I want to load data with a GET request and fill the data to the input data attributes at vue.js 3 like
<input id="name" type="text" v-bind:placeholder="$t('message.NamePlaceholder')" value="{{ name }}" required>
and this is my script part
<script>
export default {
data () {
return {
userInformation: {},
name: "",
}
},
mounted () {
this.getUserInformation();
},
methods () {
getUserInformation() {
this.$axios({
method: 'get',
url: 'http://127.0.0.1:8000/api/get_user_information',
}).then(response => {this.userInformation = response.data});
this.name = this.userInformation.Name;
}
},
}
But the input field contains only {{ name }}. I tried also v-bind:value, but this didn't solve the problem.
Whenever you need to bind values to attributes {{}} are unnecessary. You can just write v-bind:value="name" or :value="name"
E.g.:
<input id="name" type="text" :placeholder="message.NamePlaceholder" :value="name" required></input>
The mistake was that I have to set the variable this.name at the axios command:
this.$axios({
method: 'get',
url: 'http://127.0.0.1:8000/api/get_user_information',
}).then(response => {
this.userInformation = response.data;
this.name = this.userInformation.Name;
});
Related
I'm using b-form-select with server-side generated option tags:
<b-form-select :state="errors.has('type') ? false : null"
v-model="type"
v-validate="'required'"
name="type"
plain>
<option value="note" >Note</option>
<option value="reminder" >Reminder</option>
</b-form-select>
When no data is set for this field I want to auto-select the first option in the list.
Is this possible? I have not found how to access the component's options from within my Vue instance.
your v-model should have the value of the first option.
example
<template>
<div>
<b-form-select v-model="selected" :options="options" />
<div class="mt-3">Selected: <strong>{{ selected }}</strong></div>
</div>
</template>
<script>
export default {
data() {
return {
selected: 'a',
options: [
{ value: null, text: 'Please select an option' },
{ value: 'a', text: 'This is First option' },
{ value: 'b', text: 'Selected Option' },
{ value: { C: '3PO' }, text: 'This is an option with object value' },
{ value: 'd', text: 'This one is disabled', disabled: true }
]
}
}
}
</script>
You can trigger this.selected=${firstOptionValue} when no data is set.
what if we don't know what the first option is. The list is generated?
if you have dynamic data, something like this will work.
<template>
<div>
<b-form-select v-model="selected" :options="options" />
<div class="mt-3">Selected: <strong>{{ selected }}</strong></div>
</div>
</template>
<script>
export default {
data() {
return {
selected: [],
options: [],
};
},
mounted: function() {
this.getOptions();
},
methods: {
getOptions() {
//Your logic goes here for data fetch from API
const options = res.data;
this.options = res.data;
this.selected = options[0].fieldName; // Assigns first index of Options to model
return options;
},
},
};
</script>
If your options are stored in a property which is loaded dynamically:
computed property
async computed (using AsyncComputed plugin)
through props, which may change
Then you can #Watch the property to set the first option.
That way the behavior of selecting the first item is separated from data-loading and your code is more understandable.
Example using Typescript and #AsyncComputed
export default class PersonComponent extends Vue {
selectedPersonId: string = undefined;
// ...
// Example method that loads persons data from API
#AsyncComputed()
async persons(): Promise<Person[]> {
return await apiClient.persons.getAll();
}
// Computed property that transforms api data to option list
get personSelectOptions() {
const persons = this.persons as Person[];
return persons.map((person) => ({
text: person.name,
value: person.id
}));
}
// Select the first person in the options list whenever the options change
#Watch('personSelectOptions')
automaticallySelectFirstPerson(persons: {value: string}[]) {
this.selectedPersonId = persons[0].value;
}
}
so I have a component that is rendering a form and it also is pre-filling the fields with data received from ajax request.
My issue is that I want to not only be able to edit fields but also add new fields to submit at the same time, so because of this I am trying to initialize my pre-filled data and new data into the same Object to be submitted with my ajax request. With my current set up the form-data is not consistently filling in the fields before the form is rendered.
