Q:

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

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.

A:

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");

