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module DatatableHelper
#converts an object array into DataTable format
#example output:
#{"sEcho": 1, "iTotalRecords": 57, "iTotalDisplayRecords": 57,
#{"aaData": [
#["Gecko","Firefox 1.0","Win 98+ / OSX.2+","1.7","A"],["Gecko","Firefox 1.5","Win 98+ / OSX.2+","1.8","A"],["Gecko","Firefox 2.0","Win 98+ / OSX.2+","1.8","A"],["Gecko","Firefox 3.0","Win 2k+ / OSX.3+","1.9","A"],["Gecko","Camino 1.0","OSX.2+","1.8","A"],["Gecko","Camino 1.5","OSX.3+","1.8","A"],["Gecko","Netscape 7.2","Win 95+ / Mac OS 8.6-9.2","1.7","A"],["Gecko","Netscape Browser 8","Win 98SE+","1.7","A"],["Gecko","Netscape Navigator 9","Win 98+ / OSX.2+","1.8","A"],["Gecko","Mozilla 1.0","Win 95+ / OSX.1+","1","A"]
#] }
def self.to_table(data, params = {})
if params[:columns]
return self.table_by_columns(data, params)
else
return self.table_by_attributes(data, params)
end
end
def self.table_by_columns(data, params = {})
output = "{\"iTotalRecords\":" + data.count.to_s + ",\"iTotalDisplayRecords\":" + data.count.to_s + ",\"aaData\":"
rows = Array.new
data.each do |d|
row = Array.new
params[:columns].each do |c|
if (d.attributes[c])
row << d.attributes[c]
elsif (d.instance_variable_defined?("@" + c))
row << d.instance_variable_get("@" + c)
elsif (d.methods.include?(c))
row << d.method(c).call
end
end
rows << row if (row.count > 0)
end
output += rows.to_json
output += "}"
return output
end
def self.table_by_attributes(data, params = {})
output = "{\"iTotalRecords\":" + data.count.to_s + ",\"iTotalDisplayRecords\":" + data.count.to_s + ",\"aaData\":["
rows = Array.new
data.each do |d|
rows << d.attributes.values
end
output += rows.to_json
output += "}"
return output
end
end
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