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require 'active_record/schema_dumper' | ||
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module ActiveRecord | ||
class SchemaDumper | ||
private | ||
def spec_for_column column | ||
spec = {} | ||
spec[:name] = column.name.inspect | ||
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# AR has an optimization which handles zero-scale decimals as integers. This | ||
# code ensures that the dumper still dumps the column as a decimal. | ||
spec[:type] = if column.type == :integer && [/^numeric/, /^decimal/].any? { |e| e.match(column.sql_type) } | ||
'decimal' | ||
else | ||
column.type.to_s | ||
end | ||
spec[:limit] = column.limit.inspect if column.limit != @types[column.type][:limit] && spec[:type] != 'decimal' | ||
spec[:precision] = column.precision.inspect if column.precision | ||
spec[:scale] = column.scale.inspect if column.scale | ||
spec[:null] = 'false' unless 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 | ||
class ActiveRecord::SchemaDumper | ||
private | ||
def spec_for_column(column) | ||
spec = {} | ||
spec[:name] = column.name.inspect | ||
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# AR has an optimization which handles zero-scale decimals as integers. This | ||
# code ensures that the dumper still dumps the column as a decimal. | ||
spec[:type] = case column.type | ||
when :integer | ||
column.sql_type =~ /^(numeric|decimal)/ ? 'decimal' : 'integer' | ||
when :string | ||
column.sql_type == 'uuid' ? 'uuid' : 'string' | ||
else | ||
column.type.to_s | ||
end | ||
spec[:limit] = column.limit.inspect if column.limit != @types[column.type][:limit] && spec[:type] != 'decimal' | ||
spec[:precision] = column.precision.inspect if column.precision | ||
spec[:scale] = column.scale.inspect if column.scale | ||
spec[:null] = 'false' unless 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 | ||
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# Adapted from rails 3.2 code | ||
def table(table, stream) | ||
columns = @connection.columns(table) | ||
begin | ||
tbl = StringIO.new | ||
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# first dump primary key column | ||
if @connection.respond_to?(:primary_key) | ||
pk = @connection.primary_key(table) | ||
elsif @connection.respond_to?(:pk_and_sequence_for) | ||
pk, _ = @connection.pk_and_sequence_for(table) | ||
end | ||
# Adapted from rails 3.2 code | ||
def table(table, stream) | ||
columns = @connection.columns(table) | ||
begin | ||
tbl = StringIO.new | ||
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# first dump primary key column | ||
if @connection.respond_to?(:primary_key) | ||
pk = @connection.primary_key(table) | ||
elsif @connection.respond_to?(:pk_and_sequence_for) | ||
pk, _ = @connection.pk_and_sequence_for(table) | ||
end | ||
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tbl.print " create_table #{remove_prefix_and_suffix(table).inspect}" | ||
if columns.detect { |c| c.name == pk && c.type == :integer} | ||
if pk != 'id' | ||
tbl.print %Q(, :primary_key => "#{pk}") | ||
end | ||
else | ||
tbl.print ", :id => false" | ||
end | ||
tbl.print ", :force => true" | ||
tbl.puts " do |t|" | ||
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# then dump all non-primary key columns | ||
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_for_column column | ||
end.compact | ||
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# explicitly prepend non-integer primary key | ||
if col = columns.detect { |c| c.name == pk && c.type != :integer} | ||
pk_spec = spec_for_column col | ||
pk_spec.delete(:null) | ||
pk_spec[:primary_key] = ":primary_key => true" | ||
column_specs.unshift pk_spec | ||
tbl.print " create_table #{remove_prefix_and_suffix(table).inspect}" | ||
if columns.detect { |c| c.name == pk && c.type == :integer} | ||
if pk != 'id' | ||
tbl.print %Q(, :primary_key => "#{pk}") | ||
end | ||
else | ||
tbl.print ", :id => false" | ||
end | ||
tbl.print ", :force => true" | ||
tbl.puts " do |t|" | ||
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# then dump all non-primary key columns | ||
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_for_column column | ||
end.compact | ||
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# explicitly prepend non-integer primary key | ||
if col = columns.detect { |c| c.name == pk && c.type != :integer} | ||
pk_spec = spec_for_column col | ||
pk_spec.delete(:null) | ||
pk_spec[:primary_key] = ":primary_key => true" | ||
column_specs.unshift pk_spec | ||
end | ||
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# find all migration keys used in this table | ||
keys = [:name, :limit, :precision, :scale, :default, :null, :primary_key] & column_specs.map{ |k| k.keys }.flatten | ||
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# 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 } | ||
# find all migration keys used in this table | ||
keys = [:name, :limit, :precision, :scale, :default, :null, :primary_key] & column_specs.map{ |k| k.keys }.flatten | ||
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# the string we're going to sprintf our values against, with standardized column widths | ||
format_string = lengths.map{ |len| "%-#{len}s" } | ||
# 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 } | ||
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# find the max length for the 'type' column, which is special | ||
type_length = column_specs.map{ |column| column[:type].length }.max | ||
# the string we're going to sprintf our values against, with standardized column widths | ||
format_string = lengths.map{ |len| "%-#{len}s" } | ||
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# add column type definition to our format string | ||
format_string.unshift " t.%-#{type_length}s " | ||
# find the max length for the 'type' column, which is special | ||
type_length = column_specs.map{ |column| column[:type].length }.max | ||
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format_string *= '' | ||
# add column type definition to our format string | ||
format_string.unshift " t.%-#{type_length}s " | ||
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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*$/, '')) | ||
tbl.puts | ||
end | ||
format_string *= '' | ||
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tbl.puts " end" | ||
column_specs.each do |colspec| | ||
values = keys.zip(lengths).map{ |key, len| colspec.key?(key) ? colspec[key] + ", " : " " * len } | ||
values.unshift colspec[:type] | ||
tbl.print((format_string % values).gsub(/,\s*$/, '')) | ||
tbl.puts | ||
end | ||
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indexes(table, tbl) | ||
tbl.puts " end" | ||
tbl.puts | ||
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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 | ||
puts e | ||
puts e.backtrace | ||
end | ||
indexes(table, tbl) | ||
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stream | ||
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 | ||
puts e | ||
puts e.backtrace | ||
end | ||
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stream | ||
end | ||
end |