class Erde::HashTransformer

Public Class Methods

new(hash) click to toggle source
# File lib/erde/cli.rb, line 34
def initialize(hash)
  @hash = hash
end

Public Instance Methods

to_dot() click to toggle source
# File lib/erde/cli.rb, line 38
def to_dot
  template = File.read(File.expand_path("../template.dot.erb", __FILE__))

  schema_string = ""
  schema_string << "digraph tables {"
  schema_string << "node [shape=plaintext rankdir=LR];"

  @hash.each_pair do |table_name, table_schema|
    renderer = ERB.new(template)
    schema_string << renderer.result(binding)

    table_schema['relations'].each_pair do |column, target|
      schema_string << "#{table_name}:#{column} -> #{target['table']}:#{target['column']};"
    end
  end

  schema_string << "}"

  schema_string
end