PubSub Subscription error with REPEATED Column Type - Avro Schema - publish-subscribe

Question

I am trying to use the PubSub Subscription "Write to BigQuery" but am running into an issue with the "REPEATED" column type. the message I get when update the subscription is
Incompatible schema mode for field 'Values': field is REQUIRED in the topic schema, but REPEATED in the BigQuery table schema
My Avro Schema is:
{
"type": "record",
"name": "Avro",
"fields": [
{
"name": "ItemID",
"type": "string"
},
{
"name": "UserType",
"type": "string"
},
{
"name": "Values",
"type": [
{
"type": "record",
"name": "Values",
"fields": [
{
"name": "AttributeID",
"type": "string"
},
{
"name": "AttributeValue",
"type": "string"
}
]
}
]
}
]
}
Input JSON That "Matches" Schema:
{
"ItemID": "Item_1234",
"UserType": "Item",
"Values": {
"AttributeID": "TEST_ID_1",
"AttributeValue": "Value_1"
}
}
my Table looks like:
ItemID | STRING | NULLABLE
UserType | STRING | NULLABLE
Values | RECORD | REPEATED
AttributeID | STRING | NULLABLE
AttributeValue | STRING | NULLABLE
I am able to "Test" and "Validate Schema" and it comes back with a success. Question is, what am I missing on the Avro for the Values node to make it "REPEATED" vs "Required" for subscription to be created.

Answer 1

The issue is that Values is not an array type in your Avro schema, meaning it expects only one in the message, while it is a repeated type in your BigQuery schema, meaning it expects a list of them.

Answer 2

Per Kamal's comment above, this schema works:
{
"type": "record",
"name": "Avro",
"fields": [
{
"name": "ItemID",
"type": "string"
},
{
"name": "UserType",
"type": "string"
},
{
"name": "Values",
"type": {
"type": "array",
"items": {
"name": "NameDetails",
"type": "record",
"fields": [
{
"name": "ID",
"type": "string"
},
{
"name": "Value",
"type": "string"
}
]
}
}
}
]
}
the payload:
{
"ItemID": "Item_1234",
"UserType": "Item",
"Values": [
{ "AttributeID": "TEST_ID_1" },
{ "AttributeValue": "Value_1" }
]
}