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Class: Arel::Visitors::Dot

Do not use. This class is for internal use only.
Relationships & Source Files
Namespace Children
Classes:
Edge, Node
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Visitor
Instance Chain:
self, Visitor
Inherits: Arel::Visitors::Visitor
Defined in: activerecord/lib/arel/visitors/dot.rb

Class Method Summary

Visitor - Inherited

.new, .dispatch_cache

Instance Attribute Summary

Visitor - Inherited

#dispatch

Instance Method Summary

Visitor - Inherited

#accept, #get_dispatch_cache, #visit

Constructor Details

.new ⇒ Dot

[ GitHub ] 

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 19



def initialize
  super()
  @nodes      = []
  @edges      = []
  @node_stack = []
  @edge_stack = []
  @seen       = {}
end


  







Instance Method Details



  

    #accept(object, collector)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 28



def accept(object, collector)
  visit object
  collector << to_dot
end


  








  

    #edge(name)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 260



def edge(name)
  edge = Edge.new(name, @node_stack.last)
  @edge_stack.push edge
  @edges << edge
  yield
  @edge_stack.pop
end


  








  

    #quote(string)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 278



def quote(string)
  string.to_s.gsub('"', '\"')
end


  








  

    #to_dot   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 282



def to_dot
  "digraph \"Arel\" {\nnode [width=0.375,height=0.25,shape=record];\n" +
    @nodes.map { |node|
      label = "<f0>#{node.name}"

      node.fields.each_with_index do |field, i|
        label += "|<f#{i + 1}>#{quote field}"
      end

      "#{node.id} [label=\"#{label}\"];"
    }.join("\n") + "\n" + @edges.map { |edge|
      "#{edge.from.id} -> #{edge.to.id} [label=\"#{edge.name}\"];"
    }.join("\n") + "\n}"
end


  








  

    #visit(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 246



def visit(o)
  if node = @seen[o.object_id]
    @edge_stack.last.to = node
    return
  end

  node = Node.new(o.class.name, o.object_id)
  @seen[node.id] = node
  @nodes << node
  with_node node do
    super
  end
end


  








  

    #visit__children(o)   (private)
    Also known as: #visit_Arel_Nodes_And, #visit_Arel_Nodes_With
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 188



def visit__children(o)
  o.children.each_with_index do |child, i|
    edge(i) { visit child }
  end
end


  








  

    #visit__no_edges(o)   (private)
    Also known as: #visit_Arel_Nodes_CurrentRow, #visit_Arel_Nodes_Distinct
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 103



def visit__no_edges(o)
  # intentionally left blank
end


  








  

    #visit__regexp(o)   (private)
    Also known as: #visit_Arel_Nodes_Regexp, #visit_Arel_Nodes_NotRegexp
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 60



def visit__regexp(o)
  visit_edge o, "left"
  visit_edge o, "right"
  visit_edge o, "case_sensitive"
end


  








  

    #visit_ActiveModel_Attribute(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 215



def visit_ActiveModel_Attribute(o)
  visit_edge(o, "value_before_type_cast")
end


  








  

    #visit_Arel_Attributes_Attribute(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 183



def visit_Arel_Attributes_Attribute(o)
  visit_edge o, "relation"
  visit_edge o, "name"
end


  








  

    #visit_Arel_Nodes_And(o)   (private)
  



  

    

Alias for #visit__children.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 193



alias :visit_Arel_Nodes_And :visit__children


  








  

    #visit_Arel_Nodes_Binary(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 44



def visit_Arel_Nodes_Binary(o)
  visit_edge o, "left"
  visit_edge o, "right"
end


  








  

    #visit_Arel_Nodes_BindParam(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 211



def visit_Arel_Nodes_BindParam(o)
  visit_edge(o, "value")
end


  








  

    #visit_Arel_Nodes_Case(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 236



def visit_Arel_Nodes_Case(o)
  visit_edge(o, "case")
  visit_edge(o, "conditions")
  visit_edge(o, "default")
end


  








  

    #visit_Arel_Nodes_Casted(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 172



def visit_Arel_Nodes_Casted(o)
  visit_edge o, "value"
  visit_edge o, "attribute"
end


