Config Reference

Here’s a list of the available config settings.

Name Description Default
project_name Jets project name generated as part of jets new
cors Enable cors false
autoload_paths Customize autoload paths. Add extra paths you want to Jets autoload. []
ignore_paths Customize ignore paths. These paths will be ignored by the autoloader. []
logger Jets logger$stderr)
time_zone Time zone UTC
function.timeout Lambda function default timeout 30
function.memory_size Lambda function default memory size 1536
function.ephemeral_storage.size Lambda function default size of the /tmp directory in megabytes 512
prewarm.enable Enable prewarming noop call. true
prewarm.rate Prewarming Rate 30 minutes
prewarm.concurrency Prewarning concurrency 2
prewarm.public_ratio Prewarming public ratio 3
prewarm.rack_ratio Prewarming rack ratio 5
gems.disable Disable use of Serverless Gems service. Note, this means you must build a custom lambda layer yourself. false
gems.source Default gems source
gems.clean Whether or not to always rebuild binary gems in the cache folder. false
inflections.irregular Special case inflections {}
assets.folders Folders to assets package and upload to s3 %w[assets images packs]
assets.base_url Base url to use to serve assets. IE: By default this is the s3 website url that jets manages. nil
assets.max_age Default max age on assets 3600
assets.cache_control The cache control expiry. IE: public, max-age=3600. Note, assets.max_age is a shorter way to set cache_control. nil
assets.webpacker_asset_host Default uses the s3 endpoint url. You can set an explicit value if you need to override. Also if assets.base_url is use, that will be used. Precedence: 1. assets.webpacker_asset_host 2. assets.base_host 3. s3_endpoint s3_endpoint Session storage. Note when accessing it use session[:store] since .store is an OrderedOptions method. Rack::Session::Cookie
session.options Session storage options {}
api.auto_replace Whether or not to auto replace the API Gateway when necessary. By default, will prompt user. Setting this to true bypasses the prompt. Note changing the API Gateway will change the endpoint. It’s recommended to set up a custom domain which is updated with the new API Gateway endpoint automatically. nil
api.authorization_type API Gateway default authorization_type NONE
api.cors_authorization_type API Gateway default authorization_type for CORS. Note, default is nil so ApiGateway::Cors#cors_authorization_type handles. nil
api.binary_media_types Content types to treat as binary [‘multipart/form-data’]
api.endpoint_type Endpoint type. IE: PRIVATE, EDGE, REGIONAL EDGE
api.endpoint_policy Note, required when endpoint_type is EDGE nil
api.api_key_required Whether or not to require API key false
api.authorizers.default_token_source This the header to look for and use in the method.request.header. IE: method.request.header.Auth Auth Custom domain name to use. Recommend to leave nil and jets will set a conventional custom domain name and then use CloudFront in front outside of Jets to fully control the domain name. nil
domain.cert_arn Cert ARN for SSL nil
domain.endpoint_type The endpoint type to create for API Gateway custom domain. IE: EDGE or REGIONAL. Default to EDGE because CloudFormation update is faster REGIONAL
domain.route53 Controls whether or not to create the managed route53 record. true
lambda.layers Additional custom lambda layers to use. []
encoding.default Default encoding utf-8
s3_event.configure_bucket Whether or not to customer the bucket with the event notification trigger. true
s3_event.notification_configuration Notification configuration nil Override the host value use in the view helpers. IE: nil
controllers.default_protect_from_forgery Whether or not to check for forgery protection defaults to true for html and false for api mode.
controllers.filtered_parameters Parameters to filter in logging output []
app.domain The app domain to use. Should be the domain only without the protocol. This applies at the controller-level, IE: methods like redirect_to nil
deploy.stagger.enabled Stagger the cloudformation update. Can be helpful with large apps. false
deploy.stagger.batch_size Stagger the cloudformation update batch size. 10
hot_reload Whether or not to hot reload Defaults to true in development and false in other envs

Here’s also the application/defaults.rb source where these config options are defined.