This is the form template
<form #submit.prevent="editThisWorkflow" class="d-flex-column justify-content-center" >
<div>
<input type="text" v-model="workflowData.workflow">
</div>
<div >
<div v-for="object in workflowData.statuses" :key="object.id">
<input type="text" v-model="object.status">
</div>
<div v-for="(status, index) in workflowData.newStatuses" :key="index">
<input type="text" placeholder="Add Status" v-model="status.value">
<button type="button" #click="deleteField(index)">X</button>
</div>
<button type="button" #click="addField">
New Status Field
</button>
</div>
<div>
<div>
<button type="submit">Save</button>
<router-link :to="{ path: '/administrator/workflows'}" >Cancel</router-link>
</div>
</div>
</form>
This is the script
data() {
return {
workflowData: {
id: this.$store.state.workflow.id,
workflow: this.$store.state.workflow.workflow,
statuses: this.$store.state.workflow.statuses,
newStatuses: []
},
workflowLoaded: false
}
},
computed: {
...mapGetters(['workflow']),
},
methods: {
...mapActions(['editWorkflow']),
editThisWorkflow() {
this.editWorkflow({
id: this.workflowData.id,
workflow: this.workflowData.workflow,
statuses: this.workflowData.statuses,
newStatuses: this.workflowData.newStatuses
})
},
addField() {
this.workflowData.newStatuses.push({ value: ''});
},
deleteField(index) {
this.workflowData.newStatuses.splice(index, 1);
}
And this is the store method to submit the data
editWorkflow(context, workflowData) {
axios.patch('/workflowstatuses/' + workflowData.id, {
workflow: workflowData.workflow,
statuses: workflowData.statuses,
newStatuses: workflowData.newStatuses
})
.then(response => {
context.commit('editWorkflow', response.data)
})
.catch(error => {
console.log(error.response.data)
})
},
My problem comes in here
data() {
return {
workflowData: {
id: this.$store.state.workflow.id,
workflow: this.$store.state.workflow.workflow,
statuses: this.$store.state.workflow.statuses,
newStatuses: []
},
workflowLoaded: false
}
},
Is there a better way to set this part??
workflowData: {
id: this.$store.state.workflow.id,
workflow: this.$store.state.workflow.workflow,
statuses: this.$store.state.workflow.statuses,
newStatuses: []
},
If you only need to assign store values to your form once then you can use mounted function.
mounted: function() {
this.id = this.$store.state.workflow.id
this.workflow = this.$store.state.workflow.workflow
this.statuses = this.$store.state.workflow.statuses
},
data() {
return {
workflowData: {
id: '',
workflow: '',
statuses: '',
newStatuses: []
},
workflowLoaded: false
}
},
the data property does not accept this, I usually use arrow function in this question because it prohibits me from using this, and prohibits my team from also using this within the data.
Declare all necessary items within the datato maintain reactivity, and assign the value within the mounted of the page.
mounted() {
this.workflowData.id = this.$store.state.workflow.id
this.workflowData.workflow = this.$store.state.workflow.workflow
this.workflowData.statuses = this.$store.state.workflow.statuses
},
data: () => ({
workflowData: {
id: '',
workflow: '',
statuses: '',
newStatuses: []
},
workflowLoaded: false
}
},
})
The way how I resolved this problem turned out to be simpler than most of the solutions presented here. I found it hard to reach data from this.$store.state due to Vuejs life cycle. And assigning values to v-mode tourned out to be impossible because "v-model will ignore the initial value, checked or selected attributes found on any form elements. It will always treat the Vue instance data as the source of truth."
Solution
To pre-fill the field with data received from ajax request e.g. input field of type email I did as follow.
1st. I saved the output of my ajax request in application's storage (Cookies) -it can be Local Storage or Session, depended what is appropriate to you.
2nd. I populated my Vuex's store (single source of truth) with the data from my application storage. I do it every time when I reload a page.
3rd. Instead of binding a data to v-model in Vuejs life cycle, or using value attribute of html input (<input type="email" value="email#example.com">). I Pre-filled input by populating placeholder attribute of html with data coming from Vuex store like this:
<input v-model="form.input.email" type="email" name="email" v-bind:placeholder="store.state.user.data.email">
I'm trying to adapt a working form I found for polymer 1.0 in order to work on polymer 2.0 but these two way data bindings don't seem to work.
