require_matching_changeset_version.rb

require "bundler/inline"

gemfile do
  gem "graphql", "2.5.13"
  gem "graphql-enterprise", source: "https://gems.graphql.pro"
end

class MySchema < GraphQL::Schema
  class ExampleChangeset < GraphQL::Enterprise::Changeset
    release("2025-01-01")
  end

  class BaseField < GraphQL::Schema::Field
    include GraphQL::Enterprise::Changeset::FieldIntegration
  end

  class Query < GraphQL::Schema::Object
    field_class(BaseField)
    field :int, Integer, fallback_value: 1, added_in: ExampleChangeset
  end

  query(Query)
  use GraphQL::Enterprise::Changeset::Release, changesets: [ExampleChangeset]


  module RequireMatchingVersion
    # This is a static set of all released changeset versions.
    # Depending on how your app is set up, you might not be able to
    # assign it to a constant (eg if the changeset releases haven't been set up yet).
    # In that case, you could move this to `def execute_query`
    # And do a `.any?` check instead of creating a Set.
    ALL_RELEASES = Set.new(MySchema.changesets.map(&:release))

    def execute_query(query:)
      requested_version = query.context[:changeset_version]
      if requested_version && !ALL_RELEASES.include?(requested_version)
        message = "Schema version #{requested_version.inspect} not found. Please use a published version number and try again."
        query.context.response_extensions["warning"] = message
        # Or raise:
        # raise GraphQL::ExecutionError, message
      end
      yield
    end
  end

  trace_with RequireMatchingVersion
end

pp MySchema.execute("{ int }", context: { changeset_version: "2025-01-01"} ).to_h
# {"data" => {"int" => 1}}

pp MySchema.execute("{ int }", context: { changeset_version: "2025-10-01"} ).to_h
# {
#   "data" => {"int" => 1},
#   "extensions" => {
#     "warning" => "Schema version \"2025-10-01\" not found. Please use a published version number and try again."
#    }
#  }