  








  

    #visit_Arel_Nodes_Comment(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 232



def visit_Arel_Nodes_Comment(o)
  visit_edge(o, "values")
end


  








  

    #visit_Arel_Nodes_Count(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 77



def visit_Arel_Nodes_Count(o)
  visit_edge o, "expressions"
  visit_edge o, "distinct"
end


  








  

    #visit_Arel_Nodes_CurrentRow(o)   (private)
  



  

    

Alias for #visit__no_edges.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 106



alias :visit_Arel_Nodes_CurrentRow :visit__no_edges


  








  

    #visit_Arel_Nodes_DeleteStatement(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 159



def visit_Arel_Nodes_DeleteStatement(o)
  visit_edge o, "relation"
  visit_edge o, "wheres"
  visit_edge o, "orders"
  visit_edge o, "limit"
  visit_edge o, "offset"
  visit_edge o, "key"
end


  








  

    #visit_Arel_Nodes_Distinct(o)   (private)
  



  

    

Alias for #visit__no_edges.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 107



alias :visit_Arel_Nodes_Distinct :visit__no_edges


  








  

    #visit_Arel_Nodes_Extract(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 109



def visit_Arel_Nodes_Extract(o)
  visit_edge o, "expressions"
  visit_edge o, "alias"
end


  








  

    #visit_Arel_Nodes_Function(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 34



def visit_Arel_Nodes_Function(o)
  visit_edge o, "expressions"
  visit_edge o, "distinct"
  visit_edge o, "alias"
end


  








  

    #visit_Arel_Nodes_HomogeneousIn(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 177



def visit_Arel_Nodes_HomogeneousIn(o)
  visit_edge o, "values"
  visit_edge o, "type"
  visit_edge o, "attribute"
end


  








  

    #visit_Arel_Nodes_InfixOperation(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 54



def visit_Arel_Nodes_InfixOperation(o)
  visit_edge o, "operator"
  visit_edge o, "left"
  visit_edge o, "right"
end


  








  

    #visit_Arel_Nodes_InsertStatement(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 121



def visit_Arel_Nodes_InsertStatement(o)
  visit_edge o, "relation"
  visit_edge o, "columns"
  visit_edge o, "values"
  visit_edge o, "select"
end


  








  

    #visit_Arel_Nodes_NamedFunction(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 114



def visit_Arel_Nodes_NamedFunction(o)
  visit_edge o, "name"
  visit_edge o, "expressions"
  visit_edge o, "distinct"
  visit_edge o, "alias"
end


  








  

    #visit_Arel_Nodes_NamedWindow(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 96



def visit_Arel_Nodes_NamedWindow(o)
  visit_edge o, "partitions"
  visit_edge o, "orders"
  visit_edge o, "framing"
  visit_edge o, "name"
end


  








  

    #visit_Arel_Nodes_NotRegexp(o)   (private)
  



  

    

Alias for #visit__regexp.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 66



alias :visit_Arel_Nodes_NotRegexp :visit__regexp


  








  

    #visit_Arel_Nodes_Ordering(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 68



def visit_Arel_Nodes_Ordering(o)
  visit_edge o, "expr"
end


  








  

    #visit_Arel_Nodes_Regexp(o)   (private)
  



  

    

Alias for #visit__regexp.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 65



alias :visit_Arel_Nodes_Regexp :visit__regexp


  








  

    #visit_Arel_Nodes_SelectCore(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 128



def visit_Arel_Nodes_SelectCore(o)
  visit_edge o, "source"
  visit_edge o, "projections"
  visit_edge o, "wheres"
  visit_edge o, "windows"
  visit_edge o, "groups"
  visit_edge o, "comment"
  visit_edge o, "havings"
  visit_edge o, "set_quantifier"
  visit_edge o, "optimizer_hints"
end


  








  

    #visit_Arel_Nodes_SelectStatement(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 140



def visit_Arel_Nodes_SelectStatement(o)
  visit_edge o, "cores"
  visit_edge o, "limit"
  visit_edge o, "orders"
  visit_edge o, "offset"
  visit_edge o, "lock"
  visit_edge o, "with"
end


  








  

