      const User = types
      .model("User", {
      accessToken: types.string
      })
      .actions(self => ({
      afterCreate() {
      self.load();
      },
      load: flow(function*() {
      const localData = yield LocalDB.get("user");
      applySnapshot(self, localData);
      })

      }));


      The object LocalDB is just a wrapper around AsyncStorage to help parse the data into json format.



      LocalDB.js



      const LocalDB = {    
      get: async function(key) {
      try {
      let value = await AsyncStorage.getItem(key);

      try {
      return JSON.parse(value);
      } catch (err) {
      return value;
      }
      } catch (err) {
      console.error(err);
      return false;
      }


      App.js



      let store = UserStore.create({...})
      export default class App extends Component {
      render() {
      return (
      <Provider store={store}>
      <Router />
      </Provider>
      );
      }
      }






      reactjs react-native mobx mobx-react mobx-state-tree






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      asked Nov 9 at 17:24









      Seeya

      8411




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          Seems like I found the issue. I was initializing my store with some default variables at the start like this:



          let store = UserStore.create({accessToken: ""})


          Once I updated it to null it works fine.



          let store = UserStore.create({accessToken: null})





          share|improve this answer





















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            up vote
            0
            down vote













            Seems like I found the issue. I was initializing my store with some default variables at the start like this:



            let store = UserStore.create({accessToken: ""})


            Once I updated it to null it works fine.



            let store = UserStore.create({accessToken: null})





            share|improve this answer

























              up vote
              0
              down vote













              Seems like I found the issue. I was initializing my store with some default variables at the start like this:



              let store = UserStore.create({accessToken: ""})


              Once I updated it to null it works fine.



              let store = UserStore.create({accessToken: null})





              share|improve this answer























                up vote
                0
                down vote










                up vote
                0
                down vote









                Seems like I found the issue. I was initializing my store with some default variables at the start like this:



                let store = UserStore.create({accessToken: ""})


                Once I updated it to null it works fine.



                let store = UserStore.create({accessToken: null})





                share|improve this answer












                Seems like I found the issue. I was initializing my store with some default variables at the start like this:



                let store = UserStore.create({accessToken: ""})


                Once I updated it to null it works fine.



                let store = UserStore.create({accessToken: null})






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 10 at 1:06









                Seeya

                8411




                8411






























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