I have an object that contains pairs of data that I would like to display based on category. I believe this has to do with nested v-for loops, but I'm having trouble figuring out the right way to go about this.
categoryArray = {stage 1, red}, {stage 1, blue}, {stage 2, orange}, {stage 3, brown}, {stage 2, green}
Desired display: Stage 1: red, blue Stage 2: orange Stage 3: brown
I do not have workable code yet. My strategy has been to create an array of unique Stages, use that to display the Stages, but I can't figure out how to iterate the items within the stages.
Getting the stages:
let stagesArray = [];
categoryArray.value.forEach((entry, index) => {
stagesArray.push(entry.stageNumber);
});
//creating array of unique stages
uniqueRooms.value = [...new Set(stagesArray)];
})
The above works to get the unique array of rooms.
<template>
<div v-for="(stage, index) in uniqueRooms" :key="index">
{{ room }}
<div v-for="(color, index) in filterStages" :key="index">
{{ color }}
</div>
</div>
</template>
<script>
//this is a mess and I don't know where to go.
const filterStages = computed(function (stage) {
return stagesUnique.value.forEach((stageNumber) => {
return categoriesArray.value.filter((color) => color.stage
=== stageNumber);
});
</script>
I am out over my skiis. I just need some leads on how to loop through the main category(stage), with unique values, and then display all matching colors within that category.
This seems very close, but I can't figure out the way to get unique stages from this. Nested loop in Vue
Is this what you're looking for?
const { createApp, computed } = Vue;
createApp({
setup() {
const data = [
{ stage: 1, color: 'red' },
{ stage: 1, color: 'blue' },
{ stage: 2, color: 'orange' },
{ stage: 3, color: 'brown' },
{ stage: 2, color: 'green' }
];
const stages = computed(
() => [...new Set(data.map(({ stage }) => stage))]
);
const stageColors = computed(
() => s => data.filter(({ stage }) => stage === s)
.map(({ color }) => color)
);
return {
stages,
stageColors
}
}
}).mount('#app');h4 { margin-bottom: 0;}<script src="https://unpkg.com/vue@next/dist/vue.global.prod.js"></script>
<div id="app">
<div v-for="stage in stages" :key="stage">
<h4>Stage #{{ stage }}</h4>
<ul>
<li v-for="color in stageColors(stage)" :key="color" v-text="color" />
</ul>
<hr>
</div>
</div>You have the same index for both loops, so it's wrong
<div v-for="(stage, index) in uniqueRooms" :key="index">
----
{{ room }}
<div v-for="(color, index) in filterStages" :key="index">
-----