Class: INatGet::Data::Helper::Field::Has Private

Inherits:
Scalar show all
Defined in:
lib/inat-get/data/helpers/defs/has.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Direct Known Subclasses

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Instance Attribute Summary

Attributes inherited from INatGet::Data::Helper::Field

#helper, #key

Instance Method Summary collapse

Methods inherited from Scalar

#valid?

Methods inherited from INatGet::Data::Helper::Field

#prepare, #to_api, #valid?

Constructor Details

#initialize(helper, key, association, extra = nil) ⇒ Has

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Has.



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# File 'lib/inat-get/data/helpers/defs/has.rb', line 7

def initialize helper, key, association, extra = nil
  super helper, key, Boolean
  @association = association
  @extra = extra
end

Instance Method Details

#to_sequel(value) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/inat-get/data/helpers/defs/has.rb', line 13

def to_sequel(value)
  reflection = @helper.manager.model.association_reflection(@association)
  main_table = @helper.manager.model.table_name
  if reflection[:type] == :many_to_many
    join_table = reflection[:join_table]
    left_key = reflection[:left_key]
    right_key = reflection[:right_key]
    right_table = reflection.associated_class.table_name
    query = @helper.manager.model.db[join_table]
                                 .join(right_table, :id => right_key)
                                 .where(Sequel[join_table][left_key] => Sequel[main_table][:id])
    query = query.where(@extra) if @extra
    condition = query.exists
  else
    associated_class = reflection.associated_class
    foreign_key = reflection[:key]
    query = associated_class.where(foreign_key => Sequel[main_table][:id])
    query = query.where(@extra) if @extra
    condition = query.exists
  end
  value ? condition : Sequel.~(condition)
end