I'm learning Vue 3 composition API and Pinia. I'm making a todo.
When I submit a todo data through Pinia, I can submit to the DB, but it won't re-render until reload the page.
Do I need to use 'watch' to watch the state todos:[] and execute fetchTodos()?
any good solution?
here both codes, hope someone can help me. Thank you in advance.
----- VUE -----
<script setup>
import { ref, onMounted } from 'vue'
import { storeToRefs } = from 'pinia'
import { useTodoStore } from '../store/todo'
const store = useTodoStore()
const { getTodos } = storeToRefs(store)
onMounted(() => {
store.fetchTodos()
})
const todo = ref('')
const initForm = () => {
todo.value = ''
}
// submit via Pinia
const onSubmitToPinia = () => {
const payload = {
todo: todo.value,
}
store.addTodoFromPinia(payload)
initForm()
store.fetchTodo()
}
</script>
<template>
<h4>TODO</h4>
<!-- form addTodo -->
<form class="row g-4">
<div class="col-auto">
<input
class="form-control"
v-model="newName"
type="text"
placeholder="todo">
</div>
<div>
<button
class="btn btn-primary"
type="button"
#click="onSubmitToPinia(payload)">
submit through pinia</button>
</div>
</form>
<!-- render data from pinia -->
<div class="todo"
v-for="getTodo in getTodoss.todo"
:key="getTodo.id">
<b class="ms-2">{{ getTodo.todo }}</b>
</div>
</template>
---- PINIA ----
import { defineStore } from 'pinia'
import axios from "axios"
export const useAboutStore = defineStore('todo',{
state: () => {
return {
todos: []
}
},
getters: {
getTodos(state) {
return state.todos
}
},
actions: {
async fetchTodos() {
try {
const data = await axios.get('http://localhost:5000/todo')
this.todos = data.data
}
catch (error) {
alert(error)
console.log(error)
}
},
addTodoFromPinia(payload) {
const path = 'http://localhost:5000/todo'
axios.post(path, payload)
}
},
})
You don't need to use storeToRefs to accomplish what you want nor do you need to watch the state of the store.
<template>
<div class="todo"
v-for="getTodo in store.todos"
:key="getTodo.id">
<b class="ms-2">{{ getTodo.todo }}</b>
</div>
</template>
If for any reason the vue complains that the array is empty put a v-if checking if the store.todos.length is != 0.
And also fix your typos.
If the problem persists show me your new code and I help you again.
Related
I stumbled into a totally unexpected problem while refactoring my code to composition API: there doesn't seem to be any (documented) way of accessing current instance from the lifecycle hooks.
sample code:
import { defineComponent, onMounted } from 'vue';
export default defineComponent({
setup() {
onMounted(() => {
console.log(this); // <-- will be undefined
});
},
mounted() {
console.log(this); // <-- will be the component
},
}
I've spent hours trying to find a solution to this and ultimately just used the old options API to get what I want. None of examples, tutorials or documentation - that I read - use this in the hooks.
But I find it unbelievable that only undocumented getCurrentInstance would be the way to get the current instance from the hook.
So, which doc did I miss?
UPDATE
Here is the same example with a component
const { createApp, ref, onMounted } = Vue;
const MyComponent = {
setup() {
const id = ref(Math.round(Math.random() * 100000));
const count = ref(0);
const plus = () => { count.value++; }
const minus = function() { count.value--; }
onMounted(() => {
count.value = Math.round(Math.random() * 10)
});
return {id, count, plus, minus }
},
template: `id: {{id}} <button type="button" #click="minus()">-1</button>
{{count}}
<button type="button" #click="plus()">+1</button><hr/>`
}
const App = {
components: {
MyComponent
}
}
const app = createApp(App)
app.mount('#app')
<div id="app">
<my-component v-for="i in 5" />
</div>
<script src="https://unpkg.com/vue#3/dist/vue.global.prod.js"></script>
What for do you need this in the component?
If you create your component with Composition API, then you can access all the properties directly, without using this.
