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Trying to change data inside #click inside v-for

i have a v-for loop as my selection for dialog boxes I want to open
<v-card #click="page.model = true">
page.model is my v-model for a v-dialog
data() {
return {
dialog1: false,
dialog2: false,
pages: [
{
id: "1",
model: "dialog1",
},
{
id: "2",
model: "dialog2",
},
],
};
},
howcome #click="page.model = true" doesn't work but #click=dialog1 = true " does?
I also tried :#click="page.model = true" and #click="${page.model} = true"
Thank you in advance

So we dont see your modal HTML so I presume something like this:
<v-card v-for="page in pages" #click="changePage(page.id)">
<modal v-model="pages[0].isOpen">[CONTAIN OF PAGE 1]</modal>
<modal v-model="pages[1].isOpen">[CONTAIN OF PAGE 2]</modal>
data() {
return {
pages: [
{
id: "1",
model: "dialog1",
isOpen: false,
},
{
id: "2",
model: "dialog2",
isOpen: false,
},
],
},
methods: {
changePage(id) {
// close all other modal page
this.pages.each(el => el.isOpen = false);
// open the good one
const index = this.pages.findIndex(el => el.id == id);
this.pages[index].isOpen = true;
}
},

I have done something similar. Call a method and pass index of item. In the method you can then access the specific model via index
<v-card #click="updateDialog(index)">
updateDialog(i): {
this.pages[i].model = true
}

How to update vue-meta on route/url change?

The meta data on my website is not updating when the route changes. The route itself has a watch on it which updates the view fine, but the metaInfo() from vue-meta is not keeping up. The <script> section of my code looks like this:
<script>
export default {
name: "Product",
watch: {
'$route.params.ProductID': {
deep: true,
immediate: true,
handler() {
this.getProduct(); // calls getProduct() on route change. Can I also call metaInfo() from here somehow?
}
}
},
metaInfo() {
return {
title: this.Product.ProductTitle,
meta: [
{
name: 'description', content: this.Product.ProductTitle
}
]
}
},
computed: {
Product() {
return this.$store.getters.getProduct
}
}, mounted() {
if (this.Product == null || !this.Product.length) {
this.getProduct();
}
}, methods: {
getProduct() {
return this.$store.dispatch('loadProduct', {ProductID: this.$route.params.ProductID})
}
}
}
</script>
What is happening is that when I change my route and go from /product/123 to /product/124, the metaInfo() still shows the meta data for /product/123. If I hit refresh, then the metaInfo() updates and shows the correct data for /product/124.
I need the watch to trigger an update of metaInfo() but don't know how to do it. I can't find this information in the docs anywhere. Please help?

For reactive, use variables outside return statements.
metaInfo() {
const title = this.Product.ProductTitle;
return {
title: title,
meta: [
{
name: 'description', content: title
}
]
}
}
https://vue-meta.nuxtjs.org/guide/caveats.html#reactive-variables-in-template-functions

Sending data to a non parent component in VueJs

I am trying to replicate the TODO MVC in VueJs.
(Please checkout this codepen : http://codepen.io/sankalpsingha/pen/gwymJg )
I have created a component called 'todo-list' with the following code :
Vue.component('todo-list',{
template: '#todo-list',
props: ['todo'],
data: function() {
return {
// Let us set up a isEditing Boolean so that we can know if the user
// will edit something and we need to change the state to reflect it.
isEditing: false,
}
},
methods: {
enableEditing: function() {
this.isEditing = true;
},
editTodo: function(todo) {
// todo.todo = todo.todo.trim();
this.isEditing = false;
},
removeTodo: function(todo) {
//this.todos.$remove(todo); // --> This part is not working?
}
}
});
However, I have the data defined in the app instance :
var app = new Vue({
el: '#todo-section',
data: {
newTodo: '',
todos: [
{
id: 1,
todo: 'Go to the grocery',
completed: false,
},
{
id: 2,
todo: 'See the movie',
completed: true,
},
{
id: 3,
todo: 'Jack Reacher : Tom Cruise',
completed: false,
}
]
},
methods: {
addTodo: function() {
// This will not allow any empty items to be added.
if(this.newTodo.trim() == '') {
return;
}
this.todos.push({
todo: this.newTodo.trim(),
completed: false,
});
this.newTodo = '';
}
}
});
I am not able to delete a single Todo from the list. My guess is that I have to send a emit message to the app instance and put up a listener there to delete the data from it? How do I delete the data?

