Class: ActiveRecord::Associations::AssociationScope

Inherits:
Object
  • Object
show all
Defined in:
lib/activerecord-spatial/associations/active_record_3.rb,
lib/activerecord-spatial/associations/active_record.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#add_constraints_with_spatial(scope) ⇒ Object 



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# File 'lib/activerecord-spatial/associations/active_record_3.rb', line 46

def add_constraints_with_spatial(scope)
  return add_constraints_without_spatial(scope) if !self.association.is_a?(SpatialAssociation)

  tables = construct_tables

  chain.each_with_index do |reflection, i|
    table, foreign_table = tables.shift, tables.first

    conditions = self.conditions[i]
    geom_options = {
      :class => self.association.klass
    }

    if self.association.geom.is_a?(Hash)
      geom_options.merge!(
        :value => owner[self.association.geom[:name]]
      )
      geom_options.merge!(self.association.geom)
    else
      geom_options.merge!(
        :value => owner[self.association.geom],
        :name => self.association.geom
      )
    end

    if reflection == chain.last
      scope = scope.send("st_#{self.association.relationship}", geom_options, self.association.scope_options)

      if reflection.type
        scope = scope.where(table[reflection.type].eq(owner.class.base_class.name))
      end

      conditions.each do |condition|
        scope = scope.where(interpolate(condition))
      end
    else
      constraint = scope.where(
        scope.send(
          "st_#{self.association.relationship}",
          owner[self.association.foreign_geom],
          self.association.scope_options
        ).where_values
      ).join(' AND ')

      if reflection.type
        type = chain[i + 1].klass.base_class.name
        constraint = table[reflection.type].eq(type).and(constraint)
      end

      scope = scope.joins(join(foreign_table, constraint))

      unless conditions.empty?
        scope = scope.where(sanitize(conditions, table))
      end
    end
  end

  scope
end