how can I update a vue child-component from the vuex-store - vue.js

Question

My application shows a window where player can enter name and passcode to enter
When the player exists and has a card, I want to show the card as well.
When the player exists, I make the card visible. Then in 'created'I call fetchSpelerCards. This is successful but shows in the VUE console as pending...
I hope some experienced vue user reads this and can help me with a hint, reference or explanation.
For that I have in the following code:
<h2>Meld je aan</h2>
<form #submit.prevent="register" class="mb-3">
<div class="form-group">
<input type="text" class="form-control m-2" placeholder="naam" v-model="name">
</div>
<div class="form-group">
<input type="text" class="form-control m-2" placeholder="kies inlogcode" v-model="pass_code">
</div>
<button type="submit" #click="checkSpeler()" class="btn btn-primary btn-block" style="color:white">Save</button>
</form>
<p class="alert alert-danger" v-if="errorMessage !== ''"> {{errorMessage}} </p>
<p class="alert alert-success" v-if="successMessage !== ''"> {{successMessage}} </p>
<CardsSpeler v-if="spelerCorrect"></CardsSpeler>
</div>
</template>
The component looks as follows:
<h2>Cards 1</h2>
<form #submit.prevent="addCard" class="mb-3">
<div class="form-group">
<input type="text" class="form-control" placeholder="title" v-model="card.title">
</div>
<div class="form-group">
<textarea class="form-control" placeholder="description" v-model="card.description">
</textarea>
</div>
<div>
<input type="file" v-on:change="onFileChange" ref="fileUpload" id="file_picture_input">
</div>
<button type="submit" class="btn btn-primary btn-block" style="color:white">Save</button>
</form>
<div class="card card-body mb-2" v-for="card in cards" v-bind:key="card.id">
<h3> {{currentSpelerCard.title}} </h3>
<p> {{currentSpelerCard.description}}</p>
<img class="img-circle" style="width:150px" v-bind:src="currentSpelerCard.picture" alt="Card Image">
</div>
</div>
</template>
<script>
import { mapState, mapActions } from 'vuex';
export default {
mounted(){
console.log('component mounted');
},
computed: {
...mapState([
'currentSpeler' ,'currentSpelerCard'
]),
},
data() {
return{
cardExists:false,
successMessage:'',
errorMessage:'',
}
},
created(){
this.fetchSpelerCards();
},
methods: {
...mapActions([ 'getGames', 'addGame', 'fetchSpelerCards' ]),
fetchSpelerCards(){
this.$store.dispatch('fetchSpelerCards', this.currentSpeler.speler.id )
.then(res => {
this.cardExists = true;
this.successMessage = res;
console.log(res);
})
.catch(err => {
this.errorMessage = err;
this.cardExists = false;
});
},
The corresponding action, in actions.js is:
export const fetchSpelerCards = ({commit}, speler_id) => {
return new Promise((resolve, reject) => {
let status = '';
let data ={};
fetch(`api/cardsBySpeler/${speler_id}`)
.then(res => {
status = res.status;
data = res.json();
})
.then(res=>{
if ( status === 200) {
commit('SET_PLAYER_CARD', data);
resolve('Kaart gevonden');
}
else {
reject('Er is geen kaart beschikbaar')
}
});
})
}
In the vuex-store I see (viewed with VUE add-on of chrome browser):
currentSpelerCard: Promise
Yet, the response of the fetch command was successful, and the card was pulled in, as I see also in the console: status 200, I can see name, title, image address etc..
I was under the assumption that, when the promise eventually resolves, the store is updated and the card becomes available because of the:
computed: { ...mapState([ 'currentSpeler' ,'currentSpelerCard' ]),
Can anyone help me and explain what I am doing wrong?

Answer 1

fetchSpelerCards in Vuex commits SET_PLAYER_CARD with data, this will be a pending promise. You need to await the promise.
You can solve this in a few different ways.
Making the function async and await res.json() would be the easiest.
...
fetch(`api/cardsBySpeler/${speler_id}`)
.then(async res => {
status = res.status;
data = await res.json();
})
...