How to refer one avro schema inside another one - avro

Question

I need to refer to this Student schema from inside another schema:
{
"type": "record",
"namespace": "data.add",
"name": "Student",
"fields": [
{
"name": "Name",
"type": "string"
},
{
"name": "Age",
"type": "int"
}
]
}
This is the parent Address schema which needs to refer to Student:
{
"type": "record",
"namespace": "data.add",
"name": "Address",
"fields": [
{
"name": "student",
"type": "Student"
}
]
}
The above throws an error when I build using Gradle with the Avro plugin. Both schemas are located in the same folder.

Answer 1

Sorry if I'm too late to the party, but it looks to me like both the maven avro plugin and the avro-tools compiler do not determine dependency order when loading, but will succeed if you order them yourself on the commandline. I have an example demonstrating this from your sample files in a standard maven directory structure.
When I put the schema with no dependencies first in the commandline, it succeeds:
java -jar /path/to/avro-tools-1.11.0.jar \
compile schema \
src/main/avro/student.avsc \
src/main/avro/address.avsc \
target/generated-sources/avro
ls target/generated-sources/avro/data/add/*
target/generated-sources/avro/data/add/Address.java target/generated-sources/avro/data/add/Student.java
When I put the schema with dependencies first in the commandline, it fails:
java -jar /path/to/avro-tools-1.11.0.jar \
compile schema \
src/main/avro/address.avsc \
src/main/avro/student.avsc \
target/generated-sources/avro
Exception in thread "main" org.apache.avro.SchemaParseException: "data.add.Student" is not a defined name. The type of the "student" field must be a defined name or a {"type": ...} expression.
at org.apache.avro.Schema.parse(Schema.java:1676)
at org.apache.avro.Schema$Parser.parse(Schema.java:1433)
at org.apache.avro.Schema$Parser.parse(Schema.java:1396)
at org.apache.avro.tool.SpecificCompilerTool.run(SpecificCompilerTool.java:154)
at org.apache.avro.tool.Main.run(Main.java:67)
at org.apache.avro.tool.Main.main(Main.java:56)

Answer 2

This was successful:
{
"type" : "record",
"namespace" : "data.add",
"name" : "Address",
"fields" : [
{
"name": "student",
"type": "data.add.Student"
}
]
}