Amber
- Adapters
  - AdapterFactory
  - MemoryPubSubAdapter
  - MemorySessionAdapter
    - BatchOperations
  - PubSubAdapter
  - SessionAdapter
  - SessionBatchOperations
- Cluster
- Configuration
  - AppConfig
  - DatabaseConfig
  - EnvOverride
  - JobsConfig
  - LoggingConfig
  - MailerConfig
  - PubSubConfig
  - ServerConfig
  - SessionConfig
  - SMTPConfig
  - SSLConfig
  - StaticConfig
- Controller
  - Base
  - Callbacks
  - Error
    - Helpers
  - Filter
  - FilterBuilder
  - Filters
  - Helpers
    - AssetHelpers
    - CSRF
    - FormHelpers
    - I18n
    - MarkdownHelper
    - NumberHelpers
    - Redirect
    - Render
    - Responders
      - Content
      - ProcType
    - Route
    - TagHelpers
    - TextHelpers
    - URLHelpers
  - SchemaIntegration
  - SchemaParamsWrapper
  - Static
- DSL
  - Callbacks
  - Pipeline
  - Router
  - SchemaRouter
  - Server
- Environment
  - Env
  - EnvType
  - Loader
  - Logging
    - OptionsType
  - Settings
    - SettingValue
    - SMTPSettings
- Exceptions
  - Base
  - ConfigurationError
  - Controller
    - Redirect
  - CookieOverflow
  - DuplicateRouteError
  - EncryptionKeyMissing
  - Environment
  - Forbidden
  - InvalidMessage
  - InvalidSignature
  - Page
  - RouteNotFound
  - Validator
    - InvalidParam
    - ValidationFailed
- Extensions
  - HTTPServerContext
  - Number
  - String
- Jobs
  - Configuration
  - Job
  - JobEnvelope
    - Status
  - MemoryQueueAdapter
  - QueueAdapter
  - Scheduler
  - Worker
- Mailer
  - Attachment
  - Base
  - Configuration
  - DeliveryAdapter
  - DeliveryResult
  - Email
  - MemoryAdapter
  - MimeBuilder
  - SMTPAdapter
  - SMTPError
- Markdown
  - HTMLEntities
  - HTMLRenderer
  - Node
    - DataType
    - DataValue
    - Type
  - Options
  - Parser
    - Block
    - Inline
      - Bracket
      - Delimiter
  - Renderer
  - Rule
    - BlockQuote
    - CodeBlock
    - ContinueStatus
    - Document
    - Heading
    - HTMLBlock
    - Item
    - List
    - MatchValue
    - Paragraph
    - Table
    - ThematicBreak
  - Utils
- Pipe
  - ApiVersion
  - Base
  - ClientIp
  - Controller
  - CORS
    - OriginType
  - CSRF
  - Error
  - Flash
  - Headers
  - Logger
  - Origin
  - Pipeline
  - PoweredByAmber
  - Preflight
  - Session
  - Static
- Route
- Router
  - Constraint
  - Constraints
    - Accept
    - Header
    - Host
    - Subdomain
  - Cookies
    - AbstractStore
    - EncryptedStore
    - PermanentStore
    - SignedStore
    - Store
  - File
  - FixedSegment
  - Flash
    - FlashStore
  - GlobMatch
  - GlobSegment
  - NamedRoutes
  - Params
  - Parsers
    - FormData
    - JSON
    - Multipart
    - OptionalSegmentResolver
  - RoutedResult
  - RouteInfo
  - RoutePrinter
  - Router
  - RouteSet
  - Scope
  - Segment
  - Session
    - AbstractStore
    - AdapterSessionStore
    - CookieStore
    - SessionHash
    - Store
  - TerminalSegment
  - Types
    - Files
    - Key
    - Params
  - VariableSegment
- Schema
  - Accept
  - ControllerIntegration
  - CustomValidationError
  - Default
  - Definition
    - ConditionalGroup
    - FieldDef
    - SourceBlock
  - Deprecated
  - Description
  - DSL
  - DuplicateFieldError
  - Enum
  - Error
  - Example
  - ExternalDocs
  - Failure
  - Format
  - Group
  - Header
  - InvalidFormatError
  - InvalidSchemaError
  - LegacyResult
  - LengthError
  - Max
  - Message
  - Min
  - Nullable
  - OperationId
  - ParamSource
  - Parser
    - Base
    - Chain
    - Context
    - FileUploadValidator
    - JSONParser
    - MultipartParser
      - FileInfo
    - ParserRegistry
    - QueryParser
    - Sanitizer
      - Option
    - Transform
    - TypeCoercion
    - XMLParser
      - XPathContext
  - PathParam
  - Pattern
  - QueryParam
  - RangeError
  - RateLimit
  - Request
  - RequestSchema
  - Required
  - RequiredFieldError
  - RequirePermissions
  - Response
  - ResponseBuilder
    - Format
    - Status
  - ResponseFormatters
    - ErrorFormatter
      - DetailLevel
      - GroupBy
    - JSONResponse
      - Structure
  - ResponseSchema
  - Result
  - ResultHelpers
  - RouteRegistry
  - SchemaDefinitionError
  - Security
  - Success
  - Summary
  - Tag
  - Transform
  - Type
  - TypeCoercion
    - CoercionError
    - CoercionFunction
  - TypeMismatchError
  - ValidatedRequest
  - ValidationError
  - ValidationFailure
  - Validator
    - Base
    - Composite
    - Conditional
    - Context
    - Custom
    - Enum
    - Field
    - Format
      - FormatType
    - Length
    - Max
    - MaxLength
    - Min
    - MinLength
    - Pattern
    - Range
    - Required
    - Type
  - Warning
  - When
- Server
  - WebSocketAdapter
- SSL
- Support
  - ClientReload
  - FileEncryptor
  - Inflector
  - LocaleFormat
  - MessageEncryptor
  - MessageVerifier
  - MimeTypes
- Testing
  - Assertions
  - ContextBuilder
  - ControllerHelpers
  - RequestHelpers
  - TestClientSocket
  - TestResponse
  - TestWebSocket
  - WebSocketHelpers
- Validators
  - BaseRule
  - Error
  - OptionalRule
  - Params
  - RequiredRule
  - ValidationBuilder
- WebSockets
  - Adapters
    - MemoryAdapter
  - Channel
  - ClientSocket
  - ClientSockets
  - Decoders
  - DisconnectedConnection
  - Presence
  - Server
    - Handler
  - SubscriptionManager
Backtracer
- Backtrace
  - Frame
    - Context
    - Parser
  - Parser
- Configuration
BookError
BookResponse
BookXMLSchema
ExceptionPage
- Helpers
- Styles
FormDataExample
HTML
JsonParserExample
Number
SimpleFormExample
String
XMLParserExample

Generated using Crystal 1.16.3
2026-08-01 01:50:15 UTC

annotation Amber::Schema::Nullable

Overview

Mark a field as allowing null values Example: @[Nullable]

Defined in:

amber/schema/annotations.cr