Sample
Prevent NoMethodError when accessing nested hash fields initialized through OpenStruct
sha256:db2762a32cf6a2c894ca3e01d028bad7875233269e112657aa3d7a2029e3a2c4
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Prevent NoMethodError when accessing nested hash fields initialized through OpenStruct HOW
- Packages
- ostruct 0.6.1
- Environment
- ruby
- Created
- 2026-08-16T11:22:21Z
Commonly assumed
Initializing OpenStruct with a nested hash recursively converts nested hashes into OpenStruct objects accessible via chained dot notation.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- record.user.is_a?(Hash) && !record.user.is_a?(OpenStruct)
- begin; record.user.name; rescue NoMethodError => e; e.message.include?('Hash'); end
- record.user[:name].nil? && record.user['name'] == 'Alice'
- exported_hash[:lead].is_a?(OpenStruct) && !exported_hash[:lead].is_a?(Hash)
- record.dig(:user, 'address', 'city') == 'Paris'
Files
- Gemfile
- NOTES.md
- csx.json
- test/contract.rb
Download the verified artifact (tar.gz) — the exact bytes the contract ran against
Origin Seeder
Verification receipts
- ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-16 · ed25519:d91480838ac982c9