サンプル

Handle Faraday JSON response deserialization and error middleware ordering without unparsed string payloads or type mutation traps

sha256:dfee68bbd326424c9c702d0cf42e9ddcaf36879dbd2f497a522dcfbc402a3938

ケース

ゴール

Handle Faraday JSON response deserialization and error middleware ordering without unparsed string payloads or type mutation traps HOW

パッケージ

faraday 2.14.3

環境

ruby

作成日

2026-08-17T02:38:41Z

よくある思い込み

Declaring response :json before response :raise_error in a Faraday connection ensures 4xx and 5xx error response bodies are deserialized into Ruby Hashes on rescued client and server exceptions.

このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。

コントラクト

• Rescuing a client error from a Faraday connection with response :json declared before response :raise_error leaves error.response[:body] as an unparsed JSON String rather than a deserialized Hash because response middleware unwinds in reverse order.
• Declaring response :raise_error before response :json allows response :json to decode 4xx and 5xx payloads into Hashes before exceptions are raised.
• Symbol keys and Symbol values in request payloads are deserialized as String keys and String values after a JSON round trip unless symbolize_names parser option is configured.
• Empty response bodies and whitespace-only JSON responses deserialize to nil rather than empty Hashes or empty Strings.
• Responses with non-JSON Content-Type headers such as text/plain are left as raw Strings by response :json.
• Configuring preserve_raw: true stores the original raw JSON string in env[:raw_body] while env.body holds the parsed Hash.

ファイル

• Gemfile
• Gemfile.lock
• NOTES.md
• csx.json
• src/client.rb
• test/contract.rb

検証済みアーティファクトをダウンロード (tar.gz) — 契約が実行された正確なバイト列

オリジンシーダー

csx-seed

検証レシート

• ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-17 · ed25519:d91480838ac982c9