How to access Vuex module getters and mutations? - vue.js

Question

I'm trying to switch to using Vuex instead of my homegrown store object, and I must say I'm not finding the docs as clear as elsewhere in the Vue.js world. Let's say I have a Vuex module called 'products', with its own state, mutations, getters, etc. How do I reference an action in that module called, say, 'clearWorking Data'? The docs give this example of accessing a module's state:
store.state.a // -> moduleA's state
But nothing I can see about getters, mutations, actions, etc.

Answer 1

In Addition to the accepted answer I wanna provide you with a workarround for the getter which is missing in the answer.
Debug the Store
In any case you can call console.log(this.$store) to debug the Store.
If you do so you will see the getters are prefixed with the namespace in their name.
Access namespaced getter
this.$store.getters['yourModuleName/someGetterMethod']
Dispatch namespaced
this.$store.dispatch('yourModuleName/doSomething')
Dispatch namespaced with params
this.$store.getters['yourModuleName/someGetterMethod'](myParam)
Conclusion
The key is to handle the namespace like a file System like Justin explained.
Edit: found a nice library for handling vuex Store
In addition to the basic knowledge I'd like to add this vuex library as a nice addition for working effectivly and fast with the vuex store. https://github.com/davestewart/vuex-pathify .
It looks pretty interesting and cares much of the configuration for you and also allows you to handle 2waybinding directly with vuex.
** Edit: Thanks to the other Answers. Added Dispatching method with params for wholeness.

Answer 2

In your example it would be store.dispatch('products/clearWorkingData') you can think of actions/mutations as a file system in a way. The deeper the modules are nested the deeper in the tree they are.
so you could go store.commit('first/second/third/method') if you had a tree that was three levels deep.

Answer 3

As another addition to the accepted answer, if you need to pass parameter(s) to the getter (for instance to fetch a specific item from the store collection), you need to pass it as follows:
this.$store.getters['yourModuleName/someGetterMethod'](myParam)
I don't think I like this notation very much, but it is what it is - at least for the moment.

Answer 4

Try this approach!
getCounter(){
return this.$store.getters['auth/getToken'];
}
auth is my module name and getToken is my getter.

Answer 5

Using Vuex mapGetters and mapActions you can now do this pretty easily. But I agree, it still isn't very obvious in the documentation.
Assuming your store module 'products' has a getter called 'mostPopular' and an action called 'clearWorkingData':
<template>
<div>
<p>{{mostPopularProduct}}<p>
<p><button #click="clearProductData">Clear data</button></p>
</div>
</template>
<script>
import { mapGetters, mapActions } from "vuex";
export default {
computed: mapGetters({
mostPopularProduct: "products/mostPopular"
}),
methods: mapActions({
clearProductData: "products/clearWorkingData"
})
}
</script>

Answer 6

The mapGetters helper simply maps store getters to local computed properties:
import { mapGetters } from 'vuex'
export default {
// ...
computed: {
// mix the getters into computed with object spread operator
...mapGetters([
'doneTodosCount',
'anotherGetter',
// ...
])
}
}
If you want to map a getter to a different name, use an object:
...mapGetters({
// map `this.doneCount` to `this.$store.getters.doneTodosCount`
doneCount: 'doneTodosCount'
})

Answer 7

You have to be aware of using namespaced: true when configuring particular store object

Answer 8

In Addition to the accepted answer, I feel it's not a good idea to mutate the state and commit the mutation directly in component. Thumb rule I follow is, Always use an action to commit the mutation and state only mutate inside mutations.
Use getters to get a transformed state.
Getters can be mapped to computed using mapGetters and actions can be mapped to methods using mapActions as below example
// component.vue
// namespace_name=products
<template>
<div>
<p> This is awesome product {{getRecentProduct}} </p>
</div>
<button #click="onButtonClick()"> Clear recent</button>
</template>
<script>
import { mapGetters, mapActions } from "vuex";
export default {
computed: {
...mapGetters({
getRecentProduct: "products/getRecentProduct",
}),
anotherComputed(){
return "anotherOne"
}
},
methods: {
...mapActions({
clearRecentProduct: "products/clearRecentProduct",
}),
onButtonClick(){
this.clearRecentProduct(); /// Dispatch the action
},
anotherMethods(){
console.log(this.getRecentProduct); // Access computed props
}
}
};
</script>

Answer 9

Here's how you can access vuex Getters & Mutations using Composition API (setup)
<script setup>
import { useStore } from 'vuex'
const store = useStore();
var value = store.getters['subModuleName/getterMethod'];
store.commit['subModuleName/MutationMethod'];
</script>