Method: Databaseformalizer::EntitiesHelper.setModelGraph

Defined in:
app/helpers/databaseformalizer/entities_helper.rb

.setModelGraph(uri) ⇒ Object 



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# File 'app/helpers/databaseformalizer/entities_helper.rb', line 94

def EntitiesHelper.setModelGraph(uri )
  require 'graphviz'
  # Create a new graph
  g = GraphViz.new( :G, :type => :digraph )
  
  # Graph configuration
  g.node[:color]    = "#ddaa66"
  g.node[:style]    = "filled"
  g.node[:shape]    = "box"
  g.node[:penwidth] = "1"
  g.node[:fontname] = "Trebuchet MS"
  g.node[:fontsize] = "8"
  g.node[:fillcolor]= "#ffeecc"
  g.node[:fontcolor]= "#000000"
  g.node[:margin]   = "0.05"
  
  # set global edge options
  g.edge[:color]    = "#999999"
  g.edge[:weight]   = "1"
  g.edge[:fontsize] = "6"
  g.edge[:fontcolor]= "#444444"
  g.edge[:fontname] = "Verdana"
  
  # Create two nodes
  nodesMap = {}
  @links = Array.new
  Entity.all.each do |entity|
    if entity.entity_def == nil
      next
    end
    attrs = '';
    entity.attr_vals.each do |attrVal|
      if attrVal.attrDef.dataType == "entityDef"
        #we need to add a link
        if attrVal.attrDef.childEntityDef != nil
          @links.push([attrVal.value,entity.id.to_s])
          begin
            attrs += attrVal.attrDef.label+':'+attrVal.attrDef.dataType+'="'+CGI.escapeHTML(attrVal.value)+'"\l'
          rescue
          end
        else
          attrs += '+ '+attrVal.attrDef.label+' : null\l'
        end
      else
        begin
          attrs += attrVal.attrDef.label+':'+attrVal.attrDef.dataType+'="'+CGI.escapeHTML(attrVal.value)+'"\l'
        rescue
        end
      end
    end
    begin
      nodesMap[entity.id.to_s] = g.add_nodes( entity.id.to_s, "shape" => "record", "label" => '{'+entity.label+':'+entity.entity_def.id.to_s+'|'+attrs+'}' )
      g.add_nodes( entity.id.to_s,"shape" => "record", "label" => '{'+entity.label+':'+entity.entity_def.id.to_s+'|'+attrs+'}' )
    rescue
    end
  end
  @links.each do |link|
    begin
      g.add_edges( nodesMap[link[0]], nodesMap[link[1]])
    rescue
    end
  end
  # Generate output image
  g.output( :png => uri )
end