ORM

An example model

model Userdo# or class User < ORM::Model
schema do# everything in schema should map to a change in SQL
table "users"
primary_key id : UUID, column_type:"uuid", default: uuid_generate_v4()
field first_name : String
field last_name : String, column_type:"string", column_name:"lastName", unique:true, default:"some value"
field age : Int32
has_many posts : BlogPost, foreign_key:"author_id", primary_key:"id"
belongs_to organization : Organization, foreign_key:"organization_id", primary_key:"id"
has_and_belongs_to_many categories : Category, reference_key:"user_id", other_reference_key:"category_id", join_table:"categories_users"
has_many comments : Comment, through: posts
constraint check:"age > 13"end# ... application specific logicend