Here is a very basic example:
const { createApp, ref, onMounted } = Vue;
const App = {
setup() {
const count = ref(0);
const up = () => { count.value++; }
const down = function() { count.value--; }
onMounted(() => {
count.value = 10
});
return {count, up, down }
}
}
const app = createApp(App)
app.mount('#app')
<div id="app">
<button type="button" #click="down()">-1</button>
{{count}}
<button type="button" #click="up()">+1</button>
</div>
<script src="https://unpkg.com/vue#3/dist/vue.global.prod.js"></script>
this is my index code and I want to transfer / send this data to another page
I try this code but it's not working I don't why
import { useRouter } from "next/router";
function index() {
const router = useRouter();
const [inputValue, setInputValue] = useState("");
const handleImgInput = (e) => {
e.preventDefault();
router.push({
pathname: "/createproject/uploadnfts/nftdetails",
query: inputValue,
});
};
return (
<form action="" onSubmit={handleImgInput}>
<input
type="email"
value={inputValue}
onChange={(e) => setInputValue(e.target.value)}
/>
</form>
);
}
this is the data page code. when this page open, I didn't receive the input value from my index page and also what i input in the index file, it appears to my localhost link like this:
http://localhost:3001/data?demo#gmail.com
import { useRouter } from "next/router";
import React from "react";
function Data() {
const router = useRouter();
const {
query: { inputValue },
} = router;
const props = {
inputValue,
};
console.log(props);
return (
<div>
<p>{inputValue}</p>
</div>
);
}
export default Data;
The query property in the router options requires passing an object to it. The query params are formed from the key-value pairs in the object.
See below example from the Next.js docs:
import { useRouter } from 'next/router'
export default function ReadMore({ post }) {
const router = useRouter()
return (
<button
type="button"
onClick={() => {
router.push({
pathname: '/post/[pid]',
query: { pid: post.id },
})
}}
>
Click here to read more
</button>
)
}
Taken from: https://nextjs.org/docs/api-reference/next/router#with-url-object
In your case, this would be something like:
const handleImgInput = (e) => {
e.preventDefault();
router.push({
pathname: "/createproject/uploadnfts/nftdetails",
query: { value: inputValue },
});
};
When you want to access the query params, make sure to reference them like an object's properties. For the example above, this would be:
const { value } = router.query;
I'm trying to save the input values in the Pinia store, but the state is not updating. So I want onSubmit function to save the input values in a store.
My code :
Create.vue
<script setup>
import { reactive } from "vue";
import { useCounterStore } from '#/stores/counter';
const counter = useCounterStore();
const form = reactive({
first: "",
second: "",
email: ""
});
const onSubmit = (e) => {
e.preventDefault();
counter.$patch({ firstName: form.first.value });
counter.$patch({ secondName: form.second.value });
counter.$patch({ email: form.email.value });
}
</script>
<template>
<form #submit="onSubmit">
{{ counter.getFirst + 'MYFIRST' }} {{ counter.getSecond + 'MYSECOND' }} {{ counter.getEmail + 'MYEMAIL' }}
<div class="row mt-4">
<div class="col-6">
<label for="exampleFormControlInput1" class="form-label">First</label>
<input v-model="form.first" type="text" class="form-control" id="exampleFormControlInput1"
placeholder="First name">
</div> <div class="col-6">
<label for="exampleFormControlInput1" class="form-label">Second</label>
<input v-model="form.second" type="text" class="form-control" id="exampleFormControlInput1"
placeholder="Second name">
</div>
<div class="col-6 mt-2">
<label for="exampleFormControlInput1" class="form-label">Email</label>
<input v-model="form.email" type="email" class="form-control" id="exampleFormControlInput1"
placeholder="name#example.com">
</div>
<div class="col-12 mt-3">
<button #click="onSubmit" type="button" class="btn btn-dark push- right">Create</button>
<button type="button" class="btn btn-dark">All users</button>
</div>
</div>
</form>
</template>
Pinia store: counter.js
import { ref, computed, reactive } from 'vue'
import { defineStore } from 'pinia'
export const useCounterStore = defineStore('counter', () => {
const count = ref(0);
let firstName = ref('');
let secondName = ref('');
let email = ref('');
const getFirst = computed(() => firstName.value)
const getSecond = computed(() => secondName.value)
const getEmail = computed(() => email.value)
function increment() {
count.value++
}
return { count, getFirst, getSecond, getEmail, increment }
})
i am not sure how your store look like... but it should by something like:
`
import { defineStore } from 'pinia'
export const useCounterStore = defineStore('counter', {
state: () => {
return { count: 0 }
}
})`
in your component, change the name of the store instance, lets say counterStore.
