forked from ctran/annotate_models
/
annotate_models.rb
263 lines (228 loc) · 9.2 KB
/
annotate_models.rb
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module AnnotateModels
class << self
# Annotate Models plugin use this header
COMPAT_PREFIX = "== Schema Info"
PREFIX = "== Schema Information"
FIXTURE_DIRS = ["test/fixtures","spec/fixtures"]
# File.join for windows reverse bar compat?
# I dont use windows, can`t test
UNIT_TEST_DIR = File.join("test", "unit" )
SPEC_MODEL_DIR = File.join("spec", "models")
# Object Daddy http://github.com/flogic/object_daddy/tree/master
EXEMPLARS_SPEC_DIR = File.join("spec", "exemplars")
EXEMPLARS_TEST_DIR = File.join("test", "exemplars")
def model_dir
@model_dir || "app/models"
end
def model_dir=(dir)
@model_dir = dir
end
# Simple quoting for the default column value
def quote(value)
case value
when NilClass then "NULL"
when TrueClass then "TRUE"
when FalseClass then "FALSE"
when Float, Fixnum, Bignum then value.to_s
# BigDecimals need to be output in a non-normalized form and quoted.
when BigDecimal then value.to_s('F')
else
value.inspect
end
end
# Use the column information in an ActiveRecord class
# to create a comment block containing a line for
# each column. The line contains the column name,
# the type (and length), and any optional attributes
def get_schema_info(klass, header, options = {})
info = "# #{header}\n#\n"
info << "# Table name: #{klass.table_name}\n#\n"
max_size = klass.column_names.collect{|name| name.size}.max + 1
klass.columns.each do |col|
attrs = []
attrs << "default(#{quote(col.default)})" if col.default
attrs << "not null" unless col.null
attrs << "primary key" if col.name == klass.primary_key
col_type = col.type.to_s
if col_type == "decimal"
col_type << "(#{col.precision}, #{col.scale})"
else
col_type << "(#{col.limit})" if col.limit
end
# Check out if we got a geometric column
# and print the type and SRID
if col.respond_to?(:geometry_type)
attrs << "#{col.geometry_type}, #{col.srid}"
end
info << sprintf("# %-#{max_size}.#{max_size}s:%-15.15s %s", col.name, col_type, attrs.join(", ")).rstrip + "\n"
end
if options[:show_indexes]
info << get_index_info(klass)
end
info << "#\n\n"
end
def get_index_info(klass)
index_info = "#\n# Indexes\n#\n"
indexes = klass.connection.indexes(klass.table_name)
return "" if indexes.empty?
max_size = indexes.collect{|index| index.name.size}.max + 1
indexes.each do |index|
index_info << sprintf("# %-#{max_size}.#{max_size}s %s %s", index.name, "(#{index.columns.join(",")})", index.unique ? "UNIQUE" : "").rstrip + "\n"
end
return index_info
end
# Add a schema block to a file. If the file already contains
# a schema info block (a comment starting with "== Schema Information"), check if it
# matches the block that is already there. If so, leave it be. If not, remove the old
# info block and write a new one.
# Returns true or false depending on whether the file was modified.
#
# === Options (opts)
# :position<Symbol>:: where to place the annotated section in fixture or model file,
# "before" or "after". Default is "before".
# :position_in_class<Symbol>:: where to place the annotated section in model file
# :position_in_fixture<Symbol>:: where to place the annotated section in fixture file
#
def annotate_one_file(file_name, info_block, options={})
if File.exist?(file_name)
old_content = File.read(file_name)
# Ignore the Schema version line because it changes with each migration
header = Regexp.new(/(^# Table name:.*?\n(#.*\n)*\n)/)
old_header = old_content.match(header).to_s
new_header = info_block.match(header).to_s
if old_header == new_header
false
else
# Remove old schema info
old_content.sub!(/^# #{COMPAT_PREFIX}.*?\n(#.*\n)*\n/, '')
# Write it back
new_content = ((options[:position] || :before).to_sym == :before) ? (info_block + old_content) : (old_content + "\n" + info_block)
File.open(file_name, "wb") { |f| f.puts new_content }
true
end
end
end
def remove_annotation_of_file(file_name)
if File.exist?(file_name)
content = File.read(file_name)
content.sub!(/^# #{COMPAT_PREFIX}.*?\n(#.*\n)*\n/, '')