My template:
<paper-input>
<label>Username</label>
<iron-input bind-value={{formData.username}}><input id="username" type="text" value="{{formData::input}}"></iron-input>
</paper-input>
<paper-input>
<label>Password</label>
<iron-input bind-value={{formData.password}}><input id="password" type="password" value="{{formData::input}}"></iron-input>
</paper-input>
<div class="wrapper-btns">
<paper-button raised class="primary" on-tap="postLogin">Log In</paper-button>
<paper-button class="link" on-tap="postRegister">Sign Up</paper-button>
</div>
My actions:
class MyLogin extends Polymer.Element {
static get is() { return 'my-login'; }
static get properties() {
return {
storedUser: Object,
error: String,
formData: {
type: Object,
value: {},
},
}
}
_setReqBody() {
console.log(this.formData) // <--- THIS LINE!
this.$.registerLoginAjax.body = this.formData;
}
postLogin() {
this.$.registerLoginAjax.url = 'http://localhost:3001/sessions/create';
this._setReqBody();
this.$.registerLoginAjax.generateRequest();
}
}
The indicate line will always print undefined though. What am I doing wrong?
Here's the full code: https://github.com/lpfjustino/PolymerQuickstart/blob/master/web/src/my-login.html
And here's the code mine is based on:
https://auth0.com/blog/build-your-first-app-with-polymer-and-web-components/
paper-input doesn't need any label nor iron-input inside it by default. That only goes for paper-input-container. So the following would be okay
<paper-input label="Username" value="{{formData.username}}"></paper-input>
However if you insist on using paper-input-container instead, then
<paper-input-container>
<label slot="label">Username</label>
<iron-input bind-value="{{formData.username}}" slot="input">
<!-- You don't need to add two-way binding for your input element here
since `iron-input` already handles that for you using its `bind-value`
attribute. -->
<input />
</iron-input>
</paper-input-container>
Also, when you declare an Object property, you should initialize it using a function to insure that each element instance would have its own copy of the property.
static get properties() {
return {
...
formData: {
type: Object,
value: function() {
return {}; // or return { username: '', password: '' }
},
},
};
}
I am completely new to Angular 2 and form concept. I am trying to POST form data to a POST API call. like this
POST API : http://localohot:8080/**********
Component :
user: any = {
id: null,
gender: null,
mstatus: null,
birthdate: null,
bloodgroup: null
}
userName: any = {
id: null,
personId: null,
displayName: '',
prefix: null,
givenName: null
}
userAddressJSON: any = {
id: null,
personId: null,
address1: null,
address2: null,
cityVillage: null
}
var form = new FormData();
form.append('userid', new Blob(['' + uid], { type: 'application/json' }));
form.append('user', new Blob([JSON.stringify(this.user)], { type: 'application/json' }));
form.append('userName', new Blob([JSON.stringify(this.userName)], { type: 'application/json' }));
form.append('userAddress', new Blob([JSON.stringify(this.userAddressJSON)], { type: 'application/json' }));
Here, I don't know how to make API call.
In our old application they used form data POST in jQuery. Now I am trying to do the same in Angular 2. When I do the form POST in old application they are sending like this
------WebKitFormBoundarybAWvwmP2VtRxvKA7
Content - Disposition: form - data; name = "userid"; filename = "blob"
Content - Type: application / json
------WebKitFormBoundarybAWvwmP2VtRxvKA7
Content - Disposition: form - data; name = "user"; filename = "blob"
Content - Type: application / json
------WebKitFormBoundarybAWvwmP2VtRxvKA7
Content - Disposition: form - data; name = "userName"; filename = "blob"
Content - Type: application / json
------WebKitFormBoundarybAWvwmP2VtRxvKA7
Content - Disposition: form - data; name = "userAddress"; filename = "blob"
Content - Type: application / json
Can any one help me how to do that form POST in Angular 2.
Here is how I currently make a POST call in my Angular 2 app, because it sounds like you could use a simple example of how to setup a form. Here is the Angular 2 documentation on How to Send Data to the Server.
For even more high level documentation on making AJAX requests in Angular 2 visit this URL.
in my app/app.module.ts
...
import { HttpModule } from '#angular/http';
...
#NgModule({
imports: [
...
HttpModule
...
],
declarations: [
...
