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require "rghost/ps_object"
#
# 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.login }, :title => "Login"
# g.column lambda { accounts.first.type }, :title => "Account Type"
# g.data(c)
# Or a String
# g.column 'accounts.first.login', :title => Login"
class RGhost::Grid::Rails < RGhost::Grid::Base
# The parameter +_data+ is an Array of ActiveRecord::Base objects.
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
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
def column(field_name, options = {}) # :nodoc:
col(field_name, options)
end
end
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