How to assign mapState list of data? - vue.js

Question

Currently, I am working on apex bar chart, wanted to assign list of mapState data into apex series data.
Below is the code:
<script>
import { mapState } from 'vuex';
export default {
data: () => ({
series: [{
name: 'Completed',
data: [44, 55, 57, 58, 56, 61, 58, 63, 60, 66, 67, 62]
}, {
name: 'Total',
data: [100, 90, 101, 100, 98, 87, 105, 97, 114, 94, 112, 100]
}]
}),
computed: {
...mapState(['userAssignmentProgessTotal','userAssignmentProgessCompleted']),
},
}
</script>
mapState value:
userAssignmentProgessTotal: [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
userAssignmentProgessCompleted: [45, 29, 32, 17, 1, 13, 12, 10, 8, 8, 8, 8]
And I wanted to assign like below:
series: [{
name: 'Completed',
data: this.userAssignmentProgessTotal
}, {
name: 'Total',
data: this.userAssignmentProgessCompleted
}]
but getting error as:
Error in data(): "TypeError: Cannot read property 'userAssignmentProgessTotal' of undefined"
I am very new to vuex as well as vuejs. Apologies if I haven't described well. Thanks
Screenshot:

Answer 1

[1] If you want the series to be reactive ie. keep changing / updating when
userAssignmentProgessTotal or userAssignmentProgessCompleted
changes, make series a computed property instead of data property
import { mapState } from 'vuex';
export default {
computed: {
...mapState([
'userAssignmentProgessTotal',
'userAssignmentProgessCompleted'
]),
series () {
return [{
name: 'Completed',
// If `userAssignmentProgessTotal` is any falsy value it will return the default array else will return `userAssignmentProgessTotal`
data: this.userAssignmentProgessTotal || [44, 55, 57, 58, 56, 61, 58, 63, 60, 66, 67, 62]
}, {
name: 'Total',
data: this.userAssignmentProgessCompleted || [100, 90, 101, 100, 98, 87, 105, 97, 114, 94, 112, 100]
}]
}
}
}
[2] If you want to manually update series, make a method to update
series
import { mapState } from 'vuex';
export default {
data () {
return {
series () {
return [{
name: 'Completed',
data: [44, 55, 57, 58, 56, 61, 58, 63, 60, 66, 67, 62]
}, {
name: 'Total',
data: [100, 90, 101, 100, 98, 87, 105, 97, 114, 94, 112, 100]
}]
}
}
},
computed: {
...mapState([
'userAssignmentProgessTotal',
'userAssignmentProgessCompleted'
])
},
methods: {
updateSeries () {
this.$set(this.series, 0, { name: this.series[0].name, data: this.userAssignmentProgessTotal })
this.$set(this.series, 1, { name: this.series[1].name, data: this.userAssignmentProgessCompleted })
}
},
mounted () {
// call dispatches to fetch data
// ...
// call the method in mounted to update series when component loads
// or else whenever you want to update series
this.updateSeries()
}
}