Module: AnafHabtm::ActiveRecord

Defined in:
lib/anaf_habtm/anaf_active_record.rb

Instance Method Summary collapse

Instance Method Details

#anaf_habtm(association, options = {}) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 27

def anaf_habtm(association, options={})
  ar_opts = options[:ar_options] ||= {}
  klass = ar_opts[:class_name] ||= association.to_s.singularize.camelize
  class_eval do
    has_and_belongs_to_many association.to_sym, ar_opts
  end
  find_line = "obj = obj ||= #{klass}.#{make_scope_string(options[:find])}.first" if options.has_key?(:find)
  association = association.to_s.underscore.tableize
  scope_string =
  class_eval <<END
      def #{association}_attributes=(attr_hash)
        obj_coll = []
        attr_hash.each_value do |obj_attr|
          next if obj_attr["_destroy"] == "1"
          obj = #{klass}.find(obj_attr["id"]) if obj_attr.has_key?("id")
          obj_attr = obj_attr.reject_keys ["id", "_destroy"]
          #{find_line}
          if obj && obj.update_attributes(obj_attr)
            obj_coll << obj
          elsif (obj = #{klass}.new(obj_attributes)) && obj.save
            obj_coll << obj
          end
        end
        self.#{association} = obj_coll
      end
END
end

#association_text(association, opts = {}) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 55

def association_text(association, opts={})
  raise "Must give a name for text_association" unless opts.has_key?(:name)
  class_eval do
    if opts.has_key?(:class_name)
      klass = opts[:class_name].constantize
    else
      klass = association.to_s.singularize.camelize.constantize
    end
    define_method "#{association.to_s}_text=", lambda{ |text|
      return if text.empty?
      coll = StringReader.new.read_items(text) do |name, commentary|
        a = klass.undecorate(name) if klass.methods.include?("undecorate")
        if opts.has_key?(:scope)
          obj = self.send(association).scopes[opts[:scope]].call(name).first
        end
        params = {opts[:name]=>name}
        params[opts[:commentary]] = commentary if opts.has_key?(:commentary)
        obj = obj ||= klass.new
        obj = klass.find(obj) unless obj.new_record?
        obj.decoration = a if a
        obj.attributes = params
        obj.save
        obj
      end
      self.send("#{association.to_s}=", coll)
    }

    define_method "#{association.to_s}_text", lambda{
      StringReader.new.write_items(self.send(association.to_s)) do |item|
        name = item.send(opts[:name])
        name = item.decorate(name) if item.methods.include?("decorate")
        [name, opts.has_key?(:commentary) ? item.send(opts[:commentary]) : ""]
      end
    }
  end
end

#autocomplete_format(&block) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 4

def autocomplete_format(&block)
  class_eval do
    @autocomplete_block = block
    def self.to_autocomplete(items)
        items.map{|t| @autocomplete_block.call(t)}.to_json
    end
  end
end

#condition(cond) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 155

def condition(cond)
   search_columns.map{|c| "trim(lower(#{c})) #{cond}"}.join(" or ")
end

#equals_condition(str) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 146

def equals_condition(str)
  where(condition("= '#{str.downcase}'"))
end

#like_condition(str) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 142

def like_condition(str)
  where(condition("ilike '%#{str}%'"))
end

#lookup(params) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 133

def lookup(params)
  str = params[:id]
  if str.match(/\D/)
    named(str)
  else
    find(str)
  end
end

#make_scope_string(find_opts) ⇒ Object

Needs to call scopes on a class and pass it values that are

pulled from a hash called obj_attr

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# File 'lib/anaf_habtm/anaf_active_record.rb', line 15

def make_scope_string(find_opts)
  _scopes = []
  find_opts.each{ |scope, attr_name|
    if attr_name.class == Hash
      _scopes << "#{scope.to_s}(obj_attr[#{name.first[0].to_s}][#{name.first[1].to_s}])"
    else
      _scopes << "#{scope.to_s}(obj_attr[#{name.to_s}])"
    end
  }
  _scopes.join(".")
end

#named(str) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 151

def named(str)
  with_name(str).first
end

#named_association(member, attribute, opts = {}) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 92

def named_association(member, attribute, opts={})
  member = member.to_s
  klass = (opts.has_key?(:class_name) ? opts[:class_name] : member.to_s.singularize.camelize).constantize
  attribute = attribute.to_s
  if opts.has_key?(:create)
    class_eval do
      define_method "#{member}_#{attribute}=", lambda{|value|
        return if value.blank?
        obj = klass.named(value)
        obj = obj ||= klass.create(attribute => value)
        self.send("#{member}=", obj)
      }
    end
  else
    class_eval do
      define_method "#{member}_#{attribute}=", lambda{|value|
        self.send("#{member}=",klass.named(value)) unless value.blank?
      }
    end
  end
  class_eval "def #{member}_#{attribute};
     #{member}.#{attribute} if #{member};
   end;"
end

#search_on(*cols) ⇒ Object


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# File 'lib/anaf_habtm/anaf_active_record.rb', line 117

def search_on(*cols)
  class_eval "def self.search_columns; #{cols.map{|t| t.to_s}.to_ary.inspect}; end;"
  class_eval do
    scope :search, lambda{|str|
      items = like_condition(str.downcase)
      if scopes.has_key?(:search_mod)
        items = items.search_mod
      end
      items
    }
    scope :with_name, lambda{|str|
      equals_condition(str.downcase).limit(1)
    }
  end
end