+++ /dev/null
-require 'stringio'
-require 'bigdecimal'
-
-module ActiveRecord
- # This class is used to dump the database schema for some connection to some
- # output format (i.e., ActiveRecord::Schema).
- class SchemaDumper #:nodoc:
- private_class_method :new
-
- ##
- # :singleton-method:
- # A list of tables which should not be dumped to the schema.
- # Acceptable values are strings as well as regexp.
- # This setting is only used if ActiveRecord::Base.schema_format == :ruby
- cattr_accessor :ignore_tables
- @@ignore_tables = []
-
- def self.dump(connection=ActiveRecord::Base.connection, stream=STDOUT)
- new(connection).dump(stream)
- stream
- end
-
- def dump(stream)
- header(stream)
- tables(stream)
- trailer(stream)
- stream
- end
-
- private
-
- def initialize(connection)
- @connection = connection
- @types = @connection.native_database_types
- @version = Migrator::current_version rescue nil
- end
-
- def header(stream)
- define_params = @version ? ":version => #{@version}" : ""
-
- stream.puts <<HEADER
-# This file is auto-generated from the current state of the database. Instead of editing this file,
-# please use the migrations feature of Active Record to incrementally modify your database, and
-# then regenerate this schema definition.
-#
-# Note that this schema.rb definition is the authoritative source for your database schema. If you need
-# to create the application database on another system, you should be using db:schema:load, not running
-# all the migrations from scratch. The latter is a flawed and unsustainable approach (the more migrations
-# you'll amass, the slower it'll run and the greater likelihood for issues).
-#
-# It's strongly recommended to check this file into your version control system.
-
-ActiveRecord::Schema.define(#{define_params}) do
-
-HEADER
- end
-
- def trailer(stream)
- stream.puts "end"
- end
-
- def tables(stream)
- @connection.tables.sort.each do |tbl|
- next if ['schema_migrations', ignore_tables].flatten.any? do |ignored|
- case ignored
- when String; tbl == ignored
- when Regexp; tbl =~ ignored
- else
- raise StandardError, 'ActiveRecord::SchemaDumper.ignore_tables accepts an array of String and / or Regexp values.'
- end
- end
- table(tbl, stream)
- end
- end
-
- def table(table, stream)
- columns = @connection.columns(table)
- begin
- tbl = StringIO.new
-
- if @connection.respond_to?(:pk_and_sequence_for)
- pk, pk_seq = @connection.pk_and_sequence_for(table)
- end
- pk ||= 'id'
-
- tbl.print " create_table #{table.inspect}"
- if columns.detect { |c| c.name == pk }
- if pk != 'id'
- tbl.print %Q(, :primary_key => "#{pk}")
- end
- else
- tbl.print ", :id => false"
- end
- tbl.print ", :force => true"
- tbl.puts " do |t|"
-
- column_specs = columns.map do |column|
- raise StandardError, "Unknown type '#{column.sql_type}' for column '#{column.name}'" if @types[column.type].nil?
- next if column.name == pk
- spec = {}
- spec[:name] = column.name.inspect
- spec[:type] = column.type.to_s
- spec[:limit] = column.limit.inspect if column.limit != @types[column.type][:limit] && column.type != :decimal
- spec[:precision] = column.precision.inspect if !column.precision.nil?
- spec[:scale] = column.scale.inspect if !column.scale.nil?
- spec[:null] = 'false' if !column.null
- spec[:default] = default_string(column.default) if column.has_default?
- (spec.keys - [:name, :type]).each{ |k| spec[k].insert(0, "#{k.inspect} => ")}
- spec
- end.compact
-
- # find all migration keys used in this table
- keys = [:name, :limit, :precision, :scale, :default, :null] & column_specs.map(&:keys).flatten
-
- # figure out the lengths for each column based on above keys
- lengths = keys.map{ |key| column_specs.map{ |spec| spec[key] ? spec[key].length + 2 : 0 }.max }
-
- # the string we're going to sprintf our values against, with standardized column widths
- format_string = lengths.map{ |len| "%-#{len}s" }
-
- # find the max length for the 'type' column, which is special
- type_length = column_specs.map{ |column| column[:type].length }.max
-
- # add column type definition to our format string
- format_string.unshift " t.%-#{type_length}s "
-
- format_string *= ''
-
- column_specs.each do |colspec|
- values = keys.zip(lengths).map{ |key, len| colspec.key?(key) ? colspec[key] + ", " : " " * len }
- values.unshift colspec[:type]
- tbl.print((format_string % values).gsub(/,\s*$/, ''))
- tbl.puts
- end
-
- tbl.puts " end"
- tbl.puts
-
- indexes(table, tbl)
-
- tbl.rewind
- stream.print tbl.read
- rescue => e
- stream.puts "# Could not dump table #{table.inspect} because of following #{e.class}"
- stream.puts "# #{e.message}"
- stream.puts
- end
-
- stream
- end
-
- def default_string(value)
- case value
- when BigDecimal
- value.to_s
- when Date, DateTime, Time
- "'" + value.to_s(:db) + "'"
- else
- value.inspect
- end
- end
-
- def indexes(table, stream)
- if (indexes = @connection.indexes(table)).any?
- add_index_statements = indexes.map do |index|
- statment_parts = [ ('add_index ' + index.table.inspect) ]
- statment_parts << index.columns.inspect
- statment_parts << (':name => ' + index.name.inspect)
- statment_parts << ':unique => true' if index.unique
-
- ' ' + statment_parts.join(', ')
- end
-
- stream.puts add_index_statements.sort.join("\n")
- stream.puts
- end
- end
- end
-end
\ No newline at end of file
projects / feedcatcher.git / blobdiff