I'm trying to modify the value of a Vuex store object key, but I'm getting errors with the three following ways:
export const mutations = {
USER_UPDATE(state, payload) {
this.$set(state.user, 'name', payload.name), // test 1
// vm.$set(state.user, 'name', payload.name), // test 2
// Vue.$set(state.user, 'name', payload.name)}, // test 3
}
}
With this. and vm., I get ReferenceError: vm is not defined
With Vue. and import Vue from 'vue' at the top of my store/index.js file, I get TypeError: vue__WEBPACK_IMPORTED_MODULE_6__.default.$set is not a function
What's the correct way to use $set with Nuxt store mutations ?
I finally fixed it using this syntax:
export const mutations = {
USER_UPDATE(state, payload) {
this._vm.$set(state.user, 'name', payload.name);
}
}
Related
I'm making a session API call in main.js and using values from the response as the initial value for my root store. In vuex it's handled this like,
DataService.getSession()
.then((sessionData) => {
new Vue({
i18n,
router,
// this params sessionData.session will be passed to my root store
store: store(sessionData.session),
render: (h) => h(App),
}).$mount('#app');
})
Consumed like,
export default function store(sessionData) { // here I'm getting the sessionData
return new Vuex.Store({
strict: process.env.NODE_ENV !== 'production',
state: {
// some states here
},
});
}
In case of Pinia we're creating a app instance & making it use like,
app.use(createPinia())
And my store would be like,
// how to get that sessionData here
import { defineStore } from 'pinia'
export const useCounterStore = defineStore({
id: 'counter',
state: () => ({
counter: 0
})
})
Is it possible to pass the sessionData someway to the pinia store?
There are 3 ways to pass parameters to a Pinia store - see the list below. You could use either #2 or #3 .
In most cases it is wise to initialise your Vue instance and show the user something while they are waiting for connections to resolve. So you may find it simpler to just access or initialise the store by calling DataService.getSession() in say a "SessionStore" action which can be async. Typically Components =access=> Stores =access=> Services.
Unlike Vuex, you don't need a root Pinia store. You can get just call useSomeStore() in the setup method for any component. Each store can just be an island of data. Pinia stores can reference other pinia store instances. This might be particularly useful if you're migrating a set of Vuex stores to Pinia and need to preserve the old Vuex tree of stores.
1. Pass common params to every action.
export const useStore = defineStore('store1', {
state: () => ({
...
}),
actions: {
action1(param1: string ... ) {
// use param1
}
}
});
2. Initialise store AFTER creating it
Only works if there's one instance of this store required
export const useStepStore = defineStore('store2', {
state: () => ({
param1: undefined | String,
param2: undefined | String,
...
}),
getters: {
getStuff() { return this.param1 + this.param2; }
}
actions: {
init(param1: string, param2: string) {
this.param1 = param1
this.param2 = param2
},
doStuff() {
// use this.param1
}
}
});
3. Use the factory pattern to dynamically create store instances
// export factory function
export function createSomeStore(storeId: string, param1: string ...) {
return defineStore(storeId, () => {
// Use param1 anywhere
})()
}
// Export store instances that can be shared between components ...
export const useAlphaStore = createSomeStore('alpha', 'value1');
export const useBetaStore = createSomeStore('beta', 'value2');
You could cache the session data in your store, and initialize the store's data with that:
In your store, export a function that receives the session data as an argument and returns createPinia() (a Vue plugin). Cache the session data in a module variable to be used later when defining the store.
Define a store that initializes its state to the session data cached above.
In main.js, pass the session data to the function created in step 1, and install the plugin with app.use().
// store.js
import { createPinia, defineStore } from 'pinia'
1️⃣
let initData = null
export const createStore = initStoreData => {
initData = { ...initStoreData }
return createPinia()
}
export const useUserStore = defineStore('users', {
state: () => initData, 2️⃣
})
// main.js
import { createApp } from 'vue'
import App from './App.vue'
import { createStore } from './store'
import * as DataService from './data-service'
DataService.getSession().then(sessionData => {
createApp(App)
.use(createStore(sessionData)) 3️⃣
.mount('#app')
})
demo
When you create a store in Pinia using defineStore() you give it the initial state. So wherever you do that just pass the data into it and then do
defineStore('name', {
state: () => {
isAdmin: session.isAdmin,
someConstant: 17
},
actions: { ... }
});
I have a project where I use Vue 3 and Vuex. This is my first time using Vue 3. I can't seem to get how to access Vuex inside the Setup method of a Vue 3 project.
I have a feature object. That is being set by a Childcomponent using the featureSelected method. Firstly in my setup I create a store constant with useStore; from import { useStore } from "vuex";. Then inside the featureSelected function I call the dispatch function on this store object store.dispatch("setPlot", { geometry: newFeature });.
