Google Firebase seems to be difficult to wrap my head around... I have no problems in getting documents and their data out of a collection, but when I try to simply get a list of all the IDs inside a collection, I am not able to figure out what the call should look like. I have tried searching for the info, but without success.

I have a function declared in my service ponent, which looks like this:

getCollRegistrationNumbers(): firebase.firestore.CollectionReference {
  return firebase.firestore().collection(`storedItems`);
}

Then in e.g. the Search page of my app, I am calling the function from my ponent, but whatever I try, it returns empty.

Given the service function above, how should I plete the code below to just git a list of the IDs?

this.fireStore.getCollRegistrationNumbers().get()
  .then(snapshot => {....})

Google Firebase seems to be difficult to wrap my head around... I have no problems in getting documents and their data out of a collection, but when I try to simply get a list of all the IDs inside a collection, I am not able to figure out what the call should look like. I have tried searching for the info, but without success.

I have a function declared in my service ponent, which looks like this:

getCollRegistrationNumbers(): firebase.firestore.CollectionReference {
  return firebase.firestore().collection(`storedItems`);
}

Then in e.g. the Search page of my app, I am calling the function from my ponent, but whatever I try, it returns empty.

Given the service function above, how should I plete the code below to just git a list of the IDs?

this.fireStore.getCollRegistrationNumbers().get()
  .then(snapshot => {....})

• javascript
• firebase
• google-cloud-platform
• google-cloud-firestore

Share Follow edited Aug 10, 2023 at 17:43 Renaud Tarnec 83.2k1010 gold badges9898 silver badges129129 bronze badges Recognized by Google Cloud Collective asked Nov 5, 2018 at 17:02 NorthFredNorthFred 50033 gold badges88 silver badges2626 bronze badges 1

• Can anybody tell How we can query and get this middle collection/ids so we can query next subcollection by ids ? – Ashish Gehlot Commented Jan 17, 2021 at 6:38

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1 Answer 1

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Look at how your documents are displayed in an italic font: this means, in the console, that these documents are only present as "container" of one or more sub-collection but that they are not "genuine" documents.