Option not to line up column types and attributes in schema.rb

activerecord/CHANGELOG.md

@@ -1,3 +1,9 @@
+*   Option to remove standardized column types/arguments spaces in schema dump
+    with `ActiveRecord::SchemaDumper.standardized_argument_widths` and
+    `ActiveRecord::SchemaDumper.standardized_type_widths` methods.
+
+    *Tim Petricola*
+
 *   Doing count on relations that contain LEFT OUTER JOIN Arel node no longer
     force a DISTINCT. This solves issues when using count after a left_joins.
 

activerecord/lib/active_record/schema_dumper.rb

@@ -16,6 +16,22 @@ module ActiveRecord
     cattr_accessor :ignore_tables
     @@ignore_tables = []
 
+    ##
+    # :singleton-method:
+    # Define whether column arguments are lined up in dump.
+    # Acceptable values are true or false.
+    # This setting is only used if ActiveRecord::Base.schema_format == :ruby
+    cattr_accessor :standardized_argument_widths
+    @@standardized_argument_widths = true
+
+    ##
+    # :singleton-method:
+    # Define whether columns types are lined up in dump.
+    # Acceptable values are true or false.
+    # This setting is only used if ActiveRecord::Base.schema_format == :ruby
+    cattr_accessor :standardized_type_widths
+    @@standardized_type_widths = true
+
     class << self
       def dump(connection=ActiveRecord::Base.connection, stream=STDOUT, config = ActiveRecord::Base)
         new(connection, generate_options(config)).dump(stream)
@@ -146,20 +162,32 @@ HEADER
           keys = @connection.migration_keys
 
           # figure out the lengths for each column based on above keys
-          lengths = keys.map { |key|
+          lengths = if standardized_argument_widths
+            keys.map { |key|
               column_specs.map { |spec|
                 spec[key] ? spec[key].length + 2 : 0
               }.max
             }
+          else
+            [0] * keys.length
+          end
 
           # the string we're going to sprintf our values against, with standardized column widths
-          format_string = lengths.map { |len| "%-#{len}s" }
+          format_string = if standardized_argument_widths
+            lengths.map { |len| "%-#{len}s" }
+          else
+            ["%s"] * keys.length
+          end
 
+          # add column type definition to our format string
+          if standardized_type_widths
             # 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 "
+          else
+            format_string.unshift "    t.%s "
+          end
 
           format_string *= ""
 

activerecord/test/cases/schema_dumper_test.rb

@@ -442,3 +442,81 @@ class SchemaDumperDefaultsTest < ActiveRecord::TestCase
     assert_match %r{t\.time\s+"time_with_default",\s+default: '2000-01-01 07:17:04'}, output
   end
 end
+
+class SchemaDumperNoStandardizedArgumentWidthsTest < ActiveRecord::TestCase
+  include SchemaDumpingHelper
+
+  setup do
+    ActiveRecord::SchemaDumper.standardized_argument_widths = false
+    ActiveRecord::SchemaMigration.create_table
+  end
+
+  teardown do
+    ActiveRecord::SchemaDumper.standardized_argument_widths = true
+  end
+
+  def standard_dump
+    @@standard_dump ||= perform_schema_dump
+  end
+
+  def perform_schema_dump
+    dump_all_table_schema []
+  end
+
+  def assert_no_line_up(lines, pattern)
+    return assert(true) if lines.empty?
+    matches = lines.map { |line| line.match(pattern) }
+    matches.compact!
+    return assert(true) if matches.empty?
+    line_matches = lines.map { |line| [line, line.match(pattern)] }.select { |line, match| match }
+    assert line_matches.all? { |line, match|
+      start = match.offset(0).first
+      line[start - 2..start - 1] == ", "
+    }
+  end
+
+  def column_definition_lines(output = standard_dump)
+    output.scan(/^( *)create_table.*?\n(.*?)^\1end/m).map { |m| m.last.split(/\n/) }
+  end
+
+  def test_arguments_no_line_up
+    column_definition_lines.each do |column_set|
+      assert_no_line_up(column_set, /default: /)
+      assert_no_line_up(column_set, /limit: /)
+      assert_no_line_up(column_set, /null: /)
+    end
+  end
+end
+
+class SchemaDumperNoStandardizedTypeWidthsTest < ActiveRecord::TestCase
+  include SchemaDumpingHelper
+
+  setup do
+    ActiveRecord::SchemaDumper.standardized_type_widths = false
+    ActiveRecord::SchemaMigration.create_table
+  end
+
+  teardown do
+    ActiveRecord::SchemaDumper.standardized_type_widths = true
+  end
+
+  def standard_dump
+    @@standard_dump ||= perform_schema_dump
+  end
+
+  def perform_schema_dump
+    dump_all_table_schema []
+  end
+
+  def column_definition_lines(output = standard_dump)
+    output.scan(/^( *)create_table.*?\n(.*?)^\1end/m).map { |m| m.last.split(/\n/) }
+  end
+
+  def test_types_no_line_up
+    column_definition_lines.each do |column_set|
+      next if column_set.empty?
+
+      assert column_set.all? { |column| !column.match(/\bt\.\w+\s{2,}/) }
+    end
+  end
+end

guides/source/configuring.md

@@ -368,9 +368,11 @@ The MySQL adapter adds one additional configuration option:
 
 * `ActiveRecord::ConnectionAdapters::Mysql2Adapter.emulate_booleans` controls whether Active Record will consider all `tinyint(1)` columns as booleans. Defaults to `true`.
 
-The schema dumper adds one additional configuration option:
+The schema dumper adds additional configuration options:
 
 * `ActiveRecord::SchemaDumper.ignore_tables` accepts an array of tables that should _not_ be included in any generated schema file. This setting is ignored unless `config.active_record.schema_format == :ruby`.
+* `ActiveRecord::SchemaDumper.standardized_argument_widths` configures whether colum arguments should be lined up or not in dump. By default this is `true`. This setting is ignored unless `config.active_record.schema_format == :ruby`.
+* `ActiveRecord::SchemaDumper.standardized_type_widths` configures whether colum types should be lined up or not in dump. By default this is `true`. This setting is ignored unless `config.active_record.schema_format == :ruby`.
 
 ### Configuring Action Controller