How to delete document from firestore using where clause

Question

var jobskill_ref = db.collection('job_skills').where('job_id','==',post.job_id); jobskill_ref.delete(); 

Error thrown

jobskill_ref.delete is not a function

Answer 1

You can only delete a document once you have a DocumentReference to it. To get that you must first execute the query, then loop over the QuerySnapshot and finally delete each DocumentSnapshot based on its ref.

var jobskill_query = db.collection('job_skills').where('job_id','==',post.job_id); jobskill_query.get().then(function(querySnapshot) {   querySnapshot.forEach(function(doc) {     doc.ref.delete();   }); }); 

Answer 2

I use batched writes for this. For example:

var jobskill_ref = db.collection('job_skills').where('job_id','==',post.job_id); let batch = firestore.batch();  jobskill_ref   .get()   .then(snapshot => {     snapshot.docs.forEach(doc => {       batch.delete(doc.ref);     });     return batch.commit();   }) 

ES6 async/await:

const jobskills = await store   .collection('job_skills')   .where('job_id', '==', post.job_id)   .get();  const batch = store.batch();  jobskills.forEach(doc => {   batch.delete(doc.ref); });  await batch.commit();