When I tried to delete by clicking the x button in your codePen example, I see the error: this.$parent.todos.$remove is not a function.
I have not looked deeply into your code. But attempting to access parent component methods using this.$parent is not a good idea. Reason: a component can be used anywhere, and assuming that it will have a $parent with a particular property or method is risky.
As you suggested in your question, you need to use $emit from the child component to delete the data.
There was another similar question here few days ago, for which I created a jsFiddle: https://jsfiddle.net/mani04/4kyzkgLu/
The child component has some code like:
<button #click="$emit('delete-row')">Delete</button>
This sends out an event to parent component. Parent component can subscribe to that event using v-on as seen in that jsFiddle example.
Here is that other question for reference: Delete a Vue child component

It's preferable to use your methods (DeleteTodo, EditTodo...) in your parent.
var app = new Vue({
el: '#app',
data: {
newTodo: '',
todos: [{
id: 1,
title: 'Go to the grocery',
completed: false
}, {
id: 2,
title: 'See the movie',
completed: true
}, {
id: 3,
title: 'Jack Reacher : Tom Cruise',
completed: false
}]
},
methods: {
addTodo: function() {
this.todos.push({
todo: this.newTodo.trim(),
completed: false
});
this.newTodo = ''
},
deleteTodo: function(todo) {
this.todos = this.todos.filter(function(i) {
return i !== todo
})
}
}
});
<div id="app">
<ul>
<li v-for="todo in todos">{{ todo.title }}
<button #click.prevent="deleteTodo(todo)">
Delete
</button>
</li>
</ul>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.0.3/vue.js"></script>

How do I display data through components with Vue.js (using Vueify)?

I'm having trouble getting data to display in my Vue components. I'm using Vueify and I'm trying to load an array of listings from the listings.vue component and I keep getting errors. Also, I don't understand how to pull in the data via the computed method. Any help would be appreciated.
This is the error I'm getting in the console:
[Vue warn]: The "data" option should be a function that returns a per-instance value in component definitions.
[Vue warn]: $mount() should be called only once.
Here is my app.vue
// app.vue
<style>
.red {
color: #f00;
}
</style>
<template>
<div class="container">
<div class="listings" v-component="listings" v-repeat="listing"></div>
</div>
</template>
<script>
module.exports = {
replace: true,
el: '#app',
components: {
'listings': require('./components/listings.vue')
}
}
</script>
Here is my listings.vue component
<style>
.red {
color: #f00;
}
</style>
<template>
<div class="listing">{{title}} <br> {{description}}</div>
</template>
<script>
module.exports = {
data: {
listing: [
{
title: 'Listing title number one',
description: 'Description 1'
},
{
title: 'Listing title number two',
description: 'Description 2'
}
]
},
// computed: {
// get: function () {
// var request = require('superagent');
// request
// .get('/post')
// .end(function (res) {
// // Return this to the data object above
// // return res.title + res.description (for each one)
// });
// }
// }
}
</script>

The first warning means when you are defining a component, the data option should look like this:
module.exports = {
data: function () {
return {
listing: [
{
title: 'Listing title number one',
description: 'Description 1'
},
{
title: 'Listing title number two',
description: 'Description 2'
}
]
}
}
}
Also, don't put ajax requests inside computed properties, since the computed getters gets evaluated every time you access that value.