File.open(file_name, "wb") { |f| f.puts content }
end
end
# Given the name of an ActiveRecord class, create a schema
# info block (basically a comment containing information
# on the columns and their types) and put it at the front
# of the model and fixture source files.
# Returns true or false depending on whether the source
# files were modified.
def annotate(klass, file, header,options={})
info = get_schema_info(klass, header, options)
annotated = false
model_name = klass.name.underscore
model_file_name = File.join(model_dir, file)
if annotate_one_file(model_file_name, info, options.merge(
:position=>(options[:position_in_class] || options[:position])))
annotated = true
end
[
File.join(UNIT_TEST_DIR, "#{model_name}_test.rb"), # test
File.join(SPEC_MODEL_DIR, "#{model_name}_spec.rb"), # spec
File.join(EXEMPLARS_TEST_DIR, "#{model_name}_exemplar.rb"), # Object Daddy
File.join(EXEMPLARS_SPEC_DIR, "#{model_name}_exemplar.rb"), # Object Daddy
].each { |file| annotate_one_file(file, info) }
FIXTURE_DIRS.each do |dir|
fixture_file_name = File.join(dir,klass.table_name + ".yml")
annotate_one_file(fixture_file_name, info, options.merge(:position=>(options[:position_in_fixture] || options[:position]))) if File.exist?(fixture_file_name)
end
annotated
end
# Return a list of the model files to annotate. If we have
# command line arguments, they're assumed to be either
# the underscore or CamelCase versions of model names.
# Otherwise we take all the model files in the
# model_dir directory.
def get_model_files
models = ARGV.dup
models.shift
models.reject!{|m| m.starts_with?("position=")}
if models.empty?
Dir.chdir(model_dir) do
models = Dir["**/*.rb"]
end
end
models
end
# Retrieve the classes belonging to the model names we're asked to process
# Check for namespaced models in subdirectories as well as models
# in subdirectories without namespacing.
def get_model_class(file)
require "#{model_dir}/#{file}" # this is for non-rails projects, which don't get Rails auto-require magic
model = file.gsub(/\.rb$/, '').camelize
parts = model.split('::')
begin
parts.inject(Object) {|klass, part| klass.const_get(part) }
rescue LoadError
Object.const_get(parts.last)
end
end
# We're passed a name of things that might be
# ActiveRecord models. If we can find the class, and
# if its a subclass of ActiveRecord::Base,
# then pas it to the associated block
def do_annotations(options={})
header = PREFIX.dup
if options[:include_version]
version = ActiveRecord::Migrator.current_version rescue 0
if version > 0
header << "\n# Schema version: #{version}"
end
end
if options[:model_dir]
self.model_dir = options[:model_dir]
end
annotated = []
get_model_files.each do |file|
begin
klass = get_model_class(file)
if klass < ActiveRecord::Base && !klass.abstract_class?
if annotate(klass, file, header,options)
annotated << klass
end
end
rescue Exception => e
puts "Unable to annotate #{file}: #{e.message} (#{e.backtrace.first})"
end
end
if annotated.empty?
puts "Nothing annotated!"
else
puts "Annotated (#{annotated.length}): #{annotated.join(', ')}"
end
end
def remove_annotations(options={})
p options
if options[:model_dir]
puts "removing"
self.model_dir = options[:model_dir]
end
deannotated = []
get_model_files.each do |file|
begin
klass = get_model_class(file)
if klass < ActiveRecord::Base && !klass.abstract_class?
deannotated << klass
model_file_name = File.join(model_dir, file)
remove_annotation_of_file(model_file_name)
FIXTURE_DIRS.each do |dir|
fixture_file_name = File.join(dir,klass.table_name + ".yml")
remove_annotation_of_file(fixture_file_name) if File.exist?(fixture_file_name)
end
end
rescue Exception => e
puts "Unable to annotate #{file}: #{e.message}"
end
end
puts "Removed annotation from: #{deannotated.join(', ')}"
end
end
end