Vuex: Access State From Another Module

问题

I want to access state.session in instance.js from records_view.js. How is this accomplished?

store/modules/instance.js

const state = {
  // This is what I want to access in records_view.js
  session: {}
};

const getters = {
  sessionGetter: state => state.session
};

store/modules/records_view.js

const actions = {
  getSettingsAction (context, props) {
    // This is how I'm trying to access session, which doesn't work
    let session = context.state.instance.session;

    Api(
      context,
      {
        noun: props.noun,
        verb: 'GetRecordsViewSettings',
        orgUnitKey: _.has(session, 'orgunit.key') ? session.orgunit.key : '',
        data: {}
      },
      props.callback
    );
  }
};

This is for a little bit of added context.

store/index.js

import Vue from 'vue';
import Vuex from 'vuex';
import * as actions from './actions';
import * as getters from './getters';
import * as types from './mutation-types';

import instance from './modules/instance';
import recordsView from './modules/records_view';

Vue.use(Vuex);

export default new Vuex.Store({
  state,
  actions,
  getters,
  mutations,
  modules: {
    instance,
    recordsView
  }
});

回答1:

state references local state and rootState should be used when accessing the state of other modules.

let session = context.rootState.instance.session;

Documentation: https://vuex.vuejs.org/en/modules.html

回答2:

from an action :

'contacts:update' ({ commit, rootState }) {
    console.log('rootState', rootState.users.form)
    ......

  },

回答3:

For me I had vuex modules, but needed a mutation to update STATE in a different file. Was able to accomplish this by adding THIS

Even in the module you can see what global state you have access to via console.log(this.state)

const mutations = {
MuteChangeAmt(state, payload) {
//From user module; Need THIS keyword to access global state
this.state.user.payees.amount = payload.changedAmt;
 }
}

回答4:

You need to define session in your state like following, to access it in your getters:

const state = {
  session: ''
}

You have to write a mutation, which will be called from your actions to set this state value.

来源：https://stackoverflow.com/questions/41366388/vuex-access-state-from-another-module

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