Module: RailsJqGrid::ActsAsJqGridAble::InstanceMethods

Defined in:
lib/rails_jq_grid/acts_as_jq_grid_able.rb

Instance Method Summary collapse

Instance Method Details

#current_offset(default_recs_per_page = 10) ⇒ Object

calculates the current offset by page and records per page



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# File 'lib/rails_jq_grid/acts_as_jq_grid_able.rb', line 62

def current_offset(default_recs_per_page = 10)
  (current_page - 1) * records_per_page(default_recs_per_page)
end

#current_page ⇒ Object

returns the current page retrieved from jqgrid request default 1



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# File 'lib/rails_jq_grid/acts_as_jq_grid_able.rb', line 68

def current_page
  (params[:page] || 1).to_i
end

#jqgrid_json(options) ⇒ Object

creates json string for jqGrid

options

:total_records count records totaly to display in grid, default :data.count :default_records_per_page when nothing is specified how many

records are shown on a page, default :data.count

:data the records as an array



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# File 'lib/rails_jq_grid/acts_as_jq_grid_able.rb', line 48

def jqgrid_json(options)       
  options[:total_records] ||= options[:data].count
  options[:default_records_per_page] ||= options[:data].count

  records_pp = records_per_page(options[:default_records_per_page])
  total_pages = (options[:total_records] + records_pp - 1).div(records_pp)

  json_data = {:currentpage => current_page , :totalpages => total_pages , :totalrecords => options[:total_records]}
  json_data[:data] = options[:data]

  json_data.to_json
end

#order_by ⇒ Object

tests jqgrid request parameter sidx and sord and returns a sanatized order by statement



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# File 'lib/rails_jq_grid/acts_as_jq_grid_able.rb', line 80

def order_by
  order_column = params[:sidx] || ""

  unless allowed_order_by_cols.include?(order_column)
    order_column = self.class.allowed_order_by_cols.first || ""
  end

  order_column = order_column.to_s
  order = ["asc", "desc"].include?(params[:sord]) ? params[:sord] : ""

  if order_column.blank?
    ""
  else
    "#{order_column} #{order}"
  end

end

#records_per_page(default_recs_per_page = 10) ⇒ Object

returns records per page retrieved from jqgrid request default 1



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# File 'lib/rails_jq_grid/acts_as_jq_grid_able.rb', line 74

def records_per_page(default_recs_per_page = 10)
  (params[:rows] || default_recs_per_page).to_i
end