Class: RGhost::Grid::Rails

Inherits:
Base show all
Defined in:
lib/rghost/grid/rails_grid.rb

Overview

Grid::Rails mapps grid columns to ActiveRecord attributes. For example, let's take a Calls class to represent telephone calls.

Example

rails_grid=Grid::Rails.new(:align => :center, :width => 3)

Mapping, first the attribute name then the already known optionsName

rails_grid.column :mobile,   :title => "Mobile", :align => :right
rails_grid.column :duration, :title => "Duration",:width => 3
rails_grid.column :start,    :title => "Start", :format => :eurodate
rails_grid.column :called,   :title => "Number", :align => :right, :title_align => :center

Load data

calls = Call.find(:all, :limit => 5000)
rails_grid.data(calls)

Relationships

You can also use attributes of associated objects, via a block or string. For example consider Accounts and Customers relationship. Let's produce a grid od all Customers plus some data reffering to the first account the customer had created.

class Accounts < ActiveRecord::Base
  belongs_to :customer
end
class Customers < ActiveRecord::Base
  has_many :accounts
end

c = Customers.find(:all, :include => :accounts )

Using a block

g=Grid::Rails.new  :width => 4
g.column :id,         :title => "Customer id"
g.column :name,       :title => "Name",   :width => 6
g.column :created_on, :title => "Date ",  :format => lambda{|d| d.strftime("%m/%d/%Y") }
g.column lambda { accounts.first. }, :title => "Login"
g.column lambda { accounts.first.type },  :title => "Account Type"
g.data(c)

Or a String

g.column 'accounts.first.login', :title => "

Constant Summary

Constants included from RubyToPs

RubyToPs::UTF8_ENCODINGS

Instance Attribute Summary

Attributes inherited from Base

#column_padding, #header

Instance Method Summary collapse

Methods inherited from Base

#format_field, #initialize, #proc_line, #ps, #style, #width

Methods included from CallbackFacade

#after_column, #before_column, #before_row, #even_column, #even_row, #odd_column, #odd_row

Methods included from RubyToPs

#array_to_stack, #hash_to_array, #pack_string, #ps_escape, #string_eval, #to_array, #to_bool, #to_string, #to_string_array

Methods inherited from PsObject

#<<, #call, #graphic_scope, #initialize, #ps, #raw, #set, #to_s

Constructor Details

This class inherits a constructor from RGhost::Grid::Base

Instance Method Details

#col(field_name, options = {}) ⇒ Object

:nodoc:


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# File 'lib/rghost/grid/rails_grid.rb', line 60

def col(field_name, options={}) #:nodoc:
  super(options[:title],options)
   
  @rails_cols||=[]
  owf=options.dup #from options with field
  owf[:field_name]||=field_name
  @rails_cols << owf

end

#column(field_name, options = {}) ⇒ Object

:nodoc:


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# File 'lib/rghost/grid/rails_grid.rb', line 70

def column(field_name, options={}) #:nodoc:
  col(field_name,options)
end

#data(_data) ⇒ Object

The parameter _data is an Array of ActiveRecord::Base objects.


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# File 'lib/rghost/grid/rails_grid.rb', line 44

def data(_data)
  _data.collect do |d|
    line=@rails_cols.collect do |c|
      case c[:field_name]
        when Symbol
          d[c[:field_name]]
        when String
          d.instance_eval c[:field_name]
        when Proc
          d.instance_eval(&c[:field_name])
      end
    end
    proc_line(line)
  end
end