const counterStore = useCounterStore();
and now you can access the state by name:
counterStore.counter++
while this will work, it is not the best practice...
you should use actions to manipulate the state...
export const useCounterStore = defineStore('counter', {
state: () => {
return { count: 0 }
},
actions: {
increment() {
this.count++
},
},
})
and then you can call the action like a regular method:
counterStore.increment()
I think you're in the process of learning Vue, don't give up!
Give a feedback in comment and put your post on "solved" status if this help you.
The solution :
In store file :
import { defineStore } from 'pinia';
export const useAuthStore = defineStore('auth', {
state: () => ({
loginForm: {
firstName: '',
secondName: '',
email: ''
}
})
});
In Create.vue :
<script setup>
import { reactive } from "vue";
import { useAuthStore } from '#/stores/auth';
const authstore = useAuthStore();
const form = reactive({
first: "",
second: "",
email: ""
});
...
const onSubmit = (e) => {
e.preventDefault();
authStore.loginForm.firstName = form.first;
authStore.loginForm.secondName = form.second;
authStore.loginForm.email = form.email;
}
...
<script/>
I'm making a fullstack app with vue3, axios using FormKit. For editing existing records I want to populate the input fields with the current data fetched from a mysql database. I stripped down the code to everything needed to display my problem, which in this code example is populating the FormKit input field with the lotnumber I fetched via the asynchronous function "getLotById". The lotnumber appears in the paragraph section but not in the input field. How can I properly delay the rendering of the FormKit element until the lotnumber has been fetched? Here's my code:
<script>
// import axios
import axios from "axios";
export default {
name: "LotEdit",
data() {
return {
lotnumber: this.lotnumber
}
},
props: {
lotid: Number
},
created: async function () {
await this.getLotById();
},
methods: {
// Get Lot By Id
async getLotById() {
try {
const response = await axios.get(`http://localhost:5000/lot/${this.$route.params.id}`);
this.lotnumber = response.data.lotnumber;
console.log(response.data);
}
catch (err) {
console.log(err);
}
},
}
};
</script>
<template>
<div>
<FormKit
type="text"
name="lotnumber"
label="lotnumber"
placeholder=""
validation="required"
:value="lotnumber"
/>
</div>
<div>
<p> Here the lotnumber appears: {{ lotnumber }}</p>
</div>
</template>
I suggest using a v-model on the FormKit input. Because it is two-way bound it means as soon as the async/await completes the data is populated on the template too. Something like...
<FormKit
v-model="lotnumber"
type="text"
name="lotnumber"
label="lotnumber"
placeholder=""
validation="required"
:value="lotnumber"
/>
Getting a little smarter I managed to solve the problem in the following way:
<script>
// import axios
import axios from "axios";
export default {
name: "LotEdit",
data() {
return {
lotnumber: this.lotnumber
}
},
props: {
lotid: Number
},
mounted: async function () {
const response = await this.getLotById();
const node = this.$formkit.get('lotnumber')
node.input(response.data.lotnumber, false)
},
methods: {
// Get Lot By Id
async getLotById() {
try {
const response = await axios.get(`http://localhost:5000/lot/${this.$route.params.id}`);
console.log(response.data);
return response;
}
catch (err) {
console.log(err);
}
},
}
};
</script>
<template>
<div>
<FormKit
type="text"
id="lotnumber"
name="lotnumber"
label="lotnumber"
placeholder=""
validation="required"
:value="lotnumber"
/>{{ lotnumber }}
</div>
</template>
Feel free to post any recommendations as I'm not a pro yet...