I keep on getting an error telling me that the dispatch function does not exist on the store object: Uncaught TypeError: store.dispatch is not a function.
setup() {
const store = useStore;
const feature = ref();
const featureSelected = (newFeature) => {
feature.value = newFeature;
store.dispatch("setPlot", { geometry: newFeature });
};
return { feature, featureSelected };
},
useStore is a composable function which should be called using () like :
const store = useStore();
I need to get data from an endpoint, and then assign the data to state variables in the store.
The code looks something like this.
import Vue from 'vue'
import axios from 'axios'
import Vuex from 'vuex'
Vue.use(Vuex)
export const store = new Vuex.Store({
state: {
sample: 'foo',
sample2 : [],
sample3: []
},
getters:{
},
actions:{
getData(context){
axios.get('/endpoint').then(function(response){
console.log(context.state);
console.log(context.state.sample);
console.log(response);
context.state.sample = 'bar';
console.log(context.state.sample);
context.state.sample2 = response.data.sample2data;
context.state.sample3 = response.data.sample3data;
}
);
}
},
mutations:{
}
});
The trouble is the application doesn't execute the axios request at all, as far as I can tell. I've tested the endpoint elsewhere and I'm certain there's nothing wrong with the request itself. Surely, everytime my application is mounted the request should be executed?
In the mounted method of your App.js you can do
mounted() {
this.$store.dispatch('getData')
}
You need to dispatch the action in the created method, where you create your vue instance. If the action is dispatched in a component, the store is only injected after the component is mounted. The data will only load after mounting the component which means component(s) that need to read the data, will have access to it, however the data in the state will be undefined on load.
export const store = new Vuex.Store({
state: {
sample2 : [], // undefined
sample3: [] // undefined
},
getters:{
},
actions:{
getData(context){
axios.get('/endpoint').then(function(response){
context.state.sample2 = response.data.sample2data;
context.state.sample3 = response.data.sample3data;
}
);
}
},
mutations:{
}
});
The below ensures that action is dispatched before mounting any components, and therefore the components will be able to read the state after the action has properly set the values
import {store} from 'path/to/store/';
new Vue({
el: '#app',
computed:,
store: store,
created() {
this.$store.dispatch('getData') // dispatch loading
}
})
I'm using a helper function to create a store inside my jests. The helper function uses deepmerge to merge the basic configuration with a customized configuration. This results in multiple console warnings
[vuex] state field "cart" was overridden by a module with the same name at "cart"
[vuex] state field "customer" was overridden by a module with the same name at "customer"
[vuex] state field "checkout" was overridden by a module with the same name at "checkout"
store.js (Reduced to a minimum for presentation purpose)
import cart from './modules/cart'
import checkout from './modules/checkout'
import customer from './modules/customer'
Vue.use(Vuex)
export const config = {
modules: {
cart,
customer,
checkout,
},
}
export default new Vuex.Store(config)
test-utils.js
import merge from 'deepmerge'
import { config as storeConfig } from './vuex/store'
// merge basic config with custom config
export const createStore = config => {
const combinedConfig = (config)
? merge(storeConfig, config)
: storeConfig
return new Vuex.Store(combinedConfig)
}
making use of the helper function inside
somejest.test.js
import { createStore } from 'test-utils'
const wrapper = mount(ShippingComponent, {
store: createStore({
modules: {
checkout: {
state: {
availableShippingMethods: {
flatrate: {
carrier_title: 'Flat Rate',
},
},
},
},
},
}),
localVue,
})
How do I solve the console warning?
I believe the warning is somewhat misleading in this case. It is technically true, just not helpful.
The following code will generate the same warning. It doesn't use deepmerge, vue-test-utils or jest but I believe the root cause is the same as in the original question:
const config = {
state: {},
modules: {
customer: {}
}
}
const store1 = new Vuex.Store(config)
const store2 = new Vuex.Store(config)
<script src="https://unpkg.com/vue#2.6.11/dist/vue.js"></script>
<script src="https://unpkg.com/vuex#3.4.0/dist/vuex.js"></script>
There are two key parts of this example that are required to trigger the warning:
Multiple stores.
A root state object in the config.
The code in the question definitely has multiple stores. One is created at the end of store.js and the other is created by createStore.
The question doesn't show a root state object, but it does mention that the code has been reduced. I'm assuming that the full code does have this object.
So why does this trigger that warning?
Module state is stored within the root state object. Even though the module in my example doesn't explicitly have any state it does still exist. This state will be stored at state.customer. So when the first store gets created it adds a customer property to that root state object.
So far there's no problem.
However, when the second store gets created it uses the same root state object. Making a copy or merging the config at this stage won't help because the copied state will also have the customer property. The second store also tries to add customer to the root state. However, it finds that the property already exists, gets confused and logs a warning.
There is some coverage of this in the official documentation:
https://vuex.vuejs.org/guide/modules.html#module-reuse
The easiest way to fix this is to use a function for the root state instead:
state: () => ({ /* all the state you currently have */ }),
Each store will call that function and get its own copy of the state. It's just the same as using a data function for a component.
If you don't actually need root state you could also fix it by just removing it altogether. If no state is specified then Vuex will create a new root state object each time.
It is logged when a property name within the state conflicts with the name of a module, like so:
new Vuex.Store({
state: {
foo: 'bar'
},
modules: {
foo: {}
}
})
therefore this raises the warning.
new Vuex.Store(({
state: {
cart: '',
customer: '',
checkout: ''
},
modules: {
cart: {},
customer: {},
checkout: {},
}
}))
its most likely here
export const createStore = config => {
const combinedConfig = (config)
? merge(storeConfig, config)
: storeConfig
return new Vuex.Store(combinedConfig)
}
from the source code of vuex, it helps indicate where these errors are being raised for logging.
If you run the app in production, you know that this warning wont be raised... or you could potentially intercept the warning and immediately return;
vuex source code
const parentState = getNestedState(rootState, path.slice(0, -1))
const moduleName = path[path.length - 1]
store._withCommit(() => {
if (__DEV__) {
if (moduleName in parentState) {
console.warn(
`[vuex] state field "${moduleName}" was overridden by a module with the same name at "${path.join('.')}"`
)
}
}
Vue.set(parentState, moduleName, module.state)
})
vuex tests
jest.spyOn(console, 'warn').mockImplementation()
const store = new Vuex.Store({
modules: {
foo: {
state () {
return { value: 1 }
},
modules: {
value: {
state: () => 2
}
}
}
}
})
expect(store.state.foo.value).toBe(2)
expect(console.warn).toHaveBeenCalledWith(
`[vuex] state field "value" was overridden by a module with the same name at "foo.value"`
)
Well, I believe there is no need for using deepmerge in test-utils.ts. It is better we use Vuex itself to handle the merging of the module instead of merging it with other methods.
If you see the documentation for Vuex testing with Jest on mocking modules
you need to pass the module which is required.
import { createStore, createLocalVue } from 'test-utils';
import Vuex from 'vuex';
const localVue = createLocalVue()
localVue.use(Vuex);
// mock the store in beforeEach
describe('MyComponent.vue', () => {
let actions
let state
let store
beforeEach(() => {
state = {
availableShippingMethods: {
flatrate: {
carrier_title: 'Flat Rate',
},
},
}
actions = {
moduleActionClick: jest.fn()
}
store = new Vuex.Store({
modules: {
checkout: {
state,
actions,
getters: myModule.getters // you can get your getters from store. No need to mock those
}
}
})
})
});
whistle, In test cases:
const wrapper = shallowMount(MyComponent, { store, localVue })
Hope this helps!
I'm trying to implement Vuex i18n package within my Nuxt application. In my nuxt.conf.js file in plugins array I have:
{
src: '#/plugins/i18n.js',
ssr: false
},
plugins/i18n.js file is:
import Vue from "vue";
import vuexI18n from "vuex-i18n/dist/vuex-i18n.umd.js";
import toEnglish from "../translations/toEnglish";
import toSpanish from "./../translations/toSpanish";
import toGerman from "./../translations/toGerman";
export default ({ store }) => {
Vue.use(
vuexI18n.plugin,
store,
{
onTranslationNotFound: function (locale, key) {
console.warn(`vuex-i18n :: Key '${key}' not found for locale '${locale}'`)
}
}
);
// register the locales
Vue.i18n.add('en', toEnglish);
Vue.i18n.add('de', toGerman);
Vue.i18n.add('es', toSpanish);
// Set the start locale to use
Vue.i18n.set('de');
Vue.i18n.fallback('en');
}
Last thing is my store. I'm using classic mode of vuex store in Nuxt:
import Vuex from "vuex";
const store = () => {
return new Vuex.Store({
state: () => ({
currentLanguage: ''
}),
mutations: {
changeLang(state, response) {
if (response) {
console.log(this);
state.currentLanguage = response;
this.i18n.set(response);
}
}
}
})
};
export default store;
As you can see in store file in mutation I'm trying to access i18n plugin with this keyword. Unfortunetally in print error in console:
TypeError: Cannot read property 'set' of undefined
this which I consoled also inside mutation is:
I changed this.i18n.set(response); to state.i18n.locale = response; inside my mutation and now it seems working.
For some reason when I call this mutation my video.js player refresh. I will try to find out why.