Module: Databaseformalizer::EntitiesHelper

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

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.initAttrVals(entity) ⇒ Object

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# File 'app/helpers/databaseformalizer/entities_helper.rb', line 3

def EntitiesHelper.initAttrVals(entity)
  entityDef = entity.entity_def
  
  entityDef.attrDefs.each do |attrDef|
    attrVal = AttrVal.new(:attrDef => attrDef)
    entity.attr_vals << attrVal
    attrVal.save
  end
end

.removeAttrVals(params, entity) ⇒ Object

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# File 'app/helpers/databaseformalizer/entities_helper.rb', line 57

def EntitiesHelper.removeAttrVals(params, entity)
  if params == nil; params = []; end   
  params.each do |attrType,attrFormValue|
    attrDef = AttrDef.find(attrType);
    attrVal =  entity.attr_vals.find_all_by_attr_def_name(attrType)
    if attrVal.size > 1
      attrVal = entity.attr_vals.find(:first, :conditions => ["attr_def_name = ? and value = ?", attrType, attrFormValue])
    else
      attrVal = attrVal[0]
    end
    case attrVal.attrDef.dataType
    when "String" || "Date" || "aChoice"
        attrVal.destroy
      when "checkList"
        EntitiesHelper.removeAttrVals(attrFormValue, entity)
        attrVal.destroy
      when "selectOneInList"
        #TODO implement
      when "openList"
        attrFormValue.delete("_destroy")
        map = attrFormValue.map{|a| [a[0][0..-14], a[1]]}

        EntitiesHelper.removeAttrVals(map, entity)
        attrVal.value = "isList"
      when "entityDef"
        attrVal.destroy
    end
  end
end

.setAttrVals(params, entity, parent = nil) ⇒ Object

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# File 'app/helpers/databaseformalizer/entities_helper.rb', line 12

def EntitiesHelper.setAttrVals(params, entity, parent = nil )

  if params == nil; params = []; end   
  params.each do |attrType,attrFormValue|
    attrDef = AttrDef.find(attrType);
    attrVal =  entity.attr_vals.find_by_attr_def_name(attrType)
    #check if item exist or if is in an insert or update
    if attrVal == nil || (attrVal != nil && parent != nil && parent.attrDef.dataType == "openList" )
      attrVal = AttrVal.new(:attrDef => attrDef)
      entity.attr_vals << attrVal
      if parent != nil
        parent.attrValChilds << attrVal
      end
    end

    case attrVal.attrDef.dataType
      when "String"
        attrVal.value = attrFormValue
      when "Date"
        attrVal.value = "25/10/2010"
      when "aChoice"
        attrVal.value = "selected"
      when "checkList"
        #first, we remove unselected items
        attrFormValue.reject!{ |k,val| val == "0" }
        EntitiesHelper.setAttrVals(attrFormValue, entity, attrVal)
        attrVal.value = "isList"
      when "selectOneInList"
        EntitiesHelper.setAttrVals({ attrFormValue => 1 }, entity, attrVal)
        attrVal.value = "isList"
      when "openList"
        attrFormValue.delete("_destroy")
        map = attrFormValue.map{|a| [a[0][0..-14], a[1]]}

        EntitiesHelper.setAttrVals(map, entity, attrVal)
        attrVal.value = "isList"
      when "entityDef"
        attrVal.value = attrFormValue
      else
        attrVal.value = attrFormValue
    end
    attrVal.save
  end
end

.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

Instance Method Details

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# File 'app/helpers/databaseformalizer/entities_helper.rb', line 87

def link_to_add_attrlistvalue(name, f,  parent)
  #fields = f.fields_for parent.id do |builder|
    fields = render("attr_val_openList_element_form", :f => f,  :parent => parent)
  #end
  link_to_function(name, "add_attrlistvalues(this, \"#{parent.attr_def_name}\", \"#{escape_javascript(fields)}\")")
end