I'm also still figuring out how to handle controlled forms but I guess an alternative way to do it is with Form Generation
<script>
export default {
// ...
async setup() {
try {
const response = await axios.get(`http://localhost:5000/lot/${this.$route.params.id}`);
const schema = [
{
$formkit: "text",
label: "Lot Number",
value: response.data.lotnumber,
validation: "required",
},
];
} catch (err) {
console.log(err);
}
return { schema }
}
// ...
}
</script>
<template>
<FormKit type="form">
<FormKitSchema :schema="schema" />
</FormKit>
</template>
I'm currently working on a site that pulls Reddit data from different subreddits to show recipes, you can toggle between 3 different ones. That part works fine! I'm able to pull the list of posts from each subreddit, but now I'm trying to make it so when you click a button, it routes you to post details where it'll show the post and comments. I have to do another API call to get that information.
Somewhere along the way, it's getting messed up and it's showing "xhr.js:210 GET https://www.reddit.com/r/recipes/comments/[object%20Object].json 404:" It's a dynamic route, so there are two different parameters I'm trying to use. I did try and console log the parameter for ID(the one showing up as [object object] and it shows up fine by itself and is not an object from what I can tell.
Please see some of the code below where I think things could be going wrong. I'm guessing it's the API call because when I console log it, it only shows the subreddit as an arg but not sure..
redditAPI.js:
import axios from 'axios';
export default axios.create({
baseURL:"https://www.reddit.com/r/"
})
store.js:
import {configureStore} from '#reduxjs/toolkit';
import postReducer from './posts/postSlice';
export const store = configureStore({
reducer: {
posts: postReducer
}
});
postSlice.js:
import {createSlice, createAsyncThunk} from '#reduxjs/toolkit';
import redditApi from '../../common/api/redditApi';
import { redditDetails } from '../../common/api/redditApi';
export const fetchAsyncPosts = createAsyncThunk('posts/fetchAsyncPosts', async (subreddit) => {
const response = await redditApi.get(subreddit)
return response.data.data.children;
});
export const fetchAsyncPostsDetail = createAsyncThunk('posts/fetchAsyncPostsDetail', async (sub, postID) => {
const response = await redditApi.get(`${sub}/comments/${postID}.json`)
return response.data.data.children;
});
const initialState = {
posts: [],
selectedSubreddit: 'recipes.json',
selectedPost: []
}
const postSlice = createSlice({
name: "posts",
initialState,
reducers: {
addPosts: (state, { payload }) => {
state.posts = payload;
},
addSelectedPost: (state, {payload}) => {
state.selectedPost = payload;
},
setSelectedSubreddit(state, action) {
state.selectedSubreddit = action.payload;
}
},
extraReducers: {
[fetchAsyncPosts.pending] : () => {
console.log("Pending");
},
[fetchAsyncPosts.fulfilled] : (state, {payload}) => {
console.log("Fulfilled");
return {...state, posts: payload};
},
[fetchAsyncPosts.rejected]: () => {
console.log("Rejected");
},
[fetchAsyncPostsDetail.fulfilled] : (state, {payload}) => {
console.log("Fulfilled");
return {...state, selectedPost: payload};
},
},
});
export const {addPosts, setSelectedSubreddit} = postSlice.actions;
export const selectSelectedSubreddit = (state) => state.selectedSubreddit;
export const getAllPosts = (state) => state.posts.posts;
export const getSelectedPost = (state) => state.posts.selectedPost;
export default postSlice.reducer;
App.js
import "./App.scss";
import { BrowserRouter as Router, Routes, Route } from "react-router-dom";
import PageNotFound from "./components/PageNotFound/PageNotFound";
import Header from "./components/Header/Header";
import Home from "./components/Home/Home";
import PostDetails from "./components/PostDetails/PostDetails";
import Footer from "./components/Footer/Footer";
import 'bootstrap/dist/css/bootstrap.min.css';
function App() {
return (
<div className="App">
<Router>
<Header/>
<Routes>
<Route path="/" element={<Home />} />
<Route path="/:sub/comments/:postID" element={<PostDetails />} />
