Property or method not defined on the instance but referenced during render I Vuex

问题

I'm getting the following error.

[Vue warn]: Property or method "updateData" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option.

As far I can tell by the code, the method is there, so I'm stuck on something that I miss due to my ignorance of Vuex. I've googled the matter and got quite a few answers but none of them made me any wiser what to do. It seems to be something with scope, I'm sensing.

I also get the error below but I suspect that it's the same root cause for both so solving the one will resolve the other.

[Vue warn]: Invalid handler for event "click": got undefined (found in component at ...)

The markup is as follow. I've checked that the path goes to the right location. At the moment I'm not sure at all how to even start to troubleshoot it. Any hints would be appreciated.

<template>
  <div id="nav-bar">
    <ul>
      <li @click="updateData">Update</li>
      <li @click="resetData">Reset</li>
    </ul>
  </div>
</template>

<script>
  import { updateData, resetData } from "../vuex_app/actions";

  export default {
    vuex: {
      getters: { activeDataRow: state => state.activeDataRow },
      actions: { updateData, resetData }
    }
  }
</script>

Edit

After input I improved the export to include methods property like so. (Still the same error remaining, though.)

export default {
  vuex: {
    getters: { activeDataRow: state => state.activeDataRow }, 
    actions: { updateData, resetData }, 
    methods:{ 
      updateData: () => this.$store.dispatch("updateData"), 
      resetData: () => this.$store.dispatch("resetData")
    }
  }
}

Do I have to do something extra in the store? It looks like this.

import Vue from "vue";
import Vuex from "vuex";
Vue.use(Vuex);

const state = { dataRows: [], activeDataRow: {} };
const mutations = {
    UPDATE_DATA(state, data) { state.dataRows = data; state.activeDataRow = {}; },
    RESET_DATA(state) { state.dataRows = []; state.activeDataRow = {}; }
};

export default new Vuex.Store({ state, mutations });

回答1:

You have to add the imported functions in the methods of Vue component, like following. You can take help of mapActions as explained in the documentation. This is needed to map this.updateDate to this.$store.dispatch('updateDate').

<script>
  import { updateData, resetData } from "../vuex_app/actions";
  import { mapActions } from 'vuex'

   export default {
    vuex: {
      getters: { activeDataRow: state => state.activeDataRow },
      actions: { updateData, resetData }
    },
    methods: {
       ...mapActions(['updateData', 'resetData'])
    }
  }
</script>

Edited

In case you dont want to use mapActions, you can use this.$store.dispatch as you are using in your example, however you need to have methods at vue compoenent level (documentation) and not insise vuex, as following:

export default {
  vuex: {
    getters: { activeDataRow: state => state.activeDataRow }, 
    actions: { updateData, resetData }
  }, 
  methods:{ 
    updateData: () => this.$store.dispatch("updateData"), 
    resetData: () => this.$store.dispatch("resetData")
  }
}

来源：https://stackoverflow.com/questions/40877970/property-or-method-not-defined-on-the-instance-but-referenced-during-render-i-vu

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