Class: Mobility::Backend::Sequel::Hstore::QueryMethods

Inherits:
QueryMethods show all
Defined in:
lib/mobility/backend/sequel/hstore/query_methods.rb

Instance Method Summary collapse

Constructor Details

#initialize(attributes, **options) ⇒ QueryMethods

Returns a new instance of QueryMethods.



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# File 'lib/mobility/backend/sequel/hstore/query_methods.rb', line 6

def initialize(attributes, **options)
  super
  attributes_extractor = @attributes_extractor

  define_method :_filter_or_exclude do |invert, clause, *conds, &block|
    if (clause == :where) && i18n_keys = attributes_extractor.call(conds.first)
      locale = Mobility.locale.to_s
      table_name = model.table_name
      cond = conds.first

      i18n_query = i18n_keys.inject(::Sequel.expr(!invert)) do |expr, attr|
        value = cond.delete(attr)
        attr_hstore = ::Sequel.hstore_op(attr)
        contains_value = attr_hstore.contains({ locale => value.to_s })
        has_key = attr_hstore.has_key?(locale)
        if invert
          expr.|(has_key & ~contains_value)
        else
          expr.&(value.nil? ? ~has_key : contains_value)
        end
      end
      super(invert, clause, *conds, &block).where(i18n_query)
    else
      super(invert, clause, *conds, &block)
    end
  end

  attributes.each do |attribute|
    define_method :"first_by_#{attribute}" do |value|
      where(::Sequel.hstore(attribute.to_sym).contains(::Sequel.hstore({ Mobility.locale.to_s => value }))).
        select_all(model.table_name).first
    end
  end
end