<Route path="*" element={ <PageNotFound />} />
</Routes>
</Router>
</div>
);
}
export default App;
Home.js:
import React, {useEffect} from 'react'
import { useDispatch, useSelector } from 'react-redux';
import PostListing from '../PostListing/PostListing'
import { fetchAsyncPosts } from '../../features-redux/posts/postSlice';
function Home() {
const dispatch = useDispatch();
const subreddit = useSelector((state) => state.posts.selectedSubreddit);
useEffect(() => {
dispatch(fetchAsyncPosts(subreddit));
}, [dispatch, subreddit]);
return (
<div>
<div className="jumbotron jumbotron-fluid">
<div className="container text-center">
<h1 className="display-4">Welcome to Tasteful Reddit</h1>
<p className="lead">Toggle between subreddits above to view their recipes.</p>
</div>
</div>
<PostListing />
</div>
)
}
export default Home
postListing.js:
import React from 'react'
import { useSelector } from 'react-redux'
import { getAllPosts } from '../../features-redux/posts/postSlice'
import PostCard from '../PostCard/PostCard';
function PostListing() {
const posts = useSelector(getAllPosts);
const rendering = () => posts.map((post, key) => {
return <PostCard key={key} data={post.data} />;
});
console.log(posts);
return (
<div className="post-wrapper">
<div className="post-container">
{rendering()}
</div>
</div>
)
}
export default PostListing
postCard.js:
import React from 'react'
import parse from 'html-react-parser';
import {Link} from 'react-router-dom';
function PostCard(props) {
const {data} = props;
/* Function to change escaped HTML to string */
const htmlDecode = (input) => {
var doc = new DOMParser().parseFromString(input, "text/html");
return doc.documentElement.textContent;
}
/* Decode reddit JSON's youtube embed HTML */
const youtubeHtmlString = htmlDecode(data.media_embed.content);
/* This function runs through the reddit data to make sure that there is a
an image for the post. If so, shows image
and if its a reddit hosted video or youtube video it will render the video.
Gallery-style posts & all else shows empty div*/
const mediaRender = () => {
if (data.thumbnail !== 'self' && data.thumbnail !== 'default' && data.is_self !== true && data.is_gallery !== true && data.domain !== 'youtu.be' && data.domain !== 'v.redd.it') {
return <img src = {data.url} alt={data.title} className="card-img-top"/>;
} if ( data.is_video == true) {
return (
<div>
<video controls preload = "none">
<source src={data.media.reddit_video.fallback_url} type="video/mp4"/>
Your browser does not support the video tag.
</video>
</div>
)
} if (data.domain == 'youtu.be') {
return (
<div className="Container">
{parse(youtubeHtmlString)}
</div>
)
} else {
return <div></div>
}
}
/* If only text & no photos, render text info*/
const renderSelf = () => {
if(data.is_self == true) {
return (<p>{data.selftext}</p>)
} else {
return <p></p>
}
}
return (
<div className="card mb-3 mx-auto text-center" style={{width: "70%"}}>
<div className="row g-0">
<div className="col-md-5">
{mediaRender()}
</div>
<div className="col-md-7">
<div className="card-body">
<h5 className="card-title">{parse(data.title)}</h5>
<div className="card-text">{renderSelf()}</div>
<div className="card-text"><small className="text-muted">By {data.author}</small></div>
<Link to={`/${data.subreddit}/comments/${data.id}`}>
<button className="btn btn-primary">Go to post</button>
</Link>
</div>
</div>
</div>
</div>
)
}
export default PostCard
postDetails.js:
import React, { useEffect } from 'react'
import { useParams } from 'react-router-dom';
import {useDispatch, useSelector} from 'react-redux';
import { fetchAsyncPostsDetail, getSelectedPost } from '../../features-redux/posts/postSlice';
function PostDetails() {
let {sub, postID} = useParams();
const dispatch = useDispatch();
const data = useSelector(getSelectedPost);
console.log(postID)
useEffect(() => {
dispatch(fetchAsyncPostsDetail(sub, postID));
console.log(dispatch(fetchAsyncPostsDetail(sub, postID)))
}, [dispatch, postID, sub]);
console.log(data);
return (
<div>
PostDetails
</div>
)
}
export default PostDetails
Any help would be appreciated, because I'm lost!