Accessing parent functions in QML

I'm currently creating a Twitter client as a way of learning to develop for Blackberry 10. I'm currently trying to create a context menu for a custom ListView item, which on selection will show a dialog in the main layout. However, I cannot get the selected list item to call any functions from the parent Page.
Here is the QML from my custom list item:
import bb.cascades 1.0
Container {
property alias avatar: tracker.imageSource
property alias username: txtTweetUser.text
property alias tweetText: txtTweetContent.text
property alias tweetTime: txtTweetTime.text
signal sendReply(string username)
function cout(text) {
console.debug("[DEBUG] " + text);
}
id: itemTweet
preferredWidth: 768;
preferredHeight: 200
// Actions
contextActions: [
ActionSet {
title: "Action Set"
subtitle: "This is an action set."
actions: [
ActionItem {
title: "Reply"
imageSource: "asset:///reply.png"
onTriggered: {
itemTweet.sendReply(txtTweetUser.text);
}
},
ActionItem {
title: "Retweet"
imageSource: "asset:///retweet.png"
},
ActionItem {
title: "Favourite"
imageSource: "asset:///fav.png"
}
]
} // end of ActionSet
] // end of contextActions list
<Layout for the List Item>...
}
}
And for the main QML file:
import bb.cascades 1.0
TabbedPane {
id: tabbedPane
showTabsOnActionBar: true
Tab {
id: tabTimeline
title: "Timeline"
imageSource: "asset:///twitter-white.png"
Page {
id: pageTimeline
signal openReply
signal showNewTweet
function cout(text) {
console.debug("[DEBUG] " + text);
}
function showTweetWindow(username) {
pageTimeline.dialogNewTweet.text = username;
pageTimeline.dialogNewTweet.visible = true;
}
// Title bar
titleBar: TitleBar {
visibility: Overlay
title: "Twitter"
acceptAction: ActionItem {
id: btnNewTweet
title: "+"
ActionBar.placement: ActionBarPlacement.OnBar
onTriggered: {
pageTimeline.cout("action selected");
dialogNewTweet.visible = true;
}
}
}
// Main content
content: Container {
layout: AbsoluteLayout {}
Container {
// Listview for the tweets
ListView {
id: lstTweets
objectName: "lstTweets"
// Components to display the rows
listItemComponents: [
ListItemComponent {
id: listItem
type: "listItem"
TweetItem {
tweetText: ListItemData.content
tweetTime: ListItemData.time
avatar: ListItemData.avatar
username: ListItemData.username
onSendReply: {
cout("Reply selected in parent to " + username);
pageTimeline.showTweetWindow(username);
}
}
}
]
onSelectionChanged: {
}
function itemType(data, indexPath) {
if (indexPath.length == 1) {
return "header";
} else {
return "listItem";
}
}
}
}
DialogNewTweet {
id: dialogNewTweet
visible: false
onShowNewTweet: {
dialogNewTweet.visible = true;
}
}
}
// End container
}
}
... <Other tabs> ...
}
So when the main QML file receives the SendReply signal, it's suppposed to call showTweetWindow(username) which then makes dialogNewTweet visible, but instead I get the error ReferenceError: Can't find variable: pageTimeline. It's definitely a scope issue, but I can't figure out what I'm doing wrong, or if I need to restructure this.

Answer here:
https://community.blackberry.com/message/182467#182467
What I need to achieve is to operate on a list of data, e.g. delete an item using ContextAction in ListItem in QML, then call a C++ method of an object in QmlDocument's contextProperty. here is how I did it:
C++ code:
QmlDocument *qml = QmlDocument::create("accounts.qml");
root = qml->createRootNode<AbstractPane>();
//Here set the context property, accountsManager was already created
qml->setContextProperty("accountsManager", accountsManager);
//Set the model for the list view
ListView* accountsListView = root->findChild<ListView*>("accountsListView");
accountsListView->setDataModel(accountsManager->getDataModel());
QML code:
Page {
content: Container {
ListView {
id: listView
objectName: "accountsListView"
listItemComponents: [
ListItemComponent {
type: "listItem"
StandardListItem{
id: accountItem
title: ListItemData.username
contextActions: [
ActionSet {
deleteAction: DeleteActionItem {
title: "Delete"
onTriggered: {
//it does not work here, "ReferenceError: Can't find variable: accountsManager"
accountsManager.doSometing();
}
}
}
]
}
}
]
function itemType(data, indexPath) {
return "listItem";
}
} // end of ListView
} // end of Container
actions: [
ActionItem {
title: "Add account"
ActionBar.placement: ActionBarPlacement.OnBar
onTriggered: {
//It works fine here
accountsManager.doSomething();
}
}
]
} // end of Page
And another method:
https://community.blackberry.com/message/453794#453794
At the top Page level add the following line to make the label accessible.
Page {
id: topPage
onCreationCompleted: { Qt.topLabel = topLabel; }
Then in the button definition you can reference the Qt.topLabel from within the list.
listItemComponents: [
ListItemComponent {
type: "item"
Button {
text: "Change To Three"
onClicked: {
Qt.topLabel.text = "Three";
}
}
}
]