将方法中的字段名称分配给Firestore文档

Question

Let's say I have a collection called 'users'. When someone clicks the upvote button, I want it to update the user document with an entry that's the slug from the page they are viewing. However, I'm not sure how to accomplish it using the code I have.

voteUp() {
        const voteup_ref = db.collection("builds").doc(this.$route.params.slug)
        const voteuser_ref = db.collection("users").doc(this.alias)
        return db.runTransaction(t => {
          return t.get(voteup_ref).then(doc => {
            const newCount = doc.data().voteup + 1
            const NewSlug = voteuser_ref
            t.update(voteup_ref, {
              voteup: newCount
            })
            t.update(voteuser_ref, {
              NewSlug: 'voteup'
            })
          });
        })
      },

So, if someone is viewing a page with the slug of 'my-awesome-comment', I want 'my-awesome-comment' to be entered in the user's document with a value of "voteup".

What's actually happening is that it will write an entry to the user document as I expect, but it's entering the field name as 'NewSlug' with a value of "voteup" instead of whatever the slug actually is.

What am I doing wrong?

Answer 1

The way you've written the JSON object NewSlug itself is the property name, instead of using its value. To do the latter, you need to use square bracket notation ( [] ):

let update = {};
update[NewSlug] = 'voteup';
t.update(voteuser_ref, update)