Class: Rmre::Generator

Inherits:
Object
  • Object
show all
Defined in:
lib/rmre/generator.rb

Constant Summary collapse

SETTINGS_ROOT = 
File.expand_path('../../../../db', __FILE__)
BEGIN_TAG = 
"##########BEGIN-EZMODEL-AUTO-GENERATED-SECTION##########"
END_TAG = 
"##########END-EZMODEL-AUTO-GENERATED-SECTION##########"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options, out_path, include) ⇒ Generator

Returns a new instance of Generator.



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# File 'lib/rmre/generator.rb', line 16

def initialize(options, out_path, include)
  @connection_options = options
  @connection = nil
  @output_path = out_path
  @include_prefixes = include
end

Instance Attribute Details

#connection ⇒ Object (readonly)

Returns the value of attribute connection.



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# File 'lib/rmre/generator.rb', line 8

def connection
  @connection
end

#output_path ⇒ Object (readonly)

Returns the value of attribute output_path.



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# File 'lib/rmre/generator.rb', line 9

def output_path
  @output_path
end

Instance Method Details

#connect ⇒ Object 



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# File 'lib/rmre/generator.rb', line 23

def connect
  return if @connection_options.empty?

  ActiveRecord::Base.establish_connection(@connection_options)
  @connection = ActiveRecord::Base.connection
end

#create_model(table_name) ⇒ Object 



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# File 'lib/rmre/generator.rb', line 44

def create_model(table_name)
  constraints = []

  foreign_keys.each do |fk|
    src = constraint_src(table_name, fk)
    constraints << src unless src.nil?
  end

  _file_path = File.join(output_path, "#{table_name.tableize.singularize}.rb")
  if (!File.exists?(_file_path))
    content = generate_model_source(table_name, constraints)
  else

    # read file content
    file = File.open(_file_path, "r+")
    content = ""
    line_begin = -1
    line_end = -1
    i = -1
    while (!file.eof?)
      i = i+1
      _line = file.readline

      # remove old code
      if (_line.include?(table_name.tableize.classify) &&
          _line.include?("EZModel::ActiveRecord"))
        _line = "class #{table_name.tableize.classify} < ActiveRecord::Base \n"
      end

      if (_line.include?(BEGIN_TAG))
        line_begin = i
      end
      if (_line.include?(END_TAG))
        line_end = i
      end

      content += _line
    end
    file.close()

    # remove auto generated code
    if (line_begin<line_end)
      content = content.gsub(/#{BEGIN_TAG}(.*)#{END_TAG}/im, "")
    end

    _text = content
    content = ""
    _text.split("\n").each do |_line|

      # remove include header from old version
      unless (_line.include?("require File.expand_path('../ez_models"))
        content += _line + "\n"
      end

      # add auto-gen code below class
      if (_line.include?(table_name.tableize.classify) &&
          _line.include?("ActiveRecord::Base"))
        _body = generate_model_content(table_name, constraints)
        content += _body + "\n"
      end
    end
  end

  File.open(_file_path, "w") do |file|
    file.write(content)
  end

end

#create_models(tables) ⇒ Object 



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# File 'lib/rmre/generator.rb', line 30

def create_models(tables)
  return unless tables.is_a? Array

  FileUtils.mkdir_p(@output_path) if !Dir.exists?(@output_path)

  tables.each do |table_name|
    create_model(table_name) if process?(table_name)
  end
end

#dump_schema(stream) ⇒ Object 



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# File 'lib/rmre/generator.rb', line 40

def dump_schema(stream)
  ActiveRecord::SchemaDumper.dump_with_fk(connection, foreign_keys, stream)
end

#foreign_keys ⇒ Object 



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# File 'lib/rmre/generator.rb', line 123

def foreign_keys
  @foreign_keys ||= fetch_foreign_keys
end

#process?(table_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rmre/generator.rb', line 113

def process?(table_name)
  return true if @include_prefixes.nil? || @include_prefixes.empty?

  @include_prefixes.each do |prefix|
    return true if table_name =~ /^#{prefix}/
  end

  false
end