1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
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
# 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
@info = @connection.select_one("SELECT * FROM schema_info") rescue nil
end
def header(stream)
define_params = @info ? ":version => #{@info['version']}" : ""
stream.puts <<HEADER
# This file is autogenerated. Instead of editing this file, please use the
# migrations feature of ActiveRecord to incrementally modify your database, and
# then regenerate this schema definition.
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_info", 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.inspect
spec[:limit] = column.limit.inspect if column.limit != @types[column.type][:limit]
spec[:default] = column.default.inspect if !column.default.nil?
spec[:null] = 'false' if !column.null
(spec.keys - [:name, :type]).each{ |k| spec[k].insert(0, "#{k.inspect} => ")}
spec
end.compact
keys = [:name, :type, :limit, :default, :null] & column_specs.map{ |spec| spec.keys }.inject([]){ |a,b| a | b }
lengths = keys.map{ |key| column_specs.map{ |spec| spec[key] ? spec[key].length + 2 : 0 }.max }
format_string = lengths.map{ |len| "%-#{len}s" }.join("")
column_specs.each do |colspec|
values = keys.zip(lengths).map{ |key, len| colspec.key?(key) ? colspec[key] + ", " : " " * len }
tbl.print " t.column "
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 indexes(table, stream)
indexes = @connection.indexes(table)
indexes.each do |index|
stream.print " add_index #{index.table.inspect}, #{index.columns.inspect}, :name => #{index.name.inspect}"
stream.print ", :unique => true" if index.unique
stream.puts
end
stream.puts unless indexes.empty?
end
end
end
|
