Aggregatable
Buildable
CQL
- ActiveRecord
  - Attributes
  - Callbacks
  - Definition
  - Deleteable
  - Identifyable
  - Insertable
  - Model
  - OptimisticLocking
  - Pagination
  - Persistence
  - Queryable
    - ChainableQuery
  - Relations
    - BelongsTo
    - Collection
    - HasMany
    - HasOne
    - ManyCollection
    - ManyToMany
  - Scopes
  - Transactional
  - Updateable
  - Validations
    - AllNumbers
    - Constraint
    - CustomValidator
    - Equal
    - Error
    - Errors
    - Exclusion
    - GreaterThan
    - GreaterThanOrEqual
    - Inclusion
    - LessThan
    - LessThanOrEqual
    - Predicates
    - Presence
    - RegularExpression
    - Required
    - Size
    - ValidationError
- Adapter
- AlterTable
- BaseMigration
- CheckConstraint
- Column
- ConnectionError
- Delete
- DialectError
- Error
- ErrorHandler
- ForeignKey
- Index
- Insert
- JSONBConverter
- MergeQuery
- Migration
- MigrationRecord
- Migrator
- MySqlUnsupportedFeatureError
- OptimisticLockError
- PrimaryKey
- PrimaryKeyType
- Query
  - QueryTableInfo
- RecordInvalid
- RecordNotFound
- RecordNotFoundError
- RecordNotSaved
- Repository
- Schema
  - ConnectionError
  - Error
  - InvalidURIError
  - VersionConflictError
- SQLiteUnsupportedFeatureError
- Table
- UniqueConstraint
- Update
- ValidationError
Executable
Filterable
InternalHelpers
Joinable
Modifiable
Selectable
TableManagement

Generated using Crystal 1.16.0
2025-05-11 18:52:52 UTC

module CQL::ActiveRecord::Relations::HasOne

Overview

Define the has_one association

Defined in:

active_record/relations/has_one.cr

Macro Summary

has_one(name, kind)

Macro Detail

macro has_one(name, kind) #

[View source]