Vue.js filtering on array - arrays

Question

I am trying to filter an array using a computed property in vue.js. I would like to search on on multiple fields, name, state, tags etc.
My data:
events: [
{
id: 1,
name: 'Name of event',
url: '#',
datetime: '2017-05-10T00:00:00Z',
description: 'The full text of the event',
state: 'VIC',
tags: [
'ordinary',
'advanced'
]
},
{
id: 2,
name: 'Another event',
url: '#',
datetime: '2017-05-12T00:00:00Z',
description: 'The full text of the event',
state: 'VIC',
tags: [
'beginner'
]
},
{
id: 3,
name: 'Great event',
url: '#',
datetime: '2017-05-18T00:00:00Z',
description: 'The full text of the event',
state: 'NSW',
tags: [
'beginner'
]
}
]
},
The following function works as expected, however I cant work out how to have it search the items in 'tags' (commented out).
searchevents: function(){
let result = this.events
if (this.filterValue){
result = result.filter(event =>
event.name.toLowerCase().includes(this.filterValue.toLowerCase()) ||
event.state.toLowerCase().includes(this.filterValue.toLowerCase())
// event.tags.toLowerCase().values().includes(this.filterValue.toLowerCase())
)
}
return result
}
The following returns a blank array, this method works ok when i have done it in angular but not in vue.
searchevents2: function(){
var searchRegex = new RegExp(this.filterValue,'i')
this.events.filter(function(event){
return !self.filterValue || searchRegex.test(event.name) || searchRegex.test(event.state)
})
}
Ideally I would either like to be able to list array items to filter by or just filter by the entire array.
Appreciate any help, first post here so be gentle. I have a lot more experience with Python than Javascript so i may also use incorrect terminology at times.

Answer 1

You weren't too far off.
For your searchEvents filter, you just needed to add the tag filter. Here's how you might do that.
searchevents: function(){
let result = this.events
if (!this.filterValue)
return result
const filterValue = this.filterValue.toLowerCase()
const filter = event =>
event.name.toLowerCase().includes(filterValue) ||
event.state.toLowerCase().includes(filterValue) ||
event.tags.some(tag => tag.toLowerCase().includes(filterValue))
return result.filter(filter)
}
Array.some() is a standard array method that returns true if any element of the array passes your test.
searchevents2: function(){
const searchRegex = new RegExp(this.filterValue,'i')
return this.events.filter(event =>
!this.filterValue || searchRegex.test(event.name) || searchRegex.test(event.state))
}
With searchEvents2 you really only left an errant self in there. Either you needed to set self before you executed the filter, or, as I have done here, turned it into an arrow function.
Example.

Answer 2

const app = new Vue ({
el: '#app',
data: {
search: '',
userList: [
{
id: 1,
name: "Prem"
},
{
id: 1,
name: "Chandu"
},
{
id: 1,
name: "Shravya"
}
]
},
computed: {
filteredAndSorted(){
// function to compare names
function compare(a, b) {
if (a.name < b.name) return -1;
if (a.name > b.name) return 1;
return 0;
}
return this.userList.filter(user => {
return user.name.toLowerCase().includes(this.search.toLowerCase())
}).sort(compare)
}
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.4.2/vue.js"></script>
<div id="app">
<div class="search-wrapper">
<input type="text" v-model="search" placeholder="Search title.."/>
<label>Search Users:</label>
</div>
<ul>
<li v-for="user in filteredAndSorted">{{user.name}}</li>
</ul>
</div>