CODEWITHSUNDEEP
reactjsfirebasegoogle-cloud-firestore
Aw KingOftheworld
Aw KingOftheworld

Reputation: 151

firebase delete object from field array by index

How to delete object from array field by array index? or suggest another way!

i want to choose object from files array and delete! enter image description here

Upvotes: 1

Views: 240

Answers (1)

Nimna Perera
Nimna Perera

Reputation: 1065

There is no choose and delete method from an array in cloud firestore. What you can do is get that array to a temporary array and remove the object that you need to delete from the array and overwrite the document array field with your newly updated temporary array.

const deleteObjFromArr = async (index) => {
    try {
        /*
         * Get the files array to a temporary array.
         * If you have already gotten the document to an object,
         * assign the object field to the temporary array
         */
        
        const docRef = firebase.firestore().collection('tasks-collection').doc('tasks');
        const tempArr = (await docRef.get()).files;
        
        // Remove object from array
        tempArr.splice(index, 1);
        
        // Save new array in cloud firestore
        await docRef.update({ files: tempArr });
        console.log('Files array updated successfully');
        
    } catch (err) {
        console.log('Error occured. Operation terminated.');
        console.log(err);
    }
}

Upvotes: 1

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