    #visit_Arel_Nodes_SqlLiteral(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 209



alias :visit_Arel_Nodes_SqlLiteral :visit_String


  








  

    #visit_Arel_Nodes_StringJoin(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 86



def visit_Arel_Nodes_StringJoin(o)
  visit_edge o, "left"
end


  








  

    #visit_Arel_Nodes_TableAlias(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 72



def visit_Arel_Nodes_TableAlias(o)
  visit_edge o, "name"
  visit_edge o, "relation"
end


  








  

    #visit_Arel_Nodes_Unary(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 40



def visit_Arel_Nodes_Unary(o)
  visit_edge o, "expr"
end


  








  

    #visit_Arel_Nodes_UnaryOperation(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 49



def visit_Arel_Nodes_UnaryOperation(o)
  visit_edge o, "operator"
  visit_edge o, "expr"
end


  








  

    #visit_Arel_Nodes_UpdateStatement(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 149



def visit_Arel_Nodes_UpdateStatement(o)
  visit_edge o, "relation"
  visit_edge o, "wheres"
  visit_edge o, "values"
  visit_edge o, "orders"
  visit_edge o, "limit"
  visit_edge o, "offset"
  visit_edge o, "key"
end


  








  

    #visit_Arel_Nodes_ValuesList(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 82



def visit_Arel_Nodes_ValuesList(o)
  visit_edge o, "rows"
end


  








  

    #visit_Arel_Nodes_Window(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 90



def visit_Arel_Nodes_Window(o)
  visit_edge o, "partitions"
  visit_edge o, "orders"
  visit_edge o, "framing"
end


  








  

    #visit_Arel_Nodes_With(o)   (private)
  



  

    

Alias for #visit__children.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 194



alias :visit_Arel_Nodes_With :visit__children


  








  

    #visit_Arel_Table(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 168



def visit_Arel_Table(o)
  visit_edge o, "name"
end


  








  

    #visit_Array(o)   (private)
    Also known as: #visit_Set
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 225



def visit_Array(o)
  o.each_with_index do |member, i|
    edge(i) { visit member }
  end
end


  








  

    #visit_BigDecimal(o)   (private)
  



  

    

Alias for #visit_String.


  



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# File 'activerecord/lib/arel/visitors/dot.rb', line 206



alias :visit_BigDecimal :visit_String


  








  

    #visit_Date(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 200



alias :visit_Date :visit_String


  








  

    #visit_DateTime(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 201



alias :visit_DateTime :visit_String


  








  

    #visit_edge(o, method)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 242



def visit_edge(o, method)
  edge(method) { visit o.send(method) }
end


  








  

    #visit_FalseClass(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 204



alias :visit_FalseClass :visit_String


  








  

    #visit_Float(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 207



alias :visit_Float :visit_String


  








  

    #visit_Hash(o)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 219



def visit_Hash(o)
  o.each_with_index do |pair, i|
    edge("pair_#{i}") { visit pair }
  end
end


  








  

    #visit_Integer(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 205



alias :visit_Integer :visit_String


  








  

    #visit_NilClass(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 202



alias :visit_NilClass :visit_String


  








  

    #visit_Set(o)   (private)
  



  

    

Alias for #visit_Array.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 230



alias :visit_Set :visit_Array


  








  

    #visit_String(o)   (private)
    Also known as: #visit_Time, #visit_Date, #visit_DateTime, #visit_NilClass, #visit_TrueClass, #visit_FalseClass, #visit_Integer, #visit_BigDecimal, #visit_Float, #visit_Symbol, #visit_Arel_Nodes_SqlLiteral
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 196



def visit_String(o)
  @node_stack.last.fields << o
end


  








  

    #visit_Symbol(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 208



alias :visit_Symbol :visit_String


  








  

    #visit_Time(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 199



alias :visit_Time :visit_String


  








  

    #visit_TrueClass(o)   (private)
  



  

    

Alias for #visit_String.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 203



alias :visit_TrueClass :visit_String


  








  

    #with_node(node)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/visitors/dot.rb', line 268



def with_node(node)
  if edge = @edge_stack.last
    edge.to = node
  end

  @node_stack.push node
  yield
  @node_stack.pop
end