Contents

class Datagrid::Filters::BaseFilter

  attr_accessor :grid, :options, :block, :name

  def initialize(grid, name, options = {}, &block)
    self.grid = grid
    self.name = name
    self.options = options
    self.block = block
  end

  def format(value)
    raise NotImplementedError, "#format(value) suppose to be overwritten"
  end

  def apply(grid_object, scope, value)
    if value.nil?
      return scope if !allow_nil?
    else
      return scope if value.blank? && !allow_blank?
    end

    if block.arity >= 2 || block.arity < 0
      scope.instance_exec(value, grid_object, &block)
    else
      scope.instance_exec(value, &block)
    end
  end

  def format_values(value)
    if !self.multiple && value.is_a?(Array) 
      raise Datagrid::ArgumentError, "#{grid.class}.#{name} filter can not accept Array argument. Use :multiple option." 
    end
    values = Array.wrap(value)
    values.map! do |value|
      self.format(value)
    end
    self.multiple ? values : values.first
  end

  def header
    options[:header] || 
      I18n.translate(self.name, :scope => "datagrid.#{grid.param_name}.filters", :default => self.name.to_s.humanize)
  end

  def default
    default = self.options[:default]
    default.respond_to?(:call) ? default.call : default
  end

  def multiple
    self.options[:multiple]
  end

  def allow_nil?
    options.has_key?(:allow_nil) ? options[:allow_nil] : options[:allow_blank]
  end

  def allow_blank?
    options[:allow_blank]
  end

end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
datagrid-0.6.0	lib/datagrid/filters/base_filter.rb