Thanks!
I figured it out today, for those interested!
I finally got it! I figured I was doing something wrong with react router, and that's why I couldn't get it to work but I didn't want to stop using react router. I tried many different ways to fix it, including putting both arguments in an object, I tried changing it by passing what I needed with a pathname AND a state, but the state didn't work right. think that I was passing the state in an incorrect way somehow. I think I wrote it like state{ permalink: data.permalink} or something. I also tried changing it so it only took one parameter, but for some reason the react router Link only wanted to use the post IDs and would go to my page not found if I tried to use permalink. After researching other ways to pass data using React Router, I landed on using From to grab the data from the previous page the user was on and used useLocation to grab the state.
Here is a snippet of what I changed in Link for in PostCard.js. The data was passed in props from postListing.js, just for reference:
return (
<div className="card mb-3 mx-auto text-center" style={{width: "70%"}}>
<div className="row g-0">
<div className="col-md-5">
{mediaRender()}
</div>
<div className="col-md-7">
<div className="card-body">
<h5 className="card-title">{parse(data.title)}</h5>
<div className="card-text">{renderSelf()}</div>
<div className="card-text"><small className="text-muted">By {data.author}</small></div>
<Link to={`/post/${data.id}`}
state={{ from: data}}>
<button className="btn btn-primary">Go to post</button>
</Link>
</div>
</div>
</div>
</div>
)
}
I also stopped using the postId to try and make the API call, and instead only used it to make the dynamic link to the component. After that, I used From's state to grab the permalink(from previous reddit post data) to make the API call to get the comment information.
Here is a snippet of PostDetails.js where I made the changes:
function PostDetails() {
const location = useLocation();
const {from} = location.state;
const comments = useSelector(getSelectedPost);
const dispatch = useDispatch();
useEffect( () => {
dispatch(getPostComments(from.permalink));
}, [dispatch]);
I also found out I was trying to access the data incorrectly in my API call, as the data was structured differently than I originally thought.
Here is the changed thunk in PostSlice.js:
export const getPostComments = createAsyncThunk('posts/getPostComments', async (permalink) => {
const response = await fetch(`http://www.reddit.com${permalink}.json`);
const json = await response.json();
return json[1].data.children.map((comment) => comment.data)
});
There were multiple things wrong with my react app, but hopefully this helps someone else! :)
The second argument to createAsyncThunk is the payloadCreator.
It's called with two arguments, arg which is a single value, and the thunkAPI object.
// First, create the thunk
const fetchUserById = createAsyncThunk(
'users/fetchByIdStatus',
async (userId, thunkAPI) => {
const response = await userAPI.fetchById(userId)
return response.data
}
)
// Later, dispatch the thunk as needed in the app
dispatch(fetchUserById(123))
You are passing the thunkAPI argument as the postID value in the GET request.
export const fetchAsyncPostsDetail = createAsyncThunk(
'posts/fetchAsyncPostsDetail',
async (sub, postID) => {
const response = await redditApi.get(`${sub}/comments/${postID}.json`)
return response.data.data.children;
}
);
If you need to pass multiple values to your thunk then pack them into a single object.
export const fetchAsyncPostsDetail = createAsyncThunk(
'posts/fetchAsyncPostsDetail',
async ({ sub, postID }, thunkAPI) => {
const response = await redditApi.get(`${sub}/comments/${postID}.json`)
return response.data.data.children;
}
);
...
useEffect(() => {
dispatch(fetchAsyncPostsDetail({ sub, postID }));
}, [dispatch, postID, sub]);