attenzione

class BooleanValue
  # https://github.com/rails/rails/blob/master/activemodel/lib/active_model/type/boolean.rb
  FALSE_VALUES = [
    false, 0,
    "0", :"0",
    "f", :f,
    "F", :F,
    "false", :false,
    "FALSE", :FALSE,
    "off", :off,

wycats

There are several types of relationships.

• OneToMany
• OneToOne
• OneToNone
• ManyToNone

A OneToMany relationship has a Set of members and a link to the belongsTo. Each member and the belongsTo has a link back to the relationship. The member links can change.

A ManyToNone relationship has a Set of members and a link to the belongsTo. The belongsTo has a link back to the relationship. The link doesn't change.