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VisualizaçõesGet map key name and values stored on array from firestore
I'm trying to get the values from a map and store it in an array from firestore using react native. This is an example of how I would like the array to look, after the map gets pulled.
const [food, setFood] = useState([
{Food: 'Cheese', Calories: 20, Quantity: 1, key: '1'},
{Food: 'Lettuce', Calories: 10, Quantity: 1, key: '2'},
]);
Here is the stored data in firestore:
For getting the data and other fields from firestore I'm using this function:
const getFoodData = async () =>{
const docRef = doc(db, "foods", uid);
const docSnap = await getDoc(docRef);
if (docSnap.exists()) {
console.log("Document data:", docSnap.data());
} else {
console.log("No such document!");
}
setFood(docSnap.get("Food.Cheese.Calories"))
console.log(food)
}
I'm able to get the value from an individual field by doing the above, but I need to have it stored in an array, like the first example. how would I be able to do that?
·
Juan Pablo Isaza
2 Respostas
Responde à pergunta0
You can try using Object.keys() and then use a map as shown below:
const foodMap = docSnap.data().Food
const result = Object.keys(foodMap).map(key => ({ food: key, ...foodMap[key] }))
·
Juan Pablo Isaza
Relatório
0
Great answer, Dharmaraj.
Adding code snippet so you can see it in action -
// Food is the result of doc.data().food
const food = {
Cheese: { Calories: 20, Quantity: 1, key: '1'},
Lettuce: { Calories: 10, Quantity: 1, key: '2'},
};
console.log('Firestore Data: ', food)
const result = Object.keys(food).map(key => ({ food: key, ...food[key]}))
console.log('Flattened result: ', result)
·
Juan Pablo Isaza
Relatório
Responde à pergunta