Module: Associatable

Included in:
MonoRM::Base
Defined in:
lib/monorm/associatable.rb

Instance Method Summary collapse

Instance Method Details

#assoc_options ⇒ Object 



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# File 'lib/monorm/associatable.rb', line 62

def assoc_options
  @assoc_options ||= {}
  @assoc_options
end

#belongs_to(name, options = {}) ⇒ Object 



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# File 'lib/monorm/associatable.rb', line 37

def belongs_to(name, options = {})
  self.assoc_options[name] = MonoRM::BelongsToOptions.new(name, options)
  define_method(name) do
    belongs_options = self.class.assoc_options[name]
    foreign_key = send(belongs_options.foreign_key)
    model_class = belongs_options.class_name.constantize

    model_class.where(belongs_options.primary_key => foreign_key).first
  end
end

#has_many(name, options = {}) ⇒ Object 



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# File 'lib/monorm/associatable.rb', line 48

def has_many(name, options = {})

  self.assoc_options[name] = MonoRM::HasManyOptions.new(name, self.name, options)

  define_method(name) do
    has_many_options = self.class.assoc_options[name]
    primary_key = send(has_many_options.primary_key)
    model_class = has_many_options.class_name.constantize

    model_class.where(has_many_options.foreign_key => primary_key)
  end
end

#has_one_through(name, through_name, source_name) ⇒ Object 



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# File 'lib/monorm/associatable.rb', line 67

def has_one_through(name, through_name, source_name)


  define_method(name) do
    through_options = self.class.assoc_options[through_name]
    source_options = through_options.model_class.assoc_options[source_name]

    through_options_table = through_options.table_name
    through_options_foreign_key = through_options.foreign_key
    through_options_primary_key = through_options.primary_key

    source_options_table = source_options.table_name
    source_options_foreign_key = source_options.foreign_key
    source_options_primary_key = source_options.primary_key


    search_key = self.send(through_options_foreign_key)
    has_one_results = MonoRM::DBConnection.execute(<<-SQL, search_key)
      SELECT
        #{source_options_table}.*
      FROM
        #{through_options_table}
      JOIN
        #{source_options_table}
      ON
        #{source_options_table}.#{source_options_primary_key} = #{through_options_table}.#{source_options_foreign_key}

      WHERE
        #{through_options_table}.#{through_options_primary_key} = INTERPOLATOR_MARK

    SQL

    source_options.model_class.parse_all(has_one_results).first
  end
end