GitHub user tjwp opened a pull request:
https://github.com/apache/avro/pull/170
Add schema compatibility checker for Ruby
This change introduces a module `Avro::SchemaCompatibility` to perform a
full compatibility check between two schemas in Ruby. This compatibility check
extends the existing schema matching implemented in
`Avro::IO::DatumReader.match_schemas`. The implementation of the
`.match_schemas` class method has been moved to the new module and is called as
part of the full compatibility check.
`#read?`, `#be_read?` and `#mutual_read?` methods have been added to
`Avro::Schema` as a way to invoke the new compatibility checks. A `#default?`
method has been added to `Field` to determine if a field has a default.
Tests for the new module were based on the test cases from:
-
lang/java/avro/src/test/java/org/apache/avro/io/parsing/TestResolvingGrammarGenerator2.java
- lang/java/avro/src/test/java/org/apache/avro/TestSchemaCompatibility.java
Additional fixes included:
- support for empty records and empty unions in Ruby (these were useful to
demonstrate test parity for compatibility checking)
- schema promotion between bytes and strings in `.match_schemas`
- schema promotion within complex types in `.match_schemas`, e.g. an array
of ints promoted to an array of longs
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/salsify/avro compatibility_validator
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/avro/pull/170.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #170
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commit c404846078507405220f4862e72ccca034bfcfd4
Author: Tim Perkins <[email protected]>
Date: 2016-12-15T14:35:21Z
Add schema compatibility checker for Ruby
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