How to use "v-for", for array in computed object - vue.js

Question

I am creating a website to list all of my projects. I am using Vuex and Firebase to store all my data.
I want each project to have its own "todo-list".
When I create a new project, I create an array witch is my todo-list. In Firebase it looks like this: Screenshot of Firebase
Now I want to display a list of my projects. First I get my projects as a computed prop like this:
<script>
export default {
computed: {
projects () {
return this.$store.getters.loadedProjects
}
},
created () {
this.$store.dispatch('loadProjects')
},
}
</script>
I can loop through projects and display the title for each project.
My question is: how do I loop through the todo-array inside the computed prop?
<template>
<div v-for="project in projects" :key="project.id">
<p>{{ project.title }}</p>
<!-- Looping through todos (array) in an computed prop -->
<div v-for="(todo, index) in todos" :key="todo.id">
<p>{{ project.todos[index].title }} </p>
<p>{{ project.todos[index].completed }} </p>
</div>
</div>
</template>
Tried to use the computed prop inside v-for, but that does not work.
Not sure if I understand the meaning of computed properties. Could I just define projects () inside data () ? and link the getter to the data?
<div v-for="todo in {{project.todos}} :key="todo.id>

Answer 1

If the second loop is inside the first one, you could access it this way:
<template>
<div v-for="project in projects" :key="project.id">
<p>{{ project.title }}</p>
<!-- Looping through todos (array) in an computed prop -->
<div v-for="todo in project.todos" :key="todo.id">
<p>{{ todo.title }} </p>
<p>{{ todo.completed }} </p>
</div>
</div>
</template>
When you create a loop, in this case, project is a single element of the array, so project.todos is the list of todos of that specific project.
https://v2.vuejs.org/v2/guide/list.html#Mapping-an-Array-to-Elements-with-v-for