Array of Maps Schema Example

[READ] Step 1: Are you in the right place?

Issues filed here should be about a feature request for a specific extension in this repository. To file a feature request that affects multiple extensions or the Firebase Extensions platform, please reach out to Firebase support directly.

[REQUIRED] Step 2: Extension name

This feature request is for extension: _ (firestore-bigquery-export)

What feature would you like to see?

Please provide a schema example for an array of Maps in the GENERATE_SCHEMA_VIEWS.md

How would you use it?

To enable breaking out of data stored as an array of maps.

[hernantz]

Hi @pauhlbarnes and @dackers86 I’m facing a similar issue, given this JSON structure

{
    "user": "foo",
    "friends": [
            {
                  "firstName": "John",
                  "lastName": "Doe"
            },
            {
                  "firstName": "Jane",
                  "lastName": "Doe"
            } 
    ]
}

This schema representation won’t work, right?

{
    "fields": [
       {
            "name": "user",
            "type": "string"
        },
        {
            "name": "friends",
            "type": "map",
            "mode": "repeated",
            "fields": [
                {
                  "name": "firstName",
                  "type": "string"
                }, 
                {
                  "name": "lastName",
                  "type": "string"
                }
            ]
        }
    ]
}

Or at least this is what I understand from this comment from https://github.com/firebase/extensions/issues/583. Although it would seem to be possible to implement, according to the BigQuery docs on nested structs.

[dackers86]

HI @darnmason @darnmason

I’ve added this to our project board for further investigation.