],
providers: [ ... ],
bootstrap: [AppComponent],
})
export class AppModule { }
app/system-setup/system-setup.ts
export class SystemSetup {
system_setup_id: number;
name: string;
counter: number;
}
app/form-component/form.component.html (Notice the [(ngModel)], that is what binds the property of the object to the html input element)
<form class="form" (ngSubmit)="saveEdits()" #editSystemSetupForm="ngForm">
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label for="name">Name</label>
<input type="text" class="form-control" id="theName" name="name" [(ngModel)]="selectedItem.name" #itemsName="ngModel" required minlength="3"/>
<div [hidden]="itemsName.valid || itemsName.pristine" class="alert alert-danger">Name is required! Min length of 3.</div>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label for="">Counter</label>
<input type="number" step=0.01 class="form-control" name="counter" [(ngModel)]="selectedItem.counter" />
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 col-md-offset-8">
<button type="submit" class="btn btn-success" style="float: right; margin-left: 15px;" [disabled]="!editISystemSetupForm.form.valid" >Save</button>
<button type="button" class="btn btn-danger" style="float: right;" (click)="cancelEdits()">Cancel</button>
</div>
</div>
</form>
in my app/form-component/form.component.ts
import { Component, OnInit, Input, Output, EventEmitter } from '#angular/core';
import { Headers, RequestOptions, Http, Response } from '#angular/http';
import { SystemSetup } from '../system-setup/system-setup';
#Component({
selector: 'app-setup-form',
templateUrl: 'setup-form.component.html',
styleUrls: ['setup-form.component.css']
})
export class SetupFormComponent implements OnInit {
#Input() selectedItem: SystemSetup; // The object to be edited
#Output() finishedEditing = new EventEmitter<number>(); // When the POST is done send to the parent component the new id
// Inject the Http service into our component
constructor(private _http: Http) { }
// User is finished editing POST the object to the server to be saved
saveEdits(): void {
let body = JSON.stringify( this.selectedItem );
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this._http.post('http://localhost:8080/**********', body, options)
.map(this.extractData)
.do(
data => {
this.finishedEditing.emit(data.system_setup_id); // Send the parent component the id if the selectedItem
})
.toPromise()
.catch(this.handleError);
}
/**
* Gets the data out of the package from the AJAX call.
* #param {Response} res - AJAX response
* #returns SystemSetup - A json of the returned data
*/
extractData(res: Response): SystemSetup {
let body = res.json();
if (body === 'failed') {
body = {};
}
return body || {};
}
/**
* Handles the AJAX error if the call failed or exited with exception. Print out the error message.
* #param {any} error - An error json object with data about the error on it
* #returns Promise - A promise with the error message in it
*/
private handleError(error: any): Promise<void> {
// In a real world app, we might use a remote logging infrastructure
// We'd also dig deeper into the error to get a better message
let errMsg = (error.message) ? error.message :
error.status ? `${error.status} - ${error.statusText}` : 'Server error';
console.error(errMsg); // log to console instead
return Promise.reject(errMsg);
}
}
This URL is the link to the official Angular 2 documentation site, which is a very good reference for anything an Angular 2 developer could want.
I'm develop in ng2 rc4 and my User data stored Mongo DB. User's can edit their data in my page, but my editing page hav got a problem. My source looks like this:
import { User } from './user.service.ts';
#component(
selector: 'edit-user',
template: `
Email : <input type="text" [(ngModel)]="userInfo.email"><br />
Name : <input type="text" [(ngModel)]="userInfo.name"><br />
Address : <input type="text" [(ngModel)]="userInfo.address"><br />
Tel :
<input type="text" [(ngModel)]="userInfo.tel.tel1">-
<input type="text" [(ngModel)]="userInfo.tel.tel2">-
<input type="text" [(ngModel)]="userInfo.tel.tel3"><br />
<button>Submit</button>
`,
providers: [ User ]
)
export class EditUser {
private userInfo: any = {
'email': '',
'name': '',
'address': '',
'tel': {
'tel1': '',
'tel2': '',
'tel3': ''
}
};
constructor(private user: User) {
}
ngOnInit() {
this.getUser();
}
getUser() {
this.user.getUser( ... )
.then(res => {
...
// case 1
// res = {'email': 'a#a.a', 'name': 'NameA', 'address': 'aaa', 'tel': {'tel1': '1', 'tel2': '2', 'tel3': '3'}};
// case 2
// res = {'email': 'b#b.b', 'name': 'NameB'};
this.userInfo = res;
...
})
.catch( ... )
}
}
Everything is okay when in case 1 but in case 2 there is no tel object and input tag throws error because of the missing tel object in res. The user was not entering tel information in the case 2. So it is a 2 way binding error: undefined tel property of userInfo. don't expression, don't enter the tel.tel1 property.
I can't change mongoDB and json hierarchy. How can I resolve this?
Assign empty object to tel if empty
res.tel = res.tel || {};
this.userInfo = res;