Vue2 Search in List received via Axios - vue.js

Question

since filtering is way more complex then in Vue 1, I have a question.
This is my Component, where a list of Sheeps is shown with the option to search/filter on Name or Family.
But I can't figure out how to achieve this.
<input type="search" v-model="search" placeholder="Search for Name OR Family" />
<ul>
<li v-for="sheep in sheeps"> <!-- Tried also: 'sheep in filteredSheeps' -->
{{ sheep.name }} ({{ sheep.type }}/{{ sheep.family }} )
</li>
</ul>
<script>
import axios from 'axios';
export default {
data() {
return {
sheeps: [],
search: '',
};
},
mounted() {
this.getSheeps();
}
methods: {
getSheeps() {
var self = this;
const url = '/api/sheeps';
axios.get(url).then(function(response) {
self.sheeps = response.data;
});
},
},
computed: {
filteredSheeps: function() {
var self = this;
return this.sheeps.filter(function(item) {
return item.family.toLowerCase().indexOf(self.search.toLowerCase()) > -1
})
}
}
}
}
</script>
I thought that it needed the computed method filteredSheeps in the v-for, but that's not it either. Getting an error directly then:
TypeError: null is not an object (evaluating 'item.family.toLowerCase')"

Answer 1

Here is a computed that will protect you from cases where the family and/or name is not populated.
filteredSheeps: function() {
let searchTerm = (this.search || "").toLowerCase()
return this.sheeps.filter(function(item) {
let family = (item.family || "").toLowerCase()
let name = (item.name || "").toLowerCase()
return family.indexOf(searchTerm) > -1 || name.indexOf(searchTerm) > -1
})
}
And a working example.
console.clear()
const sheeps = [
{name: "Lily", type: "Dorper", family: "Family 1"},
{name: "Joe", type: "Merino", family: "Family 2"},
{name: "Bob", type: "Dorper", family: null},
]
new Vue({
el: "#app",
data:{
sheeps:[],
search: null
},
computed: {
filteredSheeps: function() {
let searchTerm = (this.search || "").toLowerCase()
return this.sheeps.filter(function(item) {
let family = (item.family || "").toLowerCase()
let name = (item.name || "").toLowerCase()
return family.indexOf(searchTerm) > -1 || name.indexOf(searchTerm) > -1
})
}
},
created(){
setTimeout(() => this.sheeps = sheeps, 500)
}
})
<script src="https://unpkg.com/vue#2.4.2"></script>
<div id="app">
<input type="search" v-model="search" placeholder="Search for Name OR Family" />
<ul>
<li v-for="sheep in filteredSheeps">
{{ sheep.name }} ({{ sheep.type }}/{{ sheep.family }} )
</li>
</ul>
</div>