class Arel::Visitors::Dot
Public Class Methods
new()
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# File lib/arel/visitors/dot.rb, line 17 def initialize @nodes = [] @edges = [] @node_stack = [] @edge_stack = [] @seen = {} end
Public Instance Methods
accept(object)
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Calls superclass method
Arel::Visitors::Visitor#accept
# File lib/arel/visitors/dot.rb, line 25 def accept object super to_dot end
Private Instance Methods
binary(o)
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# File lib/arel/visitors/dot.rb, line 167 def binary o visit_edge o, "left" visit_edge o, "right" end
Also aliased as: visit_Arel_Nodes_As, visit_Arel_Nodes_Assignment, visit_Arel_Nodes_Between, visit_Arel_Nodes_DoesNotMatch, visit_Arel_Nodes_Equality, visit_Arel_Nodes_GreaterThan, visit_Arel_Nodes_GreaterThanOrEqual, visit_Arel_Nodes_In, visit_Arel_Nodes_JoinSource, visit_Arel_Nodes_LessThan, visit_Arel_Nodes_LessThanOrEqual, visit_Arel_Nodes_Matches, visit_Arel_Nodes_NotEqual, visit_Arel_Nodes_NotIn, visit_Arel_Nodes_Or, visit_Arel_Nodes_Over
edge(name) { || ... }
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# File lib/arel/visitors/dot.rb, line 234 def edge name edge = Edge.new(name, @node_stack.last) @edge_stack.push edge @edges << edge yield @edge_stack.pop end
extract(o)
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# File lib/arel/visitors/dot.rb, line 106 def extract o visit_edge o, "expressions" visit_edge o, "alias" end
Also aliased as: visit_Arel_Nodes_Extract
function(o)
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# File lib/arel/visitors/dot.rb, line 95 def function o visit_edge o, "expressions" visit_edge o, "distinct" visit_edge o, "alias" end
named_window(o)
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# File lib/arel/visitors/dot.rb, line 88 def named_window o visit_edge o, "orders" visit_edge o, "framing" visit_edge o, "name" end
Also aliased as: visit_Arel_Nodes_NamedWindow
nary(o)
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# File lib/arel/visitors/dot.rb, line 160 def nary o o.children.each_with_index do |x,i| edge(i) { visit x } end end
Also aliased as: visit_Arel_Nodes_And
quote(string)
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# File lib/arel/visitors/dot.rb, line 252 def quote string string.to_s.gsub('"', '\"') end
to_dot()
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# File lib/arel/visitors/dot.rb, line 256 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
unary(o)
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# File lib/arel/visitors/dot.rb, line 64 def unary o visit_edge o, "expr" end
Also aliased as: visit_Arel_Nodes_Group, visit_Arel_Nodes_BindParam, visit_Arel_Nodes_Grouping, visit_Arel_Nodes_Having, visit_Arel_Nodes_Limit, visit_Arel_Nodes_Not, visit_Arel_Nodes_Offset, visit_Arel_Nodes_On, visit_Arel_Nodes_Top, visit_Arel_Nodes_UnqualifiedColumn, visit_Arel_Nodes_Preceding, visit_Arel_Nodes_Following, visit_Arel_Nodes_Rows, visit_Arel_Nodes_Range
visit(o)
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Calls superclass method
Arel::Visitors::Visitor#visit
# File lib/arel/visitors/dot.rb, line 220 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_Arel_Attribute(o)
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# File lib/arel/visitors/dot.rb, line 149 def visit_Arel_Attribute o visit_edge o, "relation" visit_edge o, "name" end
visit_Arel_Nodes_Count(o)
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# File lib/arel/visitors/dot.rb, line 40 def visit_Arel_Nodes_Count o visit_edge o, "expressions" visit_edge o, "distinct" end
visit_Arel_Nodes_DeleteStatement(o)
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# File lib/arel/visitors/dot.rb, line 59 def visit_Arel_Nodes_DeleteStatement o visit_edge o, "relation" visit_edge o, "wheres" end
visit_Arel_Nodes_InnerJoin(o)
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# File lib/arel/visitors/dot.rb, line 53 def visit_Arel_Nodes_InnerJoin o visit_edge o, "left" visit_edge o, "right" end
Also aliased as: visit_Arel_Nodes_OuterJoin
visit_Arel_Nodes_InsertStatement(o)
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# File lib/arel/visitors/dot.rb, line 119 def visit_Arel_Nodes_InsertStatement o visit_edge o, "relation" visit_edge o, "columns" visit_edge o, "values" end
visit_Arel_Nodes_NamedFunction(o)
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# File lib/arel/visitors/dot.rb, line 112 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_Ordering(o)
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# File lib/arel/visitors/dot.rb, line 31 def visit_Arel_Nodes_Ordering o visit_edge o, "expr" end
visit_Arel_Nodes_SelectCore(o)
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# File lib/arel/visitors/dot.rb, line 125 def visit_Arel_Nodes_SelectCore o visit_edge o, "source" visit_edge o, "projections" visit_edge o, "wheres" visit_edge o, "windows" end
visit_Arel_Nodes_SelectStatement(o)
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# File lib/arel/visitors/dot.rb, line 132 def visit_Arel_Nodes_SelectStatement o visit_edge o, "cores" visit_edge o, "limit" visit_edge o, "orders" visit_edge o, "offset" end
visit_Arel_Nodes_StringJoin(o)
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# File lib/arel/visitors/dot.rb, line 49 def visit_Arel_Nodes_StringJoin o visit_edge o, "left" end
visit_Arel_Nodes_TableAlias(o)
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# File lib/arel/visitors/dot.rb, line 35 def visit_Arel_Nodes_TableAlias o visit_edge o, "name" visit_edge o, "relation" end
visit_Arel_Nodes_UpdateStatement(o)
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# File lib/arel/visitors/dot.rb, line 139 def visit_Arel_Nodes_UpdateStatement o visit_edge o, "relation" visit_edge o, "wheres" visit_edge o, "values" end
visit_Arel_Nodes_Values(o)
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# File lib/arel/visitors/dot.rb, line 45 def visit_Arel_Nodes_Values o visit_edge o, "expressions" end
visit_Arel_Table(o)
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# File lib/arel/visitors/dot.rb, line 145 def visit_Arel_Table o visit_edge o, "name" end
visit_Array(o)
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# File lib/arel/visitors/dot.rb, line 210 def visit_Array o o.each_with_index do |x,i| edge(i) { visit x } end end
visit_Hash(o)
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# File lib/arel/visitors/dot.rb, line 204 def visit_Hash o o.each_with_index do |pair, i| edge("pair_#{i}") { visit pair } end end
visit_String(o)
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# File lib/arel/visitors/dot.rb, line 188 def visit_String o @node_stack.last.fields << o end
visit_edge(o, method)
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# File lib/arel/visitors/dot.rb, line 216 def visit_edge o, method edge(method) { visit o.send(method) } end
window(o)
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# File lib/arel/visitors/dot.rb, line 82 def window o visit_edge o, "orders" visit_edge o, "framing" end
Also aliased as: visit_Arel_Nodes_Window
with_node(node) { || ... }
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# File lib/arel/visitors/dot.rb, line 242 def with_node node if edge = @edge_stack.last edge.to = node end @node_stack.push node yield @node_stack.pop end