CODEWITHSUNDEEP
ruby-on-railsruby
fl00r
fl00r

Reputation: 83680

Relationships of model

How can I get all relationships for model. IE, I've got User model:

class User < AR::Base
  has_many :messages, :foreign_key => 'author'
  has_many :posts
  belongs_to :role
end

So how can I know which relationships User model has got? And foreign_keys if they are presented.

Upvotes: 2

Views: 402

Answers (1)

Alex Wayne
Alex Wayne

Reputation: 187034

User.reflect_on_all_associations.each do |assoc|
  puts "#{assoc.macro} #{assoc.name}"
end

Outputs:

has_many messages
has_many posts
belongs_to role

The reflect_on_all_associations method return an array of MacroReflection objects. They support other methods as well, for querying the options hash of each association and other useful stuff.

Upvotes: 7

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