Vuex mapstate object undefined and "[vuex] unknown mutation type: "

Question

I'm new with vue.js and vuex and I've an issue with the mapstate object, first I've only one module in my store:

-Store
 -index.js
 -mutations.js
 -actions.js
 -state.js

state.js :

export default {
    userInfo: {
        messages: [{ 1: 'test', 2: 'test' }],
        notifications: [],
        tasks: []
    }
}

So when I try to access the userInfo object everything works correctly:

computed: {
    ...mapState(["userInfo"]),
}

Then I decided to create modules:

-Store
 -modules
  -ldap.js
 -commons.js
 -index.js

So the userInfo is in the commons.js file and now when I try to get the object I always get undefined:

commons.js

// state
const state = {
    userInfo: {
        messages: [{ 1: 'test', 2: 'test' }],
        notifications: [],
        tasks: []
    }
}

export default {
    actions,
    mutations,
    state  
}

Component.vue

computed: {
    ...mapState(["userInfo"]), // <---- undefined
}

main.js :

import Vue from 'vue'
import Vuex from 'vuex'
import commons from './commons'
import ldap from './modules/ldap'

Vue.use(Vuex)

export default new Vuex.Store({
    modules : {
        commons,
        ldap
    } 
})

Can you tell me how to access the userInfo object?

Thanks.

Answer 1

Considering:

• Your commons.js is as follows:

  // state
  const state = {
      userInfo: {
          messages: [{ 1: 'test', 2: 'test' }],
          notifications: [],
          tasks: []
      }
  }
  
  export default {
      namespaced: true, // <== make sure this is defined
      actions,
      mutations,
      state  
  }
  

• And main.js imports it like:

  import commons from './commons'
  // ..
  export default new Vuex.Store({
      modules : {
          commons,
          ldap
      } 
  })
  

• Then update on Component.vue:

  import { mapState } from 'vuex'
  
  // ...
  
  computed: {
      ...mapState('commons', ["userInfo"]), // <== add module name here
  }
  

  Or

  import { createNamespacedHelpers } from 'vuex'
  
  const { mapState, mapActions } = createNamespacedHelpers('commons')
  
  // ...                          notice module name above ^^^^^^^^^
  
  computed: {
      ...mapState(["userInfo"]),
  }
  

"[vuex] unknown mutation type: "

Since you are now namespacing your commons module, that modules' mutations now must be prefixed.

So, say you had a mutation like:

const mutations = {
    changeName(state, data) {
        state.name = data;
    }
}
export default {
    namespaced: true, 
    actions,
    mutations,
    state  
}

And you used it like:

this.$store.commit('changeName', "New Name");

Now use it like:

this.$store.commit('commons/changeName', "New Name");