dynamic vue component access to vuex - vue.js

I'm using the following code to dynamically create vue components. I'd like them to communicate with the vuex store but it looks like they have no access to it. Does anyone know how to solve this?
let module = this.modules.find(m => m.name === name)
const ModClass = Vue.extend(module.component);
const modInstance = new ModClass({
propsData: {
client: this.client,
}
});
modInstance.$mount();
modInstance.$on('close', () => {
modInstance.$destroy(true);
(modInstance.$el).remove();
})
this.$refs.panels.appendChild(modInstance.$el);

From the docs:
In order to have an access to this.$store property in your Vue components, you need to provide the created store to Vue instance.
Vuex has a mechanism to "inject" the store into all child components from the root component with the store option.
So, in your example this will be here:
const modInstance = new ModClass({
propsData: {
client: this.client,
},
store: yourVuexInstanceHere
});
Are you making a Nuxt plugin? If so, you can reach your store instance by deconstructing it from the context.
export default ({ app: { store } }, inject) => {
// your code...
const modInstance = new ModClass({
propsData: {
client: this.client,
},
store: store
});
// your code...
})

Related

How to pass an argument to Pinia store?

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: { ... }
});

Access Nuxt Router in plugin

I've created a Nuxt plugin that is loaded in the config file with some global functions. In one function, I'd like to access the router, and push to a new route. I am getting an error that router is undefined. Can someone help me understand how I access the router here, if its not attached to the context.
export default (context, inject) => {
const someFunction = () => {
context.router.push({ name: 'route-name' } })
}
}
Try to destruct the context then use app to access the router :
export default ({app}, inject) => {
const someFunction = () => {
app.router.push({ name: 'route-name' } })
}
}
I figured this out. When using context, you can access the router, like this:
context.app.router

"[vuex] state field foo was overridden by a module with the same name at foobar" with deepmerge helper function in jest

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!

Vue test-utils how to test a router.push()

In my component , I have a method which will execute a router.push()
import router from "#/router";
// ...
export default {
// ...
methods: {
closeAlert: function() {
if (this.msgTypeContactForm == "success") {
router.push("/home");
} else {
return;
}
},
// ....
}
}
I want to test it...
I wrote the following specs..
it("should ... go to home page", async () => {
// given
const $route = {
name: "home"
},
options = {
...
mocks: {
$route
}
};
wrapper = mount(ContactForm, options);
const closeBtn = wrapper.find(".v-alert__dismissible");
closeBtn.trigger("click");
await wrapper.vm.$nextTick();
expect(alert.attributes().style).toBe("display: none;")
// router path '/home' to be called ?
});
1 - I get an error
console.error node_modules/#vue/test-utils/dist/vue-test-utils.js:15
[vue-test-utils]: could not overwrite property $route, this is usually caused by a plugin that has added the property asa read-only value
2 - How I should write the expect() to be sure that this /home route has been called
thanks for feedback
You are doing something that happens to work, but I believe is wrong, and also is causing you problems to test the router. You're importing the router in your component:
import router from "#/router";
Then calling its push right away:
router.push("/home");
I don't know how exactly you're installing the router, but usually you do something like:
new Vue({
router,
store,
i18n,
}).$mount('#app');
To install Vue plugins. I bet you're already doing this (in fact, is this mechanism that expose $route to your component). In the example, a vuex store and a reference to vue-i18n are also being installed.
This will expose a $router member in all your components. Instead of importing the router and calling its push directly, you could call it from this as $router:
this.$router.push("/home");
Now, thise makes testing easier, because you can pass a fake router to your component, when testing, via the mocks property, just as you're doing with $route already:
const push = jest.fn();
const $router = {
push: jest.fn(),
}
...
mocks: {
$route,
$router,
}
And then, in your test, you assert against push having been called:
expect(push).toHaveBeenCalledWith('/the-desired-path');
Assuming that you have setup the pre-requisities correctly and similar to this
Just use
it("should ... go to home page", async () => {
const $route = {
name: "home"
}
...
// router path '/home' to be called ?
expect(wrapper.vm.$route.name).toBe($route.name)
});

Nuxt: Vuex commit or dispatch message outside vuejs component

I have an application in nuxt that I want to connect to a websocket, I have seen examples where the callback to receive messages is placed inside a component, but I do not think ideal, I would like to place the callback inside my store, currently my code is something like this
//I'm using phoenix websocket
var ROOT_SOCKET = `wss://${URL}/socket`;
var socket = new Socket(ROOT_SOCKET);
socket.connect()
var chan = socket.channel(`connect:${guid}`);
chan.join();
console.log("esperando mensj");
chan.on("translate", payload => {
console.log(JSON.stringify(payload));
<store>.commit("loadTranslation",payload) //<- how can I access to my store?
})
chan.onError(err => console.log(`ERROR connecting!!! ${err}`));
const createStore = () => {
return new Vuex.Store({
state: {},
mutations:{
loadTranslation(state,payload){...}
},
....
})}
how can I access to my store inside my own store file and make a commit??? is it possible?...
I know there is a vuex plugin but I can't really understand well the documentation and I'll prefer build this without that plugin
https://vuex.vuejs.org/guide/plugins.html
thank you guys...hope you can help me...
You can do it in nuxt plugin https://nuxtjs.org/guide/plugins/
export default {
plugins: ['~/plugins/chat.js']
}
// chat.js
export default ({ store }) => {
your code that use store here
}