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---
layout: guide
doc_stub: false
search: true
section: Queries
title: Logging
desc: Development output from GraphQL-Ruby
index: 12
---
At runtime, GraphQL-Ruby will output debug information using {{ "GraphQL::Query.logger" | api_doc }}. By default, this uses `Rails.logger`. To see output, make sure `config.log_level = :debug` is set. (This information isn't meant for production logs.)
You can configure a custom logger with {{ "GraphQL::Schema.default_logger" | api_doc }}, for example:
```ruby
class MySchema < GraphQL::Schema
# This logger will be used by queries during execution:
default_logger MyCustomLogger.new
end
```
You can also pass `context[:logger]` to provide a logger during execution.
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