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@@ -1,10 +1,11 @@
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 module AnnotateModels
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+  class << self
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   MODEL_DIR   = "app/models"
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   FIXTURE_DIR = "test/fixtures"
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   PREFIX = "== Schema Information"
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   # Simple quoting for the default column value
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-  def quote(value)
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+  def self.quote(value)
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     case value
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       when NilClass                 then "NULL"
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       when TrueClass                then "TRUE"
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@@ -21,7 +22,7 @@ module AnnotateModels
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   # to create a comment block containing a line for
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   # each column. The line contains the column name,
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   # the type (and length), and any optional attributes
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-  def get_schema_info(klass, header)
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+  def self.get_schema_info(klass, header)
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     info = "# #{header}\n#\n"
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     info << "# Table name: #{klass.table_name}\n#\n"
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@@ -48,7 +49,7 @@ module AnnotateModels
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   # a schema info block (a comment starting
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   # with "Schema as of ..."), remove it first.
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-  def annotate_one_file(file_name, info_block)
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+  def self.annotate_one_file(file_name, info_block)
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     if File.exist?(file_name)
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       content = File.read(file_name)
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@@ -65,7 +66,7 @@ module AnnotateModels
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   # on the columns and their types) and put it at the front
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   # of the model and fixture source files.
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-  def annotate(klass, file, header)
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+  def self.annotate(klass, file, header)
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     info = get_schema_info(klass, header)
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     model_file_name = File.join(MODEL_DIR, file)
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@@ -80,7 +81,7 @@ module AnnotateModels
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   # the underscore or CamelCase versions of model names.
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   # Otherwise we take all the model files in the 
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   # app/models directory.
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-  def get_model_files
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+  def self.get_model_files
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     models = ARGV.dup
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     models.shift
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@@ -95,7 +96,7 @@ module AnnotateModels
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   # Retrieve the classes belonging to the model names we're asked to process
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   # Check for namespaced models in subdirectories as well as models
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   # in subdirectories without namespacing.
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-  def get_model_class(file)
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+  def self.get_model_class(file)
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     model = file.gsub(/\.rb$/, '').camelize
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     parts = model.split('::')
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     begin
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@@ -109,7 +110,7 @@ module AnnotateModels
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   # ActiveRecord models. If we can find the class, and
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   # if its a subclass of ActiveRecord::Base,
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   # then pas it to the associated block
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-  def do_annotations
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+  def self.do_annotations
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     header = PREFIX.dup
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     version = ActiveRecord::Migrator.current_version rescue